rexresearch1
Duckweed
Duckweed Aquaculture: A New Aquatic Farming System for Developing Countries
Paul Skillicorn, William Spira, William Journey, World Bank
Water Quality. Determination of the Toxic Effect of Water Constituents and Waste Water on Duckweed (Lemna Minor)
British Standards Institute Staff
Duckweed Ethanol
Kincaid
Growth characteristics of aquatic macrophytes cultured in nutrient-enriched water: II. Azolla, Duckweed, and Salvinia
K. R. Reddy, W. F. DeBusk
Growing Duckweed to Recover Nutrients from Wastewaters and for Production of Fuel Ethanol and Animal Feed
Jay J. Cheng, Anne-M. Stomp
Creation of culture media for efficient duckweeds micropropagation (Wolffia arrhiza and Lemna minor) using artificial mathematical optimization models
Khvatkov, Pavel, Chernobrovkina, Mariya, Okuneva
Duckweed Bioconversion and Fish Production in Treated Domestic Wastewater
de Matos,et al
Duckweed Quality Improvement Through Fermentation Using <i>Trichoderma harzianum</i> and <i>Saccharomyces cerevisiae</i> on Dry Matter, Ash and Crude Fat
Setiyatwan, H, Harlia, E, Rusmana, D
Duckweed ( Spirodela polyrhiza ) as green manure for increasing yield and reducing nitrogen loss in rice production
Yao, Yuanlin, Zhang, Min, Tian
Duckweed based wastewater stabilization ponds for wastewater treatment (a low cost technology for small urban areas in Zimbabwe)
J.M. Dalu, J. Ndamba
Duckweed Aquaculture
RIEMER, DONALD N.
Duckweed: an effective tool for phyto-remediation
Gupta, Charu, Prakash, Dhan
Duckweed as an Agricultural Amendment: Nitrogen Mineralization, Leaching, and Sorghum Uptake
Kreider, Andrew N., Fernandez Pulido, Carlos R., Bruns
Duckweed (Lemnaceae): Its Molecular Taxonomy
Bog, Manuela, Appenroth, Klaus-J., Sree
Duckweed biomass as a renewable biorefinery feedstock: Ethanol and succinate production from Wolffia globosa
Soda, Satoshi, Ohchi, Takeshi, Piradee
Duckweed, A Useful Strategy for Feeding Chickens: Performance of Layers Fed with Sewage-Grown Lemnacea Species
HAUSTETN, A. T., GILMAN, R. H., SKILLICORN
Duckweed from a Biorefinery System: Nutrient Recovery Efficiency and Forage Value
SoÅta, Marcin, Åozicki, Andrzej, SzymaÅska
Duckweed ( Lemna gibba L.) as a Test Organism for Homeopathic Potencies
Scherr, Claudia, Simon, Meinhard, Spranger
Duckweed based wastewater treatment (DWWT): design guidelines for hot climates
Smith, M. D., Moelyowati, I.
Duckweed-based clean energy production dynamics (ethanol and biogas) and phyto-remediation potential in Bangladesh
Nahar, Kamrun, Sunny, Sanwar A.
Duckweed culture for wastewater renovation and biomass production
Oron, Gideon
“Duckweed-Microbe Co-Cultivation Method” for Isolating a Wide Variety of Microbes Including Taxonomically Novel Microbes
Tanaka, Yasuhiro, et al.
Duckweed for Human Nutrition: No Cytotoxic and No Anti-Proliferative Effects on Human Cell Lines
Sree, K. Sowjanya, Dahse, Hans-Martin, Chandran
Combination of heterotrophic nitrifying bacterium and duckweed (Lemna gibba L.) enhances ammonium nitrogen removal efficiency in aquaculture water via mutual growth promotion
Shen, Min, Yin, Zhifeng, Xia
Spirodela (duckweed) as an alternative production system for pharmaceuticals: a case study, aprotinin
Sandrine Rival, Jean-Pierre Wisniewski, Audrey Langlais, Hélène Kaplan, Georges Freyssinet
Use of Duckweed as Feed for Fishes in Polyculture
Kabir, ANMA, Hossain, MA, Rahman
FURTHER STUDIES ON THE ACTION OF FREE AMINO ACIDS ON FLOWERING OF DUCKWEED, LEMNA GIBBA G3
Anaerobic Digestion of Dairy Manure Combined with Duckweed (Lemnaceae)
Patrick Anthony Triscari, , Shannon Lea Henderson, , Dawn Marie Reinhold,
Duckweed as human food. The influence of meal context and information on duckweed acceptability of Dutch consumers.
de Beukelaar, Myrthe F.A., Zeinstra, Gertrude G., Mes
Cultivating duckweed Lemna minor in urine and treated domestic wastewater for simultaneous biomass production and removal of nutrients and antimicrobials
Iatrou, Evangelia I., Stasinakis, Athanasios S., Aloupi
Activated carbons for the hydrothermal upgrading of crude duckweed bio-oil
Duan, Peigao, Zhang, Caicai, Wang
Flower induction, microscope-aided cross-pollination, and seed production in the duckweed Lemna gibba with discovery of a male-sterile clone
Fu, Lili, Huang, Meng, Han
Effect of Exogenous General Plant Growth Regulators on the Growth of the Duckweed Lemna minor
Utami, Desi, Kawahata, Ami, Sugawara
Advantages and limitations of duckweed-based wastewater treatment systems
Bonomo, L., Pastorelli, G., Zambon
An integrated duckweed and algae pond system for nitrogen removal and renovation
van der Steen, Peter, Brenner, Asher, Oron
Nutritional Value of the Duckweed Species of the Genus Wolffia (Lemnaceae) as Human Food
Appenroth, Klaus-J., Sree, K. Sowjanya, Bog
Accumulation and depuration of metals by duckweed (Lemna perpusilla)
James R. Clark,et al
Sustainable bioderived polymeric materials and thermoplastic blends made from floating aquatic macrophytes such as “duckweed”
Mark Ashton Zeller, Ryan Hunt, Suraj Sharma
Effects of light and temperature on duckweed photosynthesis
Wedge, Roberta M., Burris, John E
Production of high-starch duckweed and its conversion to bioethanol
Jiele Xu, Weihua Cui, Jay J. Cheng, Anne-M. Stomp
Effects of Red-Light Intensity on the Growth of Waterstargrass, Coontail, and Duckweed
Robt. E. Wilkinson
Pyrolysis of fast-growing aquatic biomass – Lemna minor (duckweed): Characterization of pyrolysis products
Nazim Muradov, Beatriz Fidalgo, Amit C. Gujar, Ali T-Raissi
Duckweed Cultivation Patents
https://worldwide.espacenet.com/searchResults?submitted=true&locale=en_EP&DB=EPODOC&ST=advanced&TI=&AB=duckweed&PN=&AP=&PR=&PD=&PA=&IN=&CPC=&IC=&Submit=Search
Approximately 2,049 results found in the Worldwide database for: duckweed in the title or abstract...
e.g. (cultivation):
IMPROVED LEMNA (DUCKWEED) AND OTHER FEEDSTOCKS
WO2025165978
Preparations and uses of a Lemna extract derived from duckweed are disclosed. These extracts comprise complex blends of volatile and non-volatile compounds, including aromatic compounds such as phenols, flavonoids, and certain terpenes. The extract may contain other constituents such as carbohydrates (e.g. pectin), proteins, fibers, vitamins, minerals, antioxidants, and fatty acids. The Lemna extract composition has properties that make it suitable as a food additive, odorless and flavorless (by itself but it has the ability to enhance other products properties). In an embodiment, when applied to food products (both beverages and solids), the extract effectively masks undesirable aftertastes, modulates and enhances flavors, and/or improves mouthfeel, thereby serving as an excellent food flavor modifier. Various Lemna extracts demonstrate unique functionalities, such as extending melting times, enhancing the quality of ice cream, and intensifying sweetness, further highlighting its versatility as a food modifier.
Culture method for increasing duckweed thallus starch yield
CN120092689
The invention relates to a culture method for improving duckweed thallus starch yield. The method comprises the following steps: adding a nutrient solution with the initial concentration of 40-50% into a culture device, inoculating duckweed according to 1-10% of the working volume, and dynamically adjusting the concentration of the nutrient solution according to the growth stage in the duckweed growth process: 1) in the rapid growth period, maintaining the concentration of the nutrient solution to be 40-50% of the original concentration, and at the moment, keeping the chlorophyll content of the duckweed to be 0.15-0.30 mg/g; and 2) starch accumulation period: gradually reducing the concentration of the nutrient solution to 30-40% of the original concentration, wherein the chlorophyll content of the duckweed is 0.10-0.20 mg/g. The corresponding distilled water is supplemented according to the evaporation volume of the nutrient solution for 2-3 times, the distilled water is supplemented every 1-2 days, the volume of the nutrient solution is kept stable during the period, and finally the duckweed thallus with the high starch yield is obtained. The method is short in culture period and low in cost; compared with conventional culture, the method has the advantages that the biomass and starch yield of the duckweed thallus can be synchronously improved, and a new thought is provided for the starch yield and subsequent comprehensive application of the duckweed thallus.
Duckweed culture method for inducing large-scale accumulation of starch
CN119605650
The invention discloses a duckweed culture method for inducing large-scale accumulation of starch, and belongs to the field of aquatic energy plant culture. The preparation method comprises the following steps: inoculating a water body with duckweed subjected to activation and propagation culture, performing propagation culture for several days under the condition of natural light irradiation, and performing induced culture by using an oligotrophic water body to harvest duckweed thalli. In the method, a nutrient water body of a compound fertilizer is used in an enlarged culture stage, and an oligotrophic water body is used in an induction stage. According to the technical scheme, the production efficiency can be improved while the starch yield of the duckweed dormant bodies is guaranteed, and the method is simple in nutrient water body compounding operation, energy-saving, low in cost and easy to popularize and apply.
ORGANIC CONCENTRATED EXTRACT OF DUCKWEED
US2025072433
A method is provided for biologically stimulating growth of and/or regulate enhancing performance plant for agricultural and non-agricultural purposes crop plants and non-crop plants like ornamental plants, industrial material plants, energy biomass production plants, pharmaceutical interest plants, spices, algae, kelp, etc. And beneficial productivity use in aquaculture as hydroponic systems, etc. comprising applying to the plants a DuckWeed.Bio Concentrated Products depending on the target crop customized formulation product and products having an a Auxin IAA or IBA or a combination comprised of Auxins to Cytokinins by biological activity measurement approximate concentration ratio of at least 10:1 to 30:1 and up to 100:1 to 500:1 but not limited to as synergistically can reach much higher levels of ration beyond 1000:1 depending on the compounding formulation mixes of Aquatic Plants and or its extracts.
Culture method for improving duckweed protein
CN119422853
The invention relates to a culture method for improving duckweed protein, which comprises the following steps: purifying duckweed in a Hoagland working solution to obtain purified duckweed; mixing the biogas slurry with the Hoagland working solution to prepare a duckweed culture solution; wherein the concentration of the biogas slurry is 1.5%-5%, and the concentration of the Hoagland working solution is 95%-98.5%; after the purified duckweed is put into the duckweed culture solution, the duckweed culture solution is put into an incubator with preset culture conditions to be cultured, and the cultured duckweed is obtained. By adding the biogas slurry into the Hoagland working solution, the protein content of the cultured duckweed can be remarkably increased, the biogas slurry can be efficiently utilized, water resources are saved, an ideal way is provided for wastewater recycling, meanwhile, nitrogen and phosphorus in the biogas slurry can be utilized for promoting synthesis of duckweed protein, the protein synthesis efficiency is improved, and the yield of duckweed is increased. And a good basis is provided for feed research of duckweed.
Induction method of duckweed spore formation
CN119422779
The invention relates to a duckweed spore formation induction method which comprises the following steps: pretreating duckweed plants to obtain duckweed to be cultured; spraying the to-be-cultured duckweed according to a preset period by adopting a gibberellin solution, and stopping spraying when the to-be-cultured duckweed forms spores, so as to obtain the cultured duckweed. The to-be-cultured duckweed is regularly sprayed with gibberellin, so that the duckweed can be effectively induced to form spores, and no adverse effect is caused to duckweed plants. By means of the method, the duckweed resource breed conservation quality can be effectively improved, and remarkable effects are brought to cultivation of excellent duckweed quality and reduction of breed conservation cost
METHOD AND SYSTEM FOR EVALUATING CARBON SEQUESTRATION OF DUCKWEED FOR RICE-DUCKWEED SYMBIOTIC SYSTEM, AND DEVICE
US2025012770
The present disclosure provides a method and system for evaluating carbon sequestration of duckweed for a rice-duckweed symbiotic system, and a device. The method includes: after rice harvesting, collecting duckweed information in a rice-duckweed symbiotic system using spectrum scanning and laser-point cloud techniques, and determining a duckweed volume based on the duckweed information; determining a duckweed biomass in the rice-duckweed symbiotic system based on the duckweed volume; and estimating carbon sequestration of duckweed from the duckweed biomass using an artificial neural network algorithm, or estimating the carbon sequestration of duckweed from the duckweed biomass by a duckweed carbon sequestration estimation formula. The present disclosure may allow for flexible estimation of carbon sequestration of duckweed based on information such as agronomic management on rice, soil, and climate, and provide a good technical support for the management and application of duckweed in paddy fields.
Intelligent duckweed breeding equipment
CN119183943
Translation
The invention discloses intelligent duckweed breeding equipment which comprises a rotary adjusting disc, a duckweed breeding pond, a floating breeding disc and a detection assembly, the rotary adjusting disc comprises a base, a rotating ring and storage containers, the rotating ring is rotationally embedded in the base in a sleeving mode, and the storage containers are evenly arranged on the rotating ring; the duckweed culture pond is installed at the top of the base, a console is arranged on one side of the duckweed culture pond, a discharge port is formed in the edge of the duckweed culture pond, a guide pipe is vertically arranged in the duckweed culture pond, the lower end of the guide pipe is connected with a pump body through a pipeline, and the pump body is connected with a discharge pipe; the floating type cultivation plate comprises a planting plate, an annular buoy and a longitudinal adjuster, a plurality of sets of planting openings are evenly formed in the surface of the planting plate, and planting pipes are installed at the bottoms of the planting openings. According to the designed intelligent breeding equipment, the duckweed breeding space can be effectively guaranteed, the influence of diseases and pests is reduced, and the intensification degree and quality of duckweed breeding are improved.
Preparation method of duckweed peptone
CN118955608
The invention discloses a duckweed peptone preparation method which specifically comprises the following processing steps: S1, firstly cleaning duckweed, then crushing the cleaned duckweed, and extracting liquid containing duckweed protein for later use; s2, putting the duckweed protein extract into the mixed culture, and culturing for 12-48 hours; s3, adding a regulator to adjust the pH value, and then performing deoiling treatment on the raw materials by adopting a supercritical CO2 extraction method; s4, adopting ultrafiltration and permeation to quickly separate peptone and solid particles so as to improve the extraction efficiency; and S5, drying the filtered liquid to obtain a duckweed peptone finished product. The clean production technology, the biological engineering technology and the physical and chemical separation technology are comprehensively applied, the total nitrogen content of the duckweed peptone and the peptone content are effectively increased, and the production efficiency of the biological fermentation industry is improved.
Method for enhancing cadmium accumulation of duckweed by using dopamine
CN118894603
The invention discloses a method for enhancing cadmium accumulation of duckweed by using dopamine, which comprises the following steps: adding dopamine into a culture medium to obtain a culture solution, and culturing duckweed in the culture solution to obtain pretreated duckweed; dopamine is added to a to-be-treated liquid to be subjected to Cd < 2 + > adsorption, the pretreated duckweed is added to the to-be-treated liquid to be cultured, the concentration of the dopamine in the culture solution and the to-be-treated liquid is Ci, Ci is made to have different values, and according to the phenotype of the pretreated duckweed, the optimal phenotype Ci is determined to be Cmax when Ci is made to have different values; putting the pretreated duckweed into a culture medium containing dopamine with the concentration of Cmax, and culturing to obtain duckweed to be used; and adding dopamine into the to-be-treated liquid to be adsorbed with the Cd < 2 + >, so that the concentration of the dopamine in the to-be-treated liquid to be adsorbed with the Cd < 2 + > is Cmax, and then adding duckweed to be used for culture. The dopamine is found to enhance the cadmium resistance and cadmium enrichment capacity of the duckweed, so that the cadmium enrichment capacity of the duckweed is enhanced by 30%, and the dopamine has the actual capacity of being applied to remediation of water body cadmium pollution.
Kit for rapidly extracting duckweed granular starch
CN221752470
The utility model discloses a duckweed granule starch rapid extraction kit, which belongs to the technical field of extraction devices, and comprises a kit body, a grinding assembly, an extracting solution and a purification device are placed in the kit, the purification device comprises a pressurizing mechanism and a filtering mechanism, the filtering mechanism comprises a first filtering assembly and a second filtering assembly, the first filter assembly comprises a first adsorption column, a first filter membrane is arranged at the bottom end in the first adsorption column, the second filter assembly comprises a second adsorption column, and a second filter membrane is arranged at the bottom end in the second adsorption column. According to the quick extraction kit for the duckweed small-particle starch, high-quality starch can be obtained in a short time, a centrifugal machine is not needed, energy is saved, manual maintenance is not needed, the situation that centrifugal equipment fails to work is avoided, on one hand, the cost can be reduced, and on the other hand, the kit is small in size and convenient to use. The experiment space is saved, and impurities contained in the extracted starch can be quickly and conveniently removed.
High-protein duckweed feed and preparation method thereof
CN118556783
The invention discloses a high-protein duckweed feed, which comprises the following components in percentage by weight: 55-75% of carbohydrate protein component, 5-12% of fat component, 2-8% of mineral substance and vitamin component and 2-8% of additive component, and the carbohydrate protein component accounts for 55-75% of the total weight, the fat component accounts for 5-12% of the total weight, and the mineral substance and vitamin component accounts for 2-8% of the total weight. And the additive component accounts for 5-15% of the total weight. According to the formula and the preparation method of the high-protein duckweed feed disclosed by the invention, the high-protein duckweed feed is rich in protein content, can provide high-quality protein nutrition for bred animals, is beneficial to promoting the growth, development and health of the animals, can provide various nutritional ingredients required by the animals through a reasonable formula proportion and the use of additives, and is beneficial to improving the breeding quality of the animals. Comprise carbohydrates, fat, mineral substances, vitamins and the like, so that the nutrition balance of animals is favorably maintained.
SYSTEM AND METHOD FOR CULTIVATING DUCKWEED
WO2024099863
A system is disclosed for cultivating duckweed. The system comprises an illumination system that is configured to illuminate to-be-harvested duckweed in a pre- harvest area and a duckweed properties measurement system that is configured to determine one or more properties of the to-be-harvested duckweed. The system also comprises a data processing system that is configured to, based on the determined one or more properties of the to-be-harvested duckweed, determine a pre-harvest light recipe. The data processing system is further configured to cause the illumination system to illuminate the to-be- harvested duckweed in the pre-harvest area in accordance with the determined pre-harvest light recipe.
Separation equipment for extracting flavonoid substances from duckweed
CN219290659
he utility model provides separation equipment for extracting flavonoid substances from duckweed, and belongs to the technical field of separation devices. Comprising a separation tank, the inner wall of the separation tank is fixedly connected with a heating plate, the top of the separation tank is provided with an alcohol-water feeding pipe and an exhaust valve, the side wall of the separation tank is provided with a condensation connecting pipe and a chloroform feeding pipe, and the bottom of the separation tank is fixedly connected with a discharging pipe. A feeding hopper is installed on the side wall of the separating tank through a pipeline, a collecting ring is fixedly connected to the inner wall of the feeding hopper, and a filter screen is arranged above the collecting ring. By arranging the vibration motor, the supporting spring, the feeding hopper, the filter screen and the collecting ring, duckweed powder can be screened, large duckweed powder can automatically slide down from the edge of the filter screen and is collected, the filter screen does not need to be manually detached to clean the large duckweed powder, operation steps are reduced, time and labor are saved, and the working efficiency is improved. The structure is simple, operation is convenient, and the production speed is increased.
Automatic duckweed breeding device
CN218680129
The utility model relates to the technical field of automatic duckweed breeding devices, and discloses an automatic duckweed breeding device which comprises a main body, a water suction pump is fixedly connected in the main body, a wide-mouth device is fixedly connected to the front end of a drainage pipe, and a control panel is fixedly connected to the top of a supporting block. Limiting frames are fixedly connected to the tops of the connecting blocks, sliding rails are fixedly connected to the inner bottom walls of the limiting frames, second electric push rods are fixedly connected to the rear sides of the limiting frames, first sliding blocks are slidably connected to the outer walls of the sliding rails, and second sliding blocks are fixedly connected to the front sides of the sides, close to each other, of the first sliding blocks; the outer walls of the second sliding blocks are slidably connected with airing plates. According to the duckweed salvaging device, the wide mouth device can better enlarge the water inlet surface and increase the water surface flowing area to achieve duckweed accumulation, when the first rotating shaft drives the limiting frame to downwards reach a certain angle, the second electric push rod drives the airing plate to downwards salvage duckweeds, time and labor are saved, and operation is convenient.
SYSTEM AND METHOD FOR INDOOR CULTIVATION AND PROCESSING OF DUCKWEED
US2023081407
A photobioreactor system includes a growing tower tray assembly configured to utilize laminar flow to harvest a plant; a nursery subsystem configured to feed inoculum to the growing tower tray assembly; and a nutrient feeding subsystem configured to feed nutrient media to the growing tower tray assembly.
Method for enriching and separating endophytic nitrogen-fixing bacteria in duckweed
CN115595277
The invention discloses a method for enriching and separating endogenous nitrogen-fixing bacteria in duckweed, which comprises the following steps: sterilizing the surface of cleaned duckweed by using a tissue surface sterilizing solution, grinding and filtering to obtain filtrate; placing the filtrate in a nitrogen fixation culture solution to culture and endophytic nitrogen-fixing flora; carrying out gradient dilution on the culture solution, culturing in a 96-hole culture plate to obtain a bacterial solution, and carrying out PCR (Polymerase Chain Reaction) amplification, sequencing and identification; according to a PCR sequencing result, whether a miscellaneous band exists or not is judged, and whether the bacteria are single endophytic nitrogen-fixing bacteria or not is judged. The method for enriching and separating the endophytic nitrogen-fixing bacteria in the duckweed is beneficial for excavating more functional nitrogen-fixing bacteria to improve the growth rate of the duckweed, accelerating the absorption of nitrogen in the eutrophic water body, degrading heavy metals and other water environment pollution problems, and has important significance on duckweed water body remediation and water environment purification; and the water environment ecological system develops towards the direction of higher-level biodiversity and more stable self-regulation mechanism.
Efficient duckweed genetic transformation method
CN115161340
The invention provides an efficient duckweed genetic transformation method. The efficient duckweed genetic transformation method comprises the steps of induced culture of duckweed calluses, subculture of the duckweed calluses, infection of the calluses by using agrobacterium tumefaciens containing target genes, screening culture of the calluses infected by the agrobacterium tumefaciens containing the target genes and regeneration of the calluses containing the target genes. According to the method, by screening and optimizing culture media and culture conditions in each step, the screening of transformed and untransformed calluses can be realized in one month, and meanwhile, the calluses can be regenerated into complete plants with normal forms in only one month. Compared with the prior art, the method has the characteristics of higher screening and regeneration efficiency. The invention also provides application of the method in production of foreign proteins and a method for expressing cytokines by using duckweed, and solves the problems of safety problem and limited clinical use caused by using tobacco as a chassis plant to express cytokines in the prior art.
Duckweed starch extraction equipment and extraction method
CN115010816
The invention relates to the field of duckweed starch extraction, in particular to duckweed starch extraction equipment and a duckweed starch extraction method. Comprising a box body and a crushing mechanism, and the crushing mechanism is fixed to the upper surface of the box body; the crushing mechanism comprises an outer wall and a bottom wall, the outer wall is fixed on the bottom wall, the bottom wall is fixed on the box body, a plurality of baffles are fixed along the annular inner surface of the outer wall at intervals, an annular cavity in the outer wall is divided into a plurality of crushing cavities by the baffles, a rotary crushing cutter is arranged on the bottom wall corresponding to each crushing cavity, and the rotary crushing cutters are connected with an output shaft of a motor. And the motor is arranged in the box body. The starch in the duckweed is fully released, the starch is simply and efficiently extracted from the duckweed, and the provided method is simple, convenient to operate and low in cost.
METHOD FOR EXTRACTING DUCKWEED DORMANT BODY STARCH
WO2022151689
A method for extracting duckweed dormant body starch. The extraction method comprises the following steps: drying and rehydrating a duckweed dormant body to obtain a rehydrated dormant body; then soaking the rehydrated dormant body in a solvent, washing, and filtering to obtain a decolored duckweed dormant body; or pulping a fresh duckweed dormant body, soaking in a solvent, washing, and filtering to obtain decolored duckweed dormant body pulp; and then putting the decolored duckweed dormant body or the decolored duckweed dormant body pulp into a dispersion liquid, extracting for 5-60 min under the conditions that the temperature is 25-50ºC and the rotating speed is 6000-18000 rpm, filtering, centrifuging, washing and drying to obtain the duckweed dormant body starch. The dormant body starch extracted by the method is high in purity and extraction rate, the purity is 93% or above, the highest purity may be 96.54% or above, and the extraction rate is 85% or above.
Method for increasing ferulic acid productivity of Lemna paucicostata
KR102476316
The present invention relates to a method for increasing the ferulic acid production of duckweed using ethephon. More specifically, in duckweed cultured in a medium comprising ethephon, it is confirmed that the number of leaves of the duckweed has increased and the ferulic acid and GABA production are increased compared to a control group. Therefore, a method for culturing duckweed through an ethephon treatment can be provided as an industrially available method for mass producing ferulic acid and GABA, and a composition comprising ethephon can be provided as a medium additive for enhancing the content of ferulic acid and GABA in the duckweed.
Culture method of high-protein duckweed
CN114041409
The culture method of the high-protein duckweed comprises the following steps: step 1, screening a duckweed strain with the highest protein content from wild duckweed; step 2, preparing a high-protein duckweed culture solution in a sterile environment; step 3, transferring the duckweed strains screened in the step 1 into the high-protein duckweed culture solution in the step 2 for culture; and step 4, carrying out subculture propagation according to the steps 2-3. By means of the culture method, duckweed with high protein content can be obtained, and the nutrient content of feed can be greatly increased.
Intensive duckweed culture device
CN214961678
Translation
The utility model discloses an intensive duckweed cultivation device which comprises two first cultivation grooves, a second cultivation groove, a third cultivation groove and a fourth cultivation groove, the tops of the first cultivation grooves are open, and the first cultivation grooves are oppositely arranged up and down and are made of light-transmitting materials; the tops of the second culture tanks are open, the second culture tanks are arranged between the two first culture tanks at intervals up and down, the upper and lower adjacent second culture tanks are communicated through connecting cylinders, the adjacent second culture tanks and the first culture tanks are communicated through connecting cylinders, and the second culture tanks and the connecting cylinders are made of light-transmitting materials; the culture lamps are arranged around the first culture tank at intervals, and the bottoms of the culture lamps are arranged on the ground. According to the intensive duckweed cultivation device, three-dimensional and intensive cultivation of duckweed is achieved through the first cultivation grooves and the second cultivation grooves which are arranged at intervals, so that the occupied area is effectively saved, and meanwhile the lighting effect and the material accumulation efficiency are effectively improved.
Artificial planting method for duckweed
CN113349041
The invention relates to an artificial planting method for duckweed. The artificial planting method comprises the following steps that (1), duckweed seeds are selected, specifically, duckweed or spikweed is selected, and the duckweed is washed with a sodium hypochlorite aqueous solution; (2), the duckweed is cultivated, specifically, a mixture containing 20-20-20 liquid fertilizer, cane sugar and uniconazole is added into a water pool in a greenhouse, and then the duckweed is rapidly propagated; (3), preparation is carried out before putting, an outdoor pond is cleaned, then drying in the sun is carried out, and then a decomposed fertilizer is applied; and (4), field management is carried out, specifically, 100-200kg of the duckweed obtained in the step (2) is put into each mu of the outdoor pond, culturing is carried out at 18-31 DEG C for 7-18 days, the duckweed is harvested, and the density of the remaining duckweed is controlled to be 25%-50% of the covering water surface; the fertilizer is added every 7-18 days after the duckweed is put; and the additional fertilizer is additional urea and phosphate fertilizer. According to the artificial planting method for the duckweed, continuous and rapid propagation of the duckweed can be achieved, and the obtained duckweed is good in quality and high in chlorophyll content.
Culture condition optimization method suitable for rapid propagation of duckweed and application
CN113273483
The invention relates to a culture condition optimization method suitable for rapid propagation of duckweed and application. The optimization method comprises the following steps: selecting major factors influencing the growth of duckweed, and obtaining the optimal growth condition of duckweed under each major factor through a single factor test; carrying out fractional factorial test by taking the optimal growth condition under each major factor as an intermediate value, and screening the major factors influencing the growth of the duckweed; carrying out a response surface optimization test by taking the major factor as an independent variable and the duckweed specific growth rate as a response value Y to obtain optimized nutrient content data of a culture solution; establishing a quadratic multiple regression model based on the optimized nutrient content data of the culture solution; and based on the quadratic multiple regression model, obtaining a response surface diagram of the optimal condition of the nutrient solution for indicating the growth of the duckweed. Compared with the prior art, the method has the advantages of reducing test times, effectively guiding the duckweed propagation process and the like.
Common Duckweed
Lemna minor
L. gibba
Spirodela polyrrhiza
https://en.wikipedia.org/wiki/Lemnoideae
Lemnoideae
Lemnoideae is a subfamily of flowering aquatic plants, known as duckweeds, water lentils, or water lenses. They float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands. Also known as bayroot, they arose from within the arum or aroid family (Araceae),[1] so often are classified as the subfamily Lemnoideae within the family Araceae. Other classifications, particularly those created prior to the end of the twentieth century, place them as a separate family, Lemnaceae.
These plants have a simple structure, lacking an obvious stem or leaves. The greater part of each plant is a small organized "thallus" or "frond" structure only a few cells thick, often with air pockets (aerenchyma) that allow it to float on or just under the water surface. Depending on the species, each plant may have no root or may have one or more simple rootlets.[2]
Reproduction is mostly by asexual budding (vegetative reproduction), which occurs from a meristem enclosed at the base of the frond. Occasionally, three tiny "flowers" consisting of two stamens and a pistil are produced, by which sexual reproduction occurs. Some view this "flower" as a pseudanthium, or reduced inflorescence, with three flowers that are distinctly either female or male and which are derived from the spadix in the Araceae. Evolution of the duckweed inflorescence remains ambiguous due to the considerable evolutionary reduction of these plants from their earlier relatives.
The flower of the duckweed genus Wolffia is the smallest known, measuring merely 0.3 mm long.[3] The fruit produced through this occasional reproduction is a utricle, and a seed is produced in a bag containing air that facilitates flotation. ..
Use as human food crop
Duckweed is consumed in some parts of Southeast Asia, namely Laos, Thailand, and Myanmar.[6] In addition, it is also cultivated as a vegetable in Israel.[7] It produces more protein per square meter than soybeans, contains vitamins (like B12), minerals, carotenoids (lutein, beta-carotene) so sometimes it is cited as a significant potential food source.[8]
Some initial investigations, into what extent duckweed could be introduced to European markets, show little consumer objection to the idea.[9] NASA's Caves of Mars Project identified duckweed as a top candidate for Martian food production projects.[10][11] ...
Potential clean energy source
Duckweed is being studied by researchers around the world as a possible source of clean energy. In the U.S., in addition to being the subject of study by the DOE, both Rutgers University and North Carolina State University have ongoing projects to determine whether duckweed might be a source of cost-effective, clean, renewable energy.[27][28] Duckweed is a good candidate as a biofuel because it grows rapidly, produces five to six times as much starch as corn per unit of area, and does not contribute to global warming.[29][30] The rapid nature of duckweed has shown that it can double biomass within four and a half days.[31][32][33] Duckweed removes carbon dioxide from the atmosphere, and it may have value for climate change mitigation.[34]
Filtration of contaminants and nutrients
The plants can provide nitrate removal, if cropped, and the duckweeds are important in the process of bioremediation because they grow rapidly, absorbing excess mineral nutrients, particularly nitrogen and phosphates. For these reasons, they are touted as water purifiers of untapped value.[35]
The Swiss Department of Water and Sanitation in Developing Countries, associated with the Swiss Federal Institute for Environmental Science and Technology, asserts that as well as the food and agricultural values, duckweed also may be used for wastewater treatment to capture toxins and for odor control, and that if a mat of duckweed is maintained during harvesting for removal of the toxins captured thereby, it prevents the development of algae and controls the breeding of mosquitoes.[36] The same publication provides an extensive list of references for many duckweed-related topics.
These plants also may play a role in conservation of water because a cover of duckweed will reduce evaporation of water when compared to the rate of a similarly sized water body with a clear surface.
Duckweed also functions as a bioremediator by effectively filtering contaminants such as bacteria, nitrogen, phosphates, and other nutrients from naturally occurring bodies of water, constructed wetlands, and wastewater.[37][38][39]