2. Duckweed itself can purify the water quality, but when it grows wildly in a large area, it will destroy the ecological balance of the water body, consume a lot of oxygen in the water body, and lead to the death of other creatures in the river, and these duckweeds will cause new pollution after they die and rot.
3. The lateral buds on the water surface propagate quickly. Pay attention to the appropriate light intensity, too weak growth, too strong high temperature will burn the surface of plants. 4. Floating grass. Roots 1, 3-4 cm long, slender, root sheath without appendages. The thallus is symmetrical, obovate, ovoid or nearly round, long 1.5-6 mm, smooth on both sides, green and opaque, with three inconspicuous veins. Flowers are unisexual, monoecious, born on the edge of the thallus, spatula is saccate, with/kloc-0 female flowers and 2 male flowers; Male flower anthers 2-loculed, filaments slender; The female flower has/kloc-0 stamens, the ovary has/kloc-0 cells, and the ovule is solitary. The fruit is round. As the saying goes, "honey is honey, and arsenic is here", some people worry that duckweed breeds too fast, while others want to plant duckweed. Jianming Shen of Longxiang Street contracted 57 mu of land in Puyuan, intending to develop water bamboo planting. During this time, he was busy spreading duckweed in the water bamboo field. It turns out that duckweed breeding in the water bamboo field is a magic weapon for local farmers to get rich. "In hot weather, duckweed can lower the water temperature and ensure the growth of Zizania latifolia." Jianming Shen said that Zizania latifolia planted in the field has a good and white appearance, and its income per mu is 700-800 yuan higher than that of ordinary Zizania latifolia. 6. To cultivate duckweed, duckweed with purple back is the best choice. Because of its large size and strong heat resistance, duckweed can grow and develop rapidly in shallow ditches and rice fields, and reproduce faster in warm, humid and rainy seasons. At the end of autumn, the water temperature drops, and the mother grows oval winter buds, which automatically sink into the bottom mud for the winter, and then the mother withers and dies. The next spring, the water temperature rose, winter buds slowly surfaced, and then new larvae sprouted.
Question 2: How to breed duckweed floating grass? Roots 1, 3-4 cm long, slender, root sheath without appendages. The thallus is symmetrical, obovate, ovoid or nearly round, long 1.5-6 mm, smooth on both sides, green and opaque, with three inconspicuous veins. Flowers are unisexual, monoecious, born on the edge of the thallus, spatula is saccate, with/kloc-0 female flowers and 2 male flowers; Male flower anthers 2-loculed, filaments slender; The female flower has/kloc-0 stamens, the ovary has/kloc-0 cells, and the ovule is solitary. The fruit is round.
Question 3: How to cultivate duckweed duckweed with purple back, also known as duckweed and duckweed, belongs to duckweed family. The leaves are green and the back is purple, and they grow in paddy fields, ponds and ditches. Breeding is faster in warm, wet and rainy seasons, and 25℃ ~ 30℃ is the optimum temperature for growth, and the growth in high temperature season is affected. In late autumn, the water temperature drops, duckweed grows oval winter buds, sinks into the water for the winter, and its mother dies. In the following spring, winter buds float to the surface and germinate into new individuals, which is the favorite feed for grass carp fingerlings. The suitable pond area for duckweed culture is 1334-2668 square meters, and the pond or river with stable water level, deep sediment and fertile water quality should be selected as the breeding pond. Generally, wild fish are removed at the beginning of April, and 200 kilograms of cow dung and pig manure are applied as base fertilizer every 667 square meters, and then 100-200 kilograms of duckweed is added every 667 square meters. He can't plant any more or less seeds that have been cultivated last year.
The quality and quantity of fertilizer is the key to duckweed cultivation. In spring and autumn, duckweed breeds quickly, so more topdressing should be applied, and less application can be applied when the temperature is high. If the plankton in the pond is reduced, the transparency is high, and duckweed takes more roots, it is because the water quality and fertility are insufficient, so it is necessary to apply more and more frequently; On the contrary, it can be used in a small amount. Generally, manure should be applied every 5 days 1 time. After the pool is full of duckweeds, you can fish, and the number of duckweeds should not exceed 30% of the total. The yield of duckweed is generally 20-30 tons per 667 square meters. If the temperature is suitable and the water quality is fertile, the yield can be increased. Duckweed has high nutritional value. Duckweed contains 9 1% moisture, 1.6% protein, 0.8% fat and 6.6% other organic matter. Protein and its fat content are higher than other aquatic plants. Duckweed is a high-quality bait for grass carp.
Question 4: How to raise duckweed? As shown! . Breeding is faster in warm, wet and rainy seasons, and 25℃ ~ 30℃ is the optimum temperature for growth, and the growth in high temperature season is affected. In late autumn, the water temperature drops, duckweed grows oval winter buds, sinks into the water for the winter, and its mother dies. In the following spring, winter buds float to the surface and germinate into new individuals, which is the favorite feed for grass carp fingerlings. The suitable pond area for duckweed culture is 1334-2668 square meters, and the pond or river with stable water level, deep sediment and fertile water quality should be selected as the breeding pond.
Question 5: How to breed duckweed 1 with long beard. After clearing the pond, apply 400 ~ 500 kg of organic fertilizer per mu. Use bamboo to divide the water surface into crosses, and then add duckweed species 15 ~ 25 kg per mu. After May, 35 ~ 40 kilograms of organic fertilizer should be applied every two days per mu, or diluted with 1 kg ammonium bicarbonate and 500 grams of calcium superphosphate, and then scattered in the whole pond to accelerate duckweed reproduction and cultivate palatable natural feed.
Question 6: Does duckweed reproduce by stems? Yes, it can be propagated by seeds and ramets.
Seed propagation: harvest mature seeds, pack them into balls with yellow mud, each ball contains 2-3 seeds, and put them into cultivation water.
Propagation by ramets: In spring and summer, some mother plants are fished out and dispersed into cultivation water.
Question 7: How does duckweed spread seeds?
Seed propagation and ramet propagation.
Seed propagation
Harvest mature seeds, package the seeds into small balls with yellow mud, each ball contains 2-3 seeds, and put them into cultivation water.
fissiparity
In spring and summer, some mother plants are fished out and dispersed into the cultivated water.
Question 8: How many duckweeds are bred a day? More than 5 duckweeds a day.
Question 9: The cultivation techniques of duckweed include seed propagation and ramet propagation. Seed propagation, harvesting mature seeds, wrapping the seeds into small balls with yellow mud, each ball containing 2-3 seeds, and putting them into cultivation water. Breeding by dividing plants in spring and summer, taking out some mother plants and throwing them into the culture water. This chemical component contains a large number of water-soluble vitamins, such as vitamins B 1, B2 and C, and luteolin -7-β- glucoside. Flavonoids such as 8- hydroxyluteolin-8-beta-glucoside and substances such as iodine and bromine. Its polysaccharide is a rich source of D- coriander sugar. It also contains resin, wax, steroids, chlorophyll, sugar, protein, mucus, tannin and so on. Pharmacological action 1, cardiovascular action Water extract has cardiotonic effect on the heart of aging frog caused by quinine, and calcium can enhance this effect, and the heart stops in diastolic phase at high dose; It constricts blood vessels and raises blood pressure. 2. Antipyretic effect 2 g/kg decoction and infusion were given orally to rabbits with fever due to injection of typhoid mixed vaccine, which proved to have weak antipyretic effect. 3. Other antibacterial and antimalarial tests were negative, and Culex pipiens larvae and pupae could be killed in laboratory and field. Characteristic efficacy enters the lung meridian. Sweating, expelling wind, promoting blood circulation, clearing away heat and toxic materials. It can be used for treating heat carbuncle, macula, wind-heat pain rash, skin itching, edema, amenorrhea, tinea, erysipelas, and burn. Oral administration and dosage: decoction, 5 ~ 10g (fresh 25 ~ 150g); Pour juice or take pills. External use: decoction, fumigation, grinding, coring or application. The literature discusses Ben Jing: controlling sudden fever and itching, eliminating dampness, winning wine, promoting hair growth and quenching thirst. "No recording": breathing, bathing and hair growth. Tang dynasty herbs: treating fire sores. Notes on Materia Medica: Anhydride at the end of application; Take it with juice to treat edema and diuresis; If another person is poisoned, end with Ping Zi * * * and take a square inch of wine; And long hair cream. Herbal medicine for daily use: treating heat toxin, wind fever, fever mania, toxic swelling, soup fire sore and rubella. Materia Medica: Treating fever in time is comparable to sweating. Southern Yunnan herbs: sweating and detoxifying. Treat scabies, scabies and itching. Outline: Treating rheumatism paralysis, beriberi, traumatic injury, red eyes, sores on the mouth and tongue, vomiting blood, epistaxis, paralysis and erysipelas. Medicinal solution of sorbus sorbus. Treat plague macula, stroke skew and paralysis; Treat carbuncle, heat swelling, itching, waxberry, acne and sweat spot. "Lingnan Materia Medica Collection": People suffering from wind bathe in duckweed with purple back several times; If the water is poisonous and your hands, feet, elbows and knees are cold, use it to soak and wash. Illustration of Chinese Medicinal Plants: Insects Bite and Pour Juice. Classic: Xin Liang. "No recording": acidic, non-toxic. Southern Yunnan herbs: cold in nature and bitter in taste. Compendium of medicinal forest: pungent, flat and salty. Outline: entering the lung meridian. Explain the nature of drugs processed by Lei Gong: entering the lungs and small intestine. Materia Medica Seeking Truth: Entering the Liver and Spleen. Identification of medicinal materials: The thallus is ovoid, ovoid or ovoid with a diameter of 3-6mm. Single scattered or 2-5 aggregated, the upper surface is light green to grayish green, the lower surface is green to purplish brown, the edge is neat or slightly curled, there are small depressions on both sides of the upper surface, and several fibrous roots are born on the lower surface. Light and crisp. A slight breath, a faint taste. It is best to have a green and purple back. Microscopic identification: on the surface of the bacteria, the vertical wall of the upper epidermal cells is wavy, and the stomatal infinitive: the vertical wall of the lower epidermal cells is nearly straight, without stomata. The parenchyma cells in the upper epidermis are oval to round with intercellular spaces, and some contain calcium oxalate clusters with a diameter of 13-20um. Some of them contain needle crystals, the length of which is 17-30m, and the cells are larger. The inner side of the lower epidermis is ventilated tissue, which is composed of parenchyma cells with large intercellular spaces. Medication of "Ben Cao Jing Shu" is not suitable: it is not suitable for people with qi deficiency and spontaneous sweating. "Famous Materia Medica from the New": Unless it is hot, you can't act rashly. Depei Materia Medica: blood deficiency and dry skin, qi deficiency and wind pain, both of which are forbidden. For exogenous wind-heat and measles, it is often used with Xihe willow, burdock and mint. For wind-heat addiction, it can also be taken orally and externally. Duckweed can clear away heat and promote diuresis, so it is used for edema and exterior heat.