Small cages without pollution

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Astragalus cultivation has a variety of methods such as field cultivation, pond raising, and cage culture. The author believes that the small cage culture model that simulates the natural environment of Astragalus membranaceus is the most successful and the most effective. The large and small water surfaces can be used, and the investment can be varied. In recent years, 3,330 hectares have been developed in our region and the benefits are considerable. First, siting. Huangxi is afraid of light and Xiqing is afraid of panic. Therefore, we should choose a pond with fresh water, sufficient water, no pollution, easy access to water, less external interference, and small water level fluctuations. The area can be large or small, and the water depth should be 1.5 meters. Second, the cage production and layout 1, the production of cage selection of high-quality non-toxic polyethylene flat mesh, that is, double-lined strands do not move the white or light green mesh, specifications 2 meters 6 meters or 2 meters 7 meters , The height of the box is 1.5 meters; the mesh size is based on the principle that the jaundice cannot escape and facilitates the exchange of water bodies. 2. Before the stocking, the cages shall be soaked in water for 20-30 days to eliminate the toxicity of the polyethylene mesh and to make some algae on the mesh to enhance the smoothness of the mesh. 3, cage with bamboo or bamboo stand around the box, can be fixed up and down. If the water surface is large, two wire ropes can be pulled on both sides of the direction of the arrangement of the cage, and the four corners of the cage are fixed vertically with a bamboo pole, and the wire rope is fastened. The box is 50-60 cm above the surface of the water, and the area of ​​the cage should not exceed 60% of the pond area for the exchange of water and daily management. Third, the box planted grass. Huang Xi used to burrow, but when the water temperature is above 30°C, he prefers to float on the surface of the grass floating on the water. Small cage cages are based on this feature and it is especially important to plant grass. Choose water hyacinth or Alternanthera philoxeroides (the latter is the best), the area should be 90% of the surface of the box, with the wooden rod horizontally isolated. The seedlings must reach 50% or more and grow well before entering the box. Potassium dihydrogen phosphate is necessary to make up the foliage. Four, seedlings collection and delivery 1, species selection: At present, the source of seedlings cultured Astragalus is still mainly by collecting wild seedlings. Its species is better than the deep yellow and large nymphs (also known as gills), but the latter rarely seed; barley, black sorghum grow slowly, not breeding. 2, seedlings collection: the collection time, the temperature is stable through more than 30 °C is appropriate. Pay attention to avoiding the oviposition period and avoid catching seed on rainy days, otherwise it will affect the survival rate. Captive traps should be selected for catching seedlings. If the seedlings are acquired, it should be noted that the catching and catching of seedlings cannot be purchased. 3, stocking specifications: 20-40 / kg is appropriate, according to every 12-14 square meters cage 10 kg seedlings. The seedlings to be placed in cages should be of the same specifications as the ones purchased in the same batch so as not to kill each other. The vote should be taken on sunny mornings or evenings. V. Feeding and management 1. Disinfection: Afforestation ponds are disinfected with 100-150 kg of lime per acre, and water is hung in hanging boxes after 10-15 days. 7-10 days before entering the box, disinfect the tank and the embedded plants with chlorine dioxide and other disinfectants. The collected species were soaked in a holding tank (pool) with yiodomethane for 10-15 minutes. Disinfect the water body every 10-15 days. Refer to the fish pond disinfection method. 2, feeding and Shun food: Astragalus is an omnivorous animal, prefers animal food. The bait is mainly made of earthworms, fresh fish paste and full-price compound feed, and most of them are mixed and fed, and generally each account for 50%. The jaundice could not be fed within 3 days after entering the box, but after 3 days, it was started to feed along with it: first, the fresh fish paste was added with a small amount of compound feed to gradually increase; after 7 days, the normal feeding amount was reached. 2-3 feeding points per box. Feed at 5pm. 3, transfer male processing: Astragalus is the only degenerate fish. The conversion from female to male can significantly increase the growth rate. After eating for a few days in the box, mix "HTD-1" with 20 mg/kg in the bait and feed it for 7 days. 4, daily management: regular observation of feeding conditions, remove the residual bait every morning. After a normal feeding, the insects were repelled once a month, and the medicine was mixed in the feeding and fed for 2-3 days each time. 5. Overwintering measures: Feeding of animal feeds should be strengthened 20 days before food intake, and external use of internal medicines should be suspended and water should be deepened to facilitate the successful wintering of yellow cocoons. (Chen Guoan, Agriculture Department, Heshan District, Yiyang City, Hunan Province)

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