Winter and spring fish stocking management techniques

"Spring fish and fish species, and fish species in winter are three minutes long." Practice has proved that the winter solstice to the beginning of the spring is the best time for the release of fish species, is conducive to early adaptability of fish species to the environment, and facilitate the overwinter management, promote the spring and long fish species, increase production. The specific practices for stocking fish species during wintering are as follows: I. Five changes of fish ponds: "Xiaotang" to "Datang"; "Dead pool" to "living pond"; "Shallow pond" to "deep pond"; "Leak pond" "Water reservoir"; "rescue pond" to "flood pond". Renovate the pond and release the water first. After exposure, remove excess silt and only retain 15-20 cm thick silt, remove weeds, dredge the channels, and increase the pool height. Second, clear pond disinfection pond to stay deep 10 cm, the first mu 90 kg of lime or chlorine bleach 30% bleach 4 kg, transferred into a paste evenly spilled the whole pond; and then filled with water, mu bleaching 12 kg, spread evenly, fully agitation. Increase the calcium in the pool and achieve the disinfection effect. Generally, fish can be released after 7 days. Third, fertilizer submerged pond clear pond 5-7 days after the base fertilizer. Generally, 500-700 kilograms of cow dung are fermented per mu pond, or 200 kilograms of human excrement (more can be used in Xintang or the thin pond, and less or no fertilizer can be applied in the pond), and then the winter water (wax water) can be used. Phytoplankton grows and provides natural food. Fourth, the fish species specifications grass carp body length 15 cm, carp 13 cm, carp and carp 10 cm or more. Selecting the rules of the same fish species, robust physique, complete scales, non-destructive fins, stubby caudal peduncle, thick back muscles, bright color, strong anti-water, disease-free without injury, frequent beating, is conducive to improve the survival rate of fingerlings. Fifth, pay close attention to early winter solstice before and after the Spring Festival, or the water temperature is about 8-10 °C is the best time for stocking fish species, the industry has "open water stocking, fish species fiercely long" argument. At this time, the water quality is stable, the fish body is strong, the fish body is not easy to be injured during fishing and transportation, and the mortality and morbidity are low. At the same time, fish species will be raised early, and they will adapt to the environment earlier and eat and grow faster as soon as possible. When stocking, it is better to choose to do it on a sunny day at noon. It is not appropriate to store in frosty and rainy days when the temperature is too low, and to prevent frostbite. Sixth, fish fingerlings to be disinfected into the pool. Generally, 3-5% bleaching powder and 8% copper sulfate can be used to wash the fish species for 20-30 minutes; or use 3-5% saline to dip for 5-10 minutes to achieve the effect of killing pathogenic bacteria on the body surface. 7. Reasonable polyculture Based on the water quality, bait, and species size of fishery waters, determine the reasonable stocking density and stocking capacity. Water and fertilizer are mainly fertilization. Combining feeding and feeding, salmon and squid should be used as the main, and the ratio of polyculture should be: 55-60% of carp, 15% of carp, 10% of grass carp, carp, carp, carp Such as 5-10%; water thin, mainly feeding, green feed, should be based on grass carp, polyculture with the proportion of: 40-50% of grass carp, carp 20%, carp 5-10%, carp 10 %, 5-10% of carp, carp, carp, etc. The stocking capacity is about 1,000 per acre. VIII. Strengthen the management of ponds There must be someone responsible for management. Change the water every 20 days 1 time, add 15-20 centimeters of water each time, implement the first post irrigation, adjust the water quality, cool the weather, deepen the water level to more than 2 meters; ponds with low oxygenation and no oxygen for a long time, Use 5-6 kg of ammonium nitrate per acre, 3-4 kg of superphosphate, and mix it into a thin-eye cloth bag and hang it under water. Stir the bottom of the pond with bamboo rafts at noon on a sunny day and stir the other part after a period of time. Once a month. The wintering pond should be properly cast some pig manure, distiller's grains, bean cakes or cakes, etc. to increase the water temperature and meet the needs of the wintering species. When the spring water temperature reaches 7-8°C, early feeding and fertilization should be used to grow fertilizer and water to promote growth. Nine, prevention and treatment of fish diseases during the winter fish species susceptible to water mildew, red skin disease, etc., once found fish infections to early diagnosis and treatment. Aquatic mildew can be mixed with 4% salt and 4% baking soda to splash the whole pool, or 1 meter deep water with 10ppm bleach solution. Red skin disease is splashed once with 1ppm bleaching powder and once a day, it is splashed once with 0.5 kg of lime, and then on the fourth day, it is spilled with bleach 1ppm. Incidental helminthosis and filariasis use 0.2-0.1g of mercuric nitrate per cubic metre of water in the whole pool, or 0.25g of dried chilli powder per cubic meter of water, 0.1g of ginger, and boiling water. Sprinkle and use it twice. The fish gills were sprinkled with 0.2-0.5 ppm of 90% crystal enemy white insects.

Greenhouse Wiggle Wire

Wiggle wire lock is designed to be used with poly lock base cap- sold separately. Greenhouse wiggle wire and base care are an effective method of attaching your poly film roof and or shade cloth. The greenhouse wiggle wire lock will hold form 4 mil to 20 mil thickness of material. Use one wire to hold the roof in place and then add a second wire to hold your shade cloth. When it is time to remove the shade cloth, you will not disturb the roof plastic.
Universal Base (WIG2000)- used on the curved surface, i.e. the arch for attaching the end wall covering.
Standard Base (WIG1000) - used along the straight lengths of your greenhouse.

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