Broodstock Nurturing Conditions and Management in Winter
Broodstock breeding is divided into postpartum care, autumn cultivation, winter cultivation and spring cultivation. Because of low winter temperatures, broodstock activities are reduced, feeding capacity is weak, and fish diseases are prone to occur; if poorly managed, it will have a great impact on the production of artificial hatching, fish seed production, and adult fish farming in the coming year. The main technical points for cultivating broodstock in winter are: Pond selection The pro-fish ponds require adequate water sources, flat bottoms, sheltered winds, and water insulation, with an area of ​​10 mu to 15 mu. Reasonable stocking The stocking density of broodstock can not only make full use of the water body, but also make the gonads develop well. Reasonable stocking density is an important condition for ensuring the success of broodstock breeding. The requirements for different varieties are: The main broodstock broodstock pond, stocking rearing weight of 5 kg to 8 kg of fish per acre 10 to 15 tails, bred broilers with the same specifications of 3 to 5 tail, tail weighs about 10 kg of broodstock fish 3 ~5 tail. The main broodstock broodstock pond, stocking rearing weight of 15 kg to 20 kg per acre species of fish 10 to 15 tail, rearing with a tail weight of about 10 kg of grass broodstock 3 to 5 tail. The main pond raising grass broodstock, stocked with 8 kg to 10 kg of broodstock per mu, 15 broodstock, broodstock or broodstock with 3 fish, head bream broodstock 12 kg. The ratio of male to female is generally 1:1.5, and the minimum is not less than 1:1. Daily management Pro-fish ponds should be staffed and carefully managed. Do a regular patrol pond, regularly add new water to increase dissolved oxygen, prevent leakage, maintain a certain water level, in order to increase the temperature of the water body. When continuous fine and water temperature is above 6°C, appropriate amount of fine material and green material should be fed to feed the fish directly to enhance the physical quality and reduce the loss of lice. For the pond where the main eel is raised, some fermented manure should be put in periodically throughout the wintering period to increase the water temperature and improve the water quality. Fish disease prevention Winter broodstock is prone to fish diseases such as water mold and white skin. Care should be taken when catching the broodstock to avoid injury to the fish's skin and scales. Do not use fish that is heavily damaged by machinery as a broodstock for the following year. Treatment of hydromycosis can use 10ppm ~ 20ppm Weikang dip, or use Weikang 0.15ppm ~ 0.3ppm Quanchiposa. Glass Venlo Greenhouse is Spire-type glass design, design and installation of windows when more convenient and easy. Its roof slope andle can be appropriately according to the local real climate change the environment. Glass Venlo Greenhouse,Flowers Glass Greenhouse,Nursery Glass Greenhouse,Vegetables Glass Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com
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