1. Choose a rectangular pond with an area of about 5 ~ 10 mu. Pond depth1.5 ~ 2m. Cover the pond with greenhouse to achieve the purpose of heat preservation or shade, and adjust the water temperature in midsummer and winter, so that grouper can grow normally all year round. Cages are erected inside, each cage is 4m× 4m× (1.2 ~ 1.5) m, depending on the depth of the pool. Before entering the pond, thoroughly disinfect the pond with bleaching powder or tea cakes to remove wild miscellaneous fish. Fertilize after entering the water, and release the fry when the water in the pool is slightly green.
2. After releasing the seedlings, with the feeding and fish excretion, the organic matter in the pond gradually increased. Inoculate and cultivate photosynthetic bacteria and nitrifying bacteria, adjust the ecological balance in the pond, and keep the transparency of the pond water at about 30 cm. Usually, water is not changed, and only fresh water of about 10 cm is added appropriately. When the color of the water is too dark, change the water to about 15 ~ 20cm. The exchanged water comes from another specially set ecological reservoir, which usually cultivates photosynthetic bacteria and nitrifying bacteria. Each cage can accommodate 2000 grouper fry with a length of 12 ~ 15cm, which will gradually decrease with the growth in the future, and it is appropriate to cultivate 400 grouper fry in each box. In the process of culture, the fish are cultured in boxes according to the size in time, which is beneficial to the feeding and growth of the fish. When fry were young, soft pellet feed with comprehensive nutrition was made from minced fish mixed feed, which is now ready to be fed. The bait for adult fish culture is small miscellaneous fish such as fresh Balaam and Yujin. Feeding after taking cleaning and disinfection measures. A 5-mu pond, with such an ecosystem, can breed about 5,000 groupers.
The content of this article comes from: China Agricultural Development Report by China Agricultural Publishing House.