In the years of crab breeding, Yu Lizhong, a farmer of crab farming in Jiangsu Province's Nonghai Linhai Farm, summed up an efficient technique for the management of male and female sterility in crabs. In 2009, his farmed crabs produced an average yield of 82 kilograms and a rate of 98%. His sub-cultivation techniques are: the depth of the cultured crab pond should be maintained at about 1.5 meters, the slope ratio at Tangkou should be 1:3, and the water supply should be sufficient. The water plants in the pond should be planted with Elodea and Vallisneria to purify the water quality. 70% of the water surface is good for crabs to eat and inhabit clam shells. It is made of gauze and plastic film on the anti-escape facilities. It is simple and durable, saving labor and money. Into the dry pools and clear ponds after 2 months of disinfection, 100 kg of lime per acre was used for disinfection. In stocking stocks, Yu Lizhong stocked all the crabs. The general stocking time was in March. He picked the male and female crabs and then stocked them in separate ponds. They put 450 amu per mu, and the specifications were 160 to 180 per kg. There are 10 tails and 10 squids with a specification of 160 grams per tail and 100 kg of snails per acre before Chingming. Feeding is not fed in the feed during the early period of feeding because the plants in the crab pool can meet the needs of crabs, and some pumpkin, small trash fish or special crab feeds are added in the middle and later stages to increase the protein content. Actively promote the ecological techniques of river crab breeding. In the prevention of disease and water quality management, adhere to the principle of ecological disease prevention, regularly sprinkling microbial preparations and quicklime disinfection to improve water quality, and always maintain the “fat, live, tender and cool†of water quality. Change the water every 10 days to 15 days, change the water every time about 30%, avoid large-scale row, to prevent damage to the water environment, a stress response to the crab. As the crabs are bred and bred in separate ponds, the growth of male crabs is avoided, resulting in superiority in oyster hulls, competition for food, and slaughter. The balanced growth is achieved, resulting in a lower mortality rate of crabs and a high rate of return, with an output value of 7,650 yuan. Mu benefit 3850 yuan. Nicotinamide Mononuclotide,Pure NMN Power For Eye Cream,NMN Raw Material Of Eye Cream Yuyao Lifespan Health Technology Co., Ltd. , https://www.yuyaolifespan.com