As the saying goes, a good seedling is half a grain, which fully shows that seeds have a great influence on harvest. How to choose shrimp seedlings? Tell you the following aspects:
1, healthy and disease-free: shrimp looks energetic and full of vitality, while those shrimps that look poor in vitality often lurk diseases. When introduced at one end, the whole shrimp group will be infected with diseases.
2. Choose tender shrimp. Those old shrimps are often inbreeding, with slow growth, small size and poor economic benefits.
3. Choose excellent varieties of shrimp fry, which have good varieties, strong disease resistance, not easy to get sick, fast growth and high efficiency. The Yangtze River 1 shrimp seedlings are cultivated by introducing excellent shrimp seedlings from abroad, and the adult males can reach 3 Liang and females can reach 2 Liang. Yangtze river 1 shrimp larvae can reach 1- 1.5 in 60 days.
4. It is very important to insist on self-propagation and self-support and put an end to the transfection of foreign diseases. Indoor shrimp culture box can be used to cultivate fry, which can be propagated many times a year, and is not affected by seasons, with high benefits.