Based on years of scientific and technological guidance experience, the nutrition of current river crab breeding is very critical, and it is an important factor in determining whether large-scale and high-quality river crabs can be grown in the end. At present, it is necessary to provide river crabs with sufficient nutrition and supplement sufficient minerals to ensure smooth shelling of river crabs and lay a solid foundation for breeding large-sized river crabs.

1. Before June 10, feed small fish and high-quality compound feed, or add other high-quality animal protein to ensure the growth and nutrition of river crabs. On the premise of ensuring the shelling of river crabs, before the high temperature period comes, cultivating the strong physique of river crabs can effectively improve the quality, size and survival rate of river crabs. It should be noted that it is difficult to breed high-quality large-sized river crabs by feeding roughages such as corn and pumpkin.

2. Supplement sufficient types and quantities of minerals in the pond water to ensure the smooth shelling of river crabs and promote the shelling and growth of river crabs. Without sufficient variety and quantity of minerals, crab shelling may be delayed or even not shelled. It should be noted that the use of quicklime or the application of phosphorus and calcium fertilizers in the pool water cannot meet the needs of river crabs for various minerals, and cannot fully supplement minerals. In addition, improper use of quicklime can easily lead to the death of aquatic plants and river crabs, and improper use of phosphorus and calcium can easily cause bad water. (Ding Jiangen, Kunshan Aquatic Products Technology Promotion Station)