Macrobrachium rosenbergii is an economic shrimp with fast growth, wide recipes and rich nutrition. Larger in size, up to 40 cm and weighing 600 grams, it is native to Southeast Asia. The shrimps cultured in ponds are mostly grayish yellow and cannot tolerate low temperature. The water temperature suitable for growth is 20~34℃, which requires high dissolved oxygen in water.

Macrobrachium rosenbergii is an omnivorous crustacean and likes animal food. The content of crude protein in artificially raised feed is about 37-38%, including 20% in protein and 17- 18% in protein.

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Misunderstanding of water quality management

1, the water quality is not fat at the early stage of seedling casting. After cleaning the pond, the water quality was not fertilized, so we were eager to cast seedlings. Due to the thin water body in the pond, there is a lack of biological bait for young shrimp to eat, which affects the growth and survival rate of young shrimp.

2. Changing water is unscientific. In the middle and late stage of aquaculture, the pond water is too fat, and shrimp farmers often change a lot of water at a time (especially in places where it is convenient to change water), resulting in excessive fluctuation of pond water temperature, which affects the feeding and growth of shrimp.

3. Deepen the water level blindly. The optimum water depth for Macrobrachium rosenbergii culture is1.5-1.8m. If the water body is too shallow, the water temperature fluctuates greatly and the dissolved oxygen decreases, which will easily affect the growth of prawns. The water body is too deep, the bottom of the pond can't receive sunlight, the number of phytoplankton is small, and the dissolved oxygen produced by photosynthesis is less. The decomposition of organic matter at the bottom of the pond makes the dissolved oxygen in the lower water less and less, which aggravates the deterioration of the bottom.

4. It is unscientific to choose an aerator. The aerator is suitable for shallow ponds with water depth of 1.5-2.0m; The other is the "impeller" aerator, which is suitable for deep-water ponds with a water depth of 2.0-3.0 meters.