Xu Zhihua conducted comparative tests in two ponds. No. 1 pond is sprinkled with enzyme bacteria, with fish, shrimp, fertilizer and water, and 50,000 shrimps per acre. He diligently applied thin water, did not use water purifiers and bactericidal drugs, but he did not experience shrimp floating heads and dead shrimps. The survival rate of shrimp was above 95%. When harvested four months later, the shrimp harvested was 1,750 kilograms, and about 800 kilograms could be stored in the pond. He received a net income of 5,000 yuan per mu, which has significant economic benefits.
Xu Zhihua's No. 2 pond has an area of ​​5.5 mu, which is the same batch of shrimps in the same period as No. 1 pond. The stocking densities are the same but they are managed by conventional methods. At the beginning of May, there was a sudden blue-green algae on the No. 2 pond. The shrimps patted the pond and did not eat bait. There were dozens of dead shrimps on the side of the pond each day. Xu Zhihua applied enzyme bacteria and fish and shrimp fertilizer at pond No. 2. Three days later, the blue-green algae was gone, the floating phenomenon of the shrimp decreased, and the diet was resumed. Until May 23, no dead shrimp was found. Upon acceptance on June 21st, No. 2 ponds have received 800 kg of shrimps on the market, and there are about 750 kg of shrimps in ponds with an average yield of 281.5 kg per mu. The food in Pond No. 2 was relatively reduced, but the cost of drugs increased, and the net profit was about 630 Yuan per mu.
In the same period of stocking and equal density of the shrimps, the No. 1 pond was treated with enzyme bacteria and fish and shrimp fertilizers for a long time. The effect of water conservation was good. The survival rate of the shrimps was high and the growth was fast. The cost of the water purifying agent and bactericide was saved. Some of the bait costs, net income is 4370 yuan more than conventionally managed pond 2 ponds
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