How to conduct double-season culture of freshwater shrimp in ponds?

Shrimp culture can be divided into spring and autumn. Generally, the shrimp culture time in spring is 65438+ from February of that year to the end of June of the following year; Autumn shrimp is from July of that year to the end of 1 1.

(1) pond conditions

The pond is rectangular with an area of 5-8 mu. The water inlet is filtered with 80 mesh screen wire to prevent wild fish from entering. Equipped with micro-porous pipe oxygenation facilities. After the pond is exposed for 20 days, the shrimps in spring are cleaned and disinfected 10 day before stocking, and then compound fertilizer 10 ~ 25 kg is applied per mu; Autumn culture means that after the spring shrimp is completely caught at the end of June, the pond is cleaned and disinfected in the dry pond, and 60 ~ 80 cm fresh water is injected before the seedlings are released. (2) Rational stocking of seedlings

In spring, the breeding larvae of Macrobrachium nipponense are released from February of that year to early March of the following year, with the specification of 2000 ~ 3000/kg and the yield per mu15 ~ 20kg; Shrimp seedlings of 60,000 ~ 6.5438+0.5cm per mu in autumn. (3) Feed feeding

The feed is mainly full-price compound feed. Feed/kloc-0 once a day before April, 11after April14: 00 ~15: 00; Feed twice a day from May to June 10, and the time is 7: 00 ~ 8: 00 and 17: 00 ~ 18: 00 respectively. The daily feeding amount is 5% ~ 10% of the total shrimp in the pond, and the feeding amount once in the afternoon is 2/3 of the daily feeding amount. (4) Water quality and aquatic plant management

Before June, the pond water kept a certain degree of fertility and transparency of 30 ~ 40 cm, so as to cultivate zooplankton, accelerate the growth of freshwater shrimp and effectively prevent the occurrence of moss. In the peak season of shrimp growth, the water quality should be fresh, the transparency should be kept at about 40 cm, and the water is slightly light green. In the hot season from July to September, when the aquatic plants grow excessively, we should remove too many aquatic plants to keep the coverage rate of aquatic plants at 30% ~ 40%, so as to prevent too many aquatic plants and rotten grass from damaging the water quality and causing a large number of deaths of freshwater shrimps. (5) Disease control

Use 1 zinc sulfate or chlorine dioxide every 15 ~ 20 days before May and after1to prevent parasites and bacterial diseases; 10 May-June, use biological bacteria 1 time every 15 days to control water quality and prevent diseases. When the onset of freshwater shrimp is found, it should be treated in time. (6) Salvage and listing

From the first half of the year to the end of May and the end of June, cage fishing will be completed, and in September of the second half of the year, or bottom net or hand-drawn net fishing will be used in winter, and artificial fishing will be completed after the pool is drained.