Pollution-free treatment and utilization method of straw in shrimp and rice co-culture

Abstract

The invention discloses a pollution-free treatment and utilization method of straw in shrimp and rice co-culture. The pollution-free treatment and utilization method comprises the following steps of only cutting off rice ears, and reserving residual rice stumps in a field block; cutting off the straw remained on the rice ears, and stacking the straw on the field block in piles; conducting rotary tillage on the field block every 6-8 m to obtain soil turning areas with the width of 5-6 m, and planting aquatic plants in the soil turning areas; feeding water to a pond in a graded manner to gradually decompose different parts of the rice stumps along with water level rise; and remaining the tops of the rice stumps on the water surface, and enabling the parts, above the water surface, of the rice stumps to gradually wither and fall into the pond. By means of the pollution-free treatment and utilization method, the straw decomposition speed can be reduced, the straw utilization rate is increased, and economic losses caused by crayfish death due to large changes of water quality are prevented.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a pollution-free treatment and utilization method of rice straw in shrimp-rice co-cropping. Background technique [0002] Shrimp-rice co-cropping is a farming model that combines planting and breeding, that is, raising crayfish in rice fields and planting a season of mid-season rice. During the rice planting period, crayfish and rice grow together in the rice fields. Specifically, broodstock shrimp are put in before the mid-rice harvest from August to September every year, or juvenile shrimp are put in after the mid-rice harvest from September to October, and adult shrimp are harvested from mid-April to late May in the second year, and supplementary feeding is also carried out at the same time. For juvenile shrimp, the field is pruned and transplanted at the end of May and early June, and broodstock or commercial shrimp are harvested in August and September. This ...

AI Technical Summary

Problems solved by technology

[0005] 1. The existing measures to keep straw in the field cannot reduce the rate of decay and decomposition of straw. The straw will decompose in a large amount in a short period of time, and it will not be able to continuously provide nutrients for the water body in the later stage, resulting in an extremely low utilization rate of straw

[0006] 2. The existing method of using straw makes the straw easy to concentrate and decompose, resulting in great changes in the water quality of the pond in a short period of time, causing stress and death of crayfish, and economic losses