Soil-improving and efficiency-increasing method for co-cultivating rice and crayfish

Abstract

The invention relates to a soil-improving and efficiency-increasing method for co-cultivating rice and crayfish. The method includes: furrow type water management is adopted during rice planting; fertilizer application is reduced during rice planting, the application quantity of N is 4-8kg / mu, the nitrogen fertilizer is applied in three times to serve as the base fertilizer, tiller fertilizer andearing fertilizer, the application quantity of the base fertilizer and the tiller fertilizer accounts for the total application quantity of N, phosphorus fertilizer and potassium fertilizer are only applied when the base fertilizer is applied, the application quantity of P2O5 is 3-5kg / mu, and the application quantity of K2O is 5-8kg / mu; regulating cultivation furrow water level to promote the crayfish to make holes in a time division and layering manner, and cultivation furrow water can be used as the compensation fertilizer of rice planting. The method has the advantages that the furrow typefield structure, the rice and crayfish co-cultivation, the fertilizer application reduction and the cultivation furrow water serving as the supplementary fertilizer are used in a coordinated manner, rice field soil breathability can be improved, fertilizer cost can be reduced, fertilizer utilization efficiency can be increased, rice field non-point source pollution can be reduced, and the rice soil environment can be improved; the cultivation furrow water level is regulated to promote the crayfish to make holes for reproduction in a time division and layering manner, the centralized young crayfish emergence problem in the next year can be avoided, and crayfish yield can be increased effectively.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and in particular relates to a method for improving soil, increasing yield and increasing efficiency by co-cropping rice and shrimp. Background technique [0002] The rice-shrimp co-cropping model is one of the many models in the rice field farming system. It is based on rice planting, combined with the rice field ecosystem of freshwater economic farming, and uses the rice field production technology to realize the full and efficient use of light, temperature, and water in the rice field. The goal of water, soil and other resources. This model organically combines aquaculture and planting. It can not only reduce the amount of chemical fertilizers and pesticides, but also solve the problem of agricultural non-point source pollution. Experience is provided. [0003] The rice-shrimp co-cropping system is in a state of flooding for a long time, and the rice field soil is under reduci...

AI Technical Summary

Problems solved by technology

On the one hand, this destroys the ecological environment of the rice field, which is not conducive to the growth of rice. On the other hand, the increase in feeding leads to an increase in nitrogen and phosphorus nutrients in the water body, and frequent drainage and irrigation of the water body in the rice field increases agricultural non-point source pollution, resulting in a decrease in fertilizer and water use efficiency and environmental pressure. increase

In addition, in order to increase the output of crayfish, farmers increase inputs such as feed and water-improving agents, which will result in higher economic risks.