A new planting and breeding method for shrimp and rice rotation

Abstract

The invention discloses a novel crayfish and rice rotation breeding and planting method. The method comprises the following steps: a crayfish fry pond and a breeding pond are built separately in the area ratio being 1:(4-10). Seed crayfish are put into the crayfish fry pond, and after crayfish fries are bred, the crayfish fries in the consistent specification (60-70 crayfish per jin) are caught and then put into the breeding pond in the density of 5,000-8,000 crayfish per mu. After the crayfish fries in the breeding pond grow to be 20 g or above, the crayfish fries are caught in a catch rotation manner that only large crayfish fries are caught, then crayfish fries are caught from the crayfish fry pond and put into the breeding pond after the large crayfish fries in the breeding pond are caught, and accordingly, the breeding density of the breeding pond keeps unchanged. After all the crayfish fries are almost caught, rice is planted in the breeding pond in the traditional planting density. The breeding density of crayfish can be well controlled, burst of diseases caused by high breeding density of the crayfish is avoided, and finally, high-quality commodity crayfish are obtained. The utilization rate of land is increased in the manner of catching and stocking rotation, and better benefits are obtained.

Description

technical field [0001] The invention relates to planting and breeding technology, in particular to a novel planting and breeding method for shrimp and rice rotation. Background technique [0002] With the improvement of living standards, the market demand for high-quality crayfish is increasing, and the price is also rising. However, the traditional shrimp-rice co-cropping technology mainly adopts the mode of feeding shrimps in autumn. In actual production operations, its disadvantages are becoming more and more obvious. The main points are as follows: 1. The density of shrimp seedlings cannot be controlled, and outbreaks are easy disease. Putting shrimps in early autumn, if the survival rate of the shrimps is high, the density of the shrimp seedlings in the later stage will be very high, causing the shrimps to eat more and grow slowly, especially after the beginning of May, when the water temperature rises, the activity of the shrimps increases, and the food intake increas...

AI Technical Summary

Problems solved by technology

In addition, because the density is too high, the shrimp will be stressed and mature prematurely. It will only eat but not grow.

Second, the specifications of shrimp fry are uneven, and it is difficult for commercial shrimp to be listed in batches

Due to the differences in the individual development of the species of shrimp, it is difficult to synchronize the spawning of the species of shrimp, resulting in inconsistent specifications of the shrimp seedlings. Shrimp are injured or disabled or even die, which will affect the overall efficiency

3. The traditional shrimp-rice co-cropping has the problem of competition for space between shrimp and rice in order to provide enough space for the shrimp to move. The planting density of rice in the shrimp-rice co-cropping is only 67% of the traditional rice planting density, which affects the overall Rice yield, lower economic benefits

Fourth, in the process of transforming rice fields in the traditional co-cropping of shrimp and rice, it is generally adopted to excavate a large ring ditch with a depth of 3 to 4 meters and a depth of 1.5 meters, resulting in relatively large engineering costs and increased breeding costs.

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