CN104885975B - The method of building inner ridges under the co-cropping mode of shrimp and rice - Google Patents

Description

The method of building inner ridges under the co-cropping mode of shrimp and rice

technical field

The invention relates to crayfish breeding technology, and more specifically relates to a method for building inner ridges under the co-production mode of shrimp and rice.

Background technique

Crayfish originated in North America, commonly known as freshwater crayfish, in terms of classification, it belongs to the crustacea Arthropoda. In recent years, crayfish farming has grown rapidly across the country, especially in the Sihu area of Hubei, where paddy field farming of crayfish has become a local characteristic industry. At present, there are two types of shrimp farming in paddy fields: open-enclosed ditch and non-enclosed ditch. Because the crayfish yield is high and easy to catch, the promotion effect is better. Enclosing ditch refers to the ditch excavated around the paddy field with a depth of 1-1.5 meters and a width of 3-4 meters, which is mainly used for raising shrimp. When the inner ridge is not built, since the ditch and the water surface in the field are connected, it is easy to cause the paddy field soil to silt into the enclosure ditch, especially during the rice cultivation period, a large amount of soil pours into the enclosure ditch from the paddy field, which not only causes siltation, but also It will also have adverse effects on the growth of fish and shrimp in the ditch.

Contents of the invention

The purpose of the present invention is to propose a method for building inner ridges under the cooperative mode of shrimp and rice, so that the water surface of the breeding ditch and the water surface of the paddy field can be manually isolated and controlled, which is beneficial to paddy field farming operations and water and fertilizer management.

In order to achieve the above purpose, the following technical solutions are adopted:

The method of building the inner ridge under the co-cropping mode of shrimp and rice, the steps are as follows:

A. Build a ridge along the enclosure ditch in a paddy field with an enclosure ditch. The height of the ridge is 25-35 cm, the width of the bottom of the ridge is 40-50 cm, and the paddy field is circled. The outer edge of the ridge is 40-50 cm from the inner edge of the enclosure ditch;

B. The soil for building the ridge comes from the outside of the ridge, and the surface soil with a thickness of 20-30 cm is taken on the outer field surface for building the ridge;

C. When it is necessary to dry the field during the rice growing season, open a drainage outlet on the inner ridge, and use drainage and irrigation equipment to make the water level in the enclosure ditch 20cm lower than the field surface. When fertilizing rice, the drainage outlet on the inner ridge must be blocked , so as not to lose fertilizer into the ditch;

D. Irrigate deep water after harvesting of middle rice or late rice, so that the water surface is more than 10cm higher than the inner ridge, and crayfish can be cultured on the entire field surface. The inner ridge will be reinforced once next year before transplanting the rice in the next season to prevent leakage.

Compared with the prior art, the present invention has the following beneficial effects:

When the inner ridge is not built, since the ditch and the water surface of the rice field are connected, it is easy to cause the paddy field soil to silt into the enclosure ditch, especially during the rice plowing period, a large amount of soil pours into the enclosure ditch from the paddy field, which not only causes siltation, but also affects the The growth of fish and shrimp in the ditch will also cause adverse effects.

By building a ridge close to the breeding ditch in the paddy field, the breeding ditch is separated from the water surface of the paddy field under manual control, which is conducive to paddy field farming operations and water and fertilizer management, improves water and fertilizer utilization efficiency, reduces non-point source pollution, and can provide more water for crayfish. Good growing environment.

Specific implementation method

The method of building the inner ridge under the co-cropping mode of shrimp and rice, the steps are as follows:

Build a ridge along the enclosure ditch in a rice field with an enclosure ditch, the height of the ridge is 25-35 cm, the width of the bottom of the ridge is 40-50 cm, and the paddy field is circled, and the outer edge of the ridge is 40-50 cm from the inner edge of the enclosure ditch;

The soil for building the ridge is mainly from the outside of the ridge, and 20-30cm thick surface soil is taken from the outer surface of the field to build the ridge;

When it is necessary to dry the field during the rice growing season, open a drainage outlet on the inner ridge, and use drainage and irrigation equipment to make the water level in the enclosure ditch 20 cm lower than the field surface. When fertilizing rice, the drainage outlet on the inner ridge must be blocked to avoid Fertilizers run off into ditches;

Irrigate deep water after the harvest of middle or late rice, so that the water surface is more than 10cm higher than the inner ridge, and crayfish can be cultured on the entire field surface. The inner ridge will be reinforced once next year before transplanting the rice in the next season to prevent leakage.

Claims (1)

1. enclosing ridge building method under the common operation mode of shrimp rice, step is as follows：

A, in the rice field for having culture in enclosure ditch along culture in enclosure ditch ridge building, the high 25-35 cm in the ridge, ridge bottom width 40-50cm, around rice field one week, the ridge Outer away from culture in enclosure ditch inward flange 40-50cm；

B, the soil of ridge building take the thick topsoils of 20-30cm to be used for ridge building from ridge outside in outside field face；

When C, paddy growth season need dry field, begin to rehearse the mouth of a river on the interior ridge, and makes the water surface in culture in enclosure ditch by drainage and irrigation equipment Less than more than field face 20cm, in fertilization of rice, it is necessary to which the discharge outlet on the interior ridge is blocked, in case fertilizer loss is into ditch；

D, after semilate rice or late rice harvesting deep water is filled, the water surface is enclosed more than ridge 10cm higher than interior, whole field face can cultivate small dragon Shrimp, next year reinforces on the interior ridge of enclosing once before lower season rice transplanting, prevents seepage.