Suitable for rice shrimp culture rice herbicide

In recent years, shrimp culture in rice field is a popular culture project, which makes use of the natural environment of rice field and artificial ecosystem to cultivate both rice and crayfish. So, what is the rice herbicide suitable for rice shrimp culture?

First, what is the rice herbicide suitable for rice shrimp culture?

Shrimp rice fields need to use low-toxic herbicides that have no effect on lobsters, which can be sprayed with 60% butachlor 80ml 100ml and 40 jin of water, while adding herbicide safety control agent Anfago, the water layer is kept at 2cm, and then poured into new water after 24 hours of application.

2. Techniques of raising Shrimp in Paddy Field

1. Build shrimp fields

Select fields with good water quality, sufficient water quantity, no pollution sources around, strong water conservation capacity, convenient drainage and irrigation, and no flooded fields to raise shrimp in rice fields, with an area of as little as a few mu to dozens or hundreds of mu. An anti-escape wall is built around the field with plastic film, cement board, asbestos tiles or calcium plastic board to prevent crayfish from escaping.

2. Shrimp fry restocking

Test the water before stocking, and only after it is safe can you release shrimp. There are two release times for crayfish: one is to put the species directly into the rice field in early September after the rice harvest and let it reproduce on its own. According to the actual situation of rice field culture, generally 20 kilograms of crayfish are released per mu, with a female-to-male ratio of 3:1. Second, after rice seedlings were planted in May, the larval shrimp with specifications of 2-4 cm were put into 1500k / mu or 30kg / mu.

3. Daily management

Patrol the fields every morning and evening, and observe the changes of water color and the activity, eating and growth of shrimp in the ditch. Field management is mainly focused on rice field drying, drug use and escape prevention. The rice should be roasted lightly and the water should not be drained completely. The water level can be lowered to the surface of the field, and the time should be short. If an abnormal response is found in the crayfish, it is necessary to inject water immediately.

4. Feeding and management

The basic fertilizer of crayfish in rice field should be sufficient, and the rotten organic fertilizer should be applied into the tillage layer before transplanting, so as to achieve the purpose of long-term fertility. Topdressing is usually once a month, urea 5 kg / mu, compound fertilizer 10 kg / mu. Raising shrimp in rice fields generally does not require feeding, and some animal feed, such as hammered snails, mussels and scraps of the slaughterhouse, can be fed appropriately during the peak growing season of crayfish.

5. Fishing

The crayfish that meet the commercial specifications will be sold on the market, and those that do not meet the specifications will continue to be cultured in the rice fields, so as to reduce the density of crayfish in the rice fields and promote the rapid growth of crayfish. From the middle of May to the middle of July, shrimp cage and ground cage net were used to catch fish, and the effect was better. You can also use the net to copy back and forth in the shrimp ditch, and finally drain the water from the paddy field before cutting grain to catch all the shrimp. When the young shrimp are released from February to March, the fishing peak will be reached at 9 Mel / 10. The shrimp is released from September to October and generally enters the fishing peak period from May to June of the following year. Fishing is prohibited during the breeding season when catching large fish or keeping small ones.

Crayfish are very sensitive to many pesticides. The principle of raising shrimp in rice fields is not to use drugs firmly, and to choose pesticides and biological agents with high efficiency and low toxicity when drugs are needed. When applying pesticides, we should pay attention to strictly grasp the safe concentration of pesticides to ensure the safety of shrimp, should and require spraying on the leaves of rice, try not to spray into the water, and it is best to use the medicine in different areas.