How to weed prawns in rice fields

Breeding crayfish in rice fields is a production mode that combines planting and aquaculture organically. It makes use of the natural environment of rice fields and artificial ecosystem to cultivate both rice and crayfish. So, how to weed shrimp rice fields?

First, how to weed shrimp rice fields?

Shrimp rice fields generally do not need weeding, special cases require the use of low-toxic herbicides that have no effect on lobsters, such as spraying 60% butachlor 80ml / mu with 40 jin of water, while adding herbicide safety control agent Anfago, the water layer is kept at 2cm, and fresh water is poured in 24 hours after application.

Second, it is good to raise lobsters in rice fields.

1. Increase production and income. In general, rice fields with lobsters can increase production by 10-30% per 667 square meters, and lobster production can reach 250 kg-500 kg per 667 square meters.

two。 Weeding saves time. Lobsters in rice fields can eat wild weeds and aquatic organisms that consume fertilizer in the fields, but never eat rice seedlings, which not only saves the labor of weeding, but also eliminates mosquitoes and other larvae that harm human beings and animals.

3. Keep fat and gain weight. Lobster moving back and forth in rice, foraging can not only help paddy fields loosen soil, live water, ventilation, but also increase the amount of dissolved oxygen in field water, at the same time, through metabolism to discharge a large amount of feces, played a fattening effect.

Third, the choice of rice fields

To raise lobster in paddy fields, we should choose low-lying fields where only one crop of rice can be grown, but not summer grain and rape. We should choose rice fields with abundant water sources, convenient drainage and irrigation, no drought and flood, fresh water quality, no pollution, fertile soil, better loam, good water retention and plenty of sunshine. If it is planned to carry out intensive feeding, ditches 2-4 meters wide must be dug around the fields. For large rice fields, "well" ditches must be dug, with a width of 0.5-0.7 meters and a depth of 0.3-0.5 meters. The shrimp ditch with a depth of 1 meter is surrounded by ridges, so that the rice field can maintain a water depth of 0.3-0.7 meters.

Because crayfish are sensitive to pesticides, it is generally not recommended to use pesticides to control weeds when raising shrimp in rice fields.