What weeding methods are there in the field?

(1) rotation control. Different crops often have their own accompanying weeds or parasitic weeds, and the habitats required by these weeds are very similar to those of crops. If the crops are rotated and their habitats are changed, the harm of weeds can be significantly reduced.

(2) Select seeds.

(3) Applying decomposed farmyard manure.

(4) Remove weeds from fields, roadsides and ditches. Especially before the seeds mature.

(5) Reasonable close planting and grass control.

(6) The water layer is flooded.

2, mechanical control (hand tools, mechanical tools)

(1) Deep tillage. This is one of the effective methods to control perennial weeds. After repeated tillage, the number of perennial weeds decreased or their growth decreased, thus being controlled. Faster and better for annual weeds. At the same time, through deep ploughing and airing, microbial activity is promoted, N in the air is fixed, and soil nutrition is increased.

The soil should be thawed before spring ploughing and spring sowing. It can effectively control overwintering weeds and weeds emerging in early spring, and at the same time, the weeds scattered on the soil surface in the previous year are deeply buried in the soil, so that they cannot germinate and emerge in that year. However, in the soil with a large number of weed seeds, the weed seeds buried deep in the soil may turn out of the surface, resulting in a large number of seedlings in that year. Therefore, the depth of spring ploughing is moderately shallow.

Plow the land. Post-harvest operation of summer crops. In June and August, the temperature is high and there is a lot of rain. Weeds can be buried in the soil, which not only increases nutrients, but also has a good weeding effect. Especially for perennial weeds propagated by rhizomes, their rhizomes can be cut off and turned out of the surface, making them lose their germination ability and die after being exposed to the wind, wind and sun. The injured rhizome was buried deep in the soil and suffocated after irrigation.

Homework after autumn ploughing and autumn harvest. From September to June, 65438+ 10, it can remove the residual grass, overwintering weeds and perennial weeds that appear in spring and summer, and the annual weeds can be removed before the seeds mature. If it is too late, the annual maturity will increase the number of weeds in the field.

(2) Tillage, less tillage and no tillage. In the near future, they can keep weed seeds on the soil surface to increase the chances of emergence, and then focus on prevention and control through farming or chemical removal. In the long run, it can reduce the infection degree of weed seeds in soil, prevent deep seeds from being unearthed, reduce soil erosion and play a dual role in soil and water conservation and weed control.

(3) Tillage and intertillage before sowing.