Herbicide can't replace cultivating

At present, the use of chemical herbicides in agricultural production has been basically popular. Some farmers have applied herbicides and thought that weeds have been removed, and there is no need to cultivate them. In fact, herbicides can only be weeded, instead of cultivating, cultivating, in addition to weeding, there are many other important roles.

One is to increase soil aeration. The cultivating of dry crops such as wheat, rapeseed and cotton can increase the aeration of the soil, increase the oxygen content in the soil, enhance the respiration of the crops, and enhance the absorption capacity of the roots, thereby growing lush.

The second is to increase the effective nutrient content of the soil. The organic matter and mineral nutrients in the soil must be decomposed by the soil microbes before they can be absorbed and utilized by the crops. When the soil is not ventilated and the oxygen in the soil is insufficient, the soil nutrients cannot be fully decomposed and released. After cultivating the loose soil, the soil microbes are active due to sufficient oxygen, which decomposes and releases the potential nutrients in the soil and improves the utilization of soil nutrients.

The third is to adjust the soil moisture content. When cultivating in drought, it can cut off the capillary of the surface layer of the soil, reduce the soil moisture transport to the soil surface and evaporate and lose, and improve the drought resistance of the soil.

The fourth is to increase soil temperature. The cultivating loose soil can loosen the soil, increase the light receiving area, enhance the absorption of solar radiation, weaken the heat dissipation capacity, and enable the heat to be quickly transmitted to the deep soil to increase the soil temperature.

The fifth is to suppress the length of the leader. When the vegetative growth of crops is too strong, deep cultivating can cut off some roots, control the absorption of nutrients, and suppress the length of the crop.

Six is ​​the combination of soil and fertilizer. In the paddy field, the fertilizer applied to the surface layer can be stirred to the bottom layer to achieve the purpose of mixing soil and fertilizer and mud. It can also eliminate harmful substances in the soil and prevent denitrification, promote the occurrence of new roots, improve absorption capacity and increase tillering.

Different crops have different tillage times after application of chemical herbicides. Dry soil such as rapeseed, wheat, cotton and soybean should be carried out 20 to 25 days after spraying. The paddy field should be carried out 12 days after application, otherwise the chemical weeding effect will be affected.