With the development of the economy, the chemical weeding of farmland in China has entered a stage of rapid development. The use of herbicides is a key issue in their herbicidal effects. How to use the least amount of medicine to maximize the herbicidal effect has become a major issue in applied research. Herbicides are divided into soil treatment and stem and leaf treatment according to their different methods of use. The soil treatment agent is directly applied to the soil, and its efficacy is inevitably affected by soil factors. The influence of soil factors on the activity of herbicides has become a prerequisite for rational use of soil treatment agents, and many studies have been done at home and abroad. Among the soil factors such as soil texture, organic matter content, soil microbes and soil water content, soil water content is closely related to the dissolution, adsorption, leaching and microbial activities of herbicides, and is directly related to the activity of herbicides; soil moisture It has become an important factor affecting the efficacy of most soil treatment agents, and it is the main determinant of the efficacy of some species such as amides and sulfonylurea herbicides. The effects of various herbicides under different soil moisture conditions and how soil moisture affects the activity of herbicides have also been the subject of intensive research by weed scientists at home and abroad.
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