Processes affecting herbicide action in soil
Processes affecting herbicide action in soil
复制标题
影响土壤中除草剂作用的过程
DOI：
10.1002/ps.2780040211
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
J. Osgerby
中科院分区：
文献类型：
--
作者：
J. Osgerby
The main processes which affect herbicide action in soil are considered to be the extent to which the herbicide is adsorbed by soil particles, the rate of absorption of the herbicide solution by plant roots and the rate at which the herbicide is lost from the soil by decomposition, evaporation or leaching. An attempt is made to show how these factors are interrelated and the possible use of mathematical models to optimise the performance of herbicides is briefly discussed. 1. Introductian Most herbicides must be present as solutions in water within the soil before they can be absorbed by plant roots or germinating weed seeds, although a few are able to penetrate the plant system in the vapour phase. The processes which affect herbicidal action in the soil are therefore those processes which affect the availability of the herbicide to the plant as an aqueous solution. These include the adsorption of the herbicide by the soil particles, the water content of the soil, the chemical or microbiological decomposition of the herbicide and the rates of transport of the herbicide to and from the absorbing sites by leaching, diffusion and evaporation. The degree of interaction of a herbicide with an active site within the plant will generally depend on its rate of entry into the plant and the rate at which it is decomposed by the plant. The rate of entry is a function both of the concentration of the herbicide in the soil water and of the rate of absorption of water by the plant. A confused understanding of plant/herbicide interactions is inevitable if both of these factors are not taken into account. It is of course difficult enough to do this in glasshouse experiments, where the soil conditions can be carefully controlled. In the field, where the conditions are in a permanent state of flux, it is virtually impossible to assess the consequences of all interacting processes. However, attempts are being made in this direction with some limited success. 2. The process of adsorption
