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化学封闭除草技术已被普遍应用,已成为当前不可替代的田间除草措施。近年来,除草效果并不理想,不同年份化学除草率平均在70%以下,对除草率低的地块,进行二次除草,增加了除草成本。土壤、气候是影响除草效果的主要因素,人为因素也不可忽视。1影响因素1.1土壤条件1.1.1土壤有机质土壤有机质含量高低,对除草剂的除草效果影响较大。有机质含量高的土壤,土壤黏粒多,黏粒对除草剂分子吸附数量增加,降低除草效果。1.1.2整地质量整地粗放,坷垃粒径大、数量多,残留的秸秆、杂
Chemical closed weeding technology has been widely used, has become the current irreplaceable field weeding measures. In recent years, weeding effect is not ideal, in different years, the average chemical weeding rate below 70%, on the low weed rate of the second weeding, increased weeding costs. Soil and climate are the main factors affecting the weeding effect, and human factors can not be neglected. 1 influencing factors 1.1 soil conditions 1.1.1 soil organic matter Soil organic matter content of high and low herbicides on the weeding effect. In soils with high organic matter content, there are more clay and more clay particles adsorbed on the herbicides, reducing the weeding effect. 1.1.2 site preparation quality of land preparation rough, Kilburn large particle size, the number of residues of straw, miscellaneous