论文部分内容阅读
我省小麦栽培面积7500万亩以上,是国内主要商品粮基地之一。近年来,随着耕作制度的改革,水肥条件的改善,发种频繁的更换,套种面积的扩大,加之农村劳力的大量输出,放松了麦田的耕作管理,导致麦田杂草猖獗发生,危害日趋严重。小麦产量一般受草害减产10—20％,严重的达30％以上。因此,控制麦田杂草危害,对提高小麦产量挽回损失具有大意义。 一、全省麦田杂草的种类及分布 麦田杂草的分布没有明显的生态分布界限。但由于各地的耕作栽培制度、水利条件、管理水平、土壤质地等
Wheat cultivation area of more than 7500 acres in our province, is one of the major commodity grain base. In recent years, along with the reform of farming system, the improvement of water and fertilizer conditions, the frequent replacement of seeds and seeds, the expansion of interplanting area and the large output of rural labors, the tillage management of wheat fields has been relaxed. As a result, weeds in the wheat fields have become rampant and harmed more and more . Wheat yield is generally reduced by 10-20% grass damage, a serious up to 30%. Therefore, the control of weed hazards in wheat fields, to improve the recovery of wheat yield loss of great significance. First, the province’s wheat weeds species and distribution Weed distribution There is no obvious ecological distribution limits. However, due to the cultivation and cultivation system around, water conservancy conditions, management level, soil texture and so on