论文部分内容阅读
小麦的种植在我国的时间很长,其种植面积和总产量仅次于水稻,年种植面积有3000多万hm2,约合4.5亿亩,占全国耕地面积的22%~30%和粮食作物播种面积的20%~27%,在种植过程中由于麦田杂草通过与小麦争夺水分、养分、侵占生态空间以及作为一些麦田病虫害的越冬载体和中间寄主等直接或间接影响着小麦的产量和品质。因此为杀灭杂草农田应用化学除草剂已经成为一种重要手段,实践证明省工、省时、省力又高效的方法。但在最近几年的生产中发现有关杂草
The cultivation of wheat takes a long time in our country, its planting area and total output are second only to that of rice, and the annual planting area is more than 30 million hm2, accounting for about 450 million mu, accounting for 22% ~ 30% of the national cultivated land and sowing of food crops Area of 20% to 27%, in the process of planting wheat weeds by competing with wheat for water, nutrients, occupy ecological space and as some of the pests and diseases of the winter carrier and intermediate host directly or indirectly affect the yield and quality of wheat. Therefore, the application of chemical herbicides to kill weeds in farmland has become an important method, which has proven to be a labor-saving, time-saving, labor-saving and highly efficient method. But in recent years the production of weeds found