论文部分内容阅读
淮北是江苏省主要产麦区,常年实播面积2500万亩以上,占总耕地面积的60％左右,其中潮土类麦田约1500万亩(包括沙土、壤土及两合土),占麦田面积的60％左右。多年调查结果表明,这类土壤是荠菜的主要嗜生场所。据不完全统计,常年荠菜发生面积达1000万亩以上,造成小麦减产4～5亿斤,损失近亿元。为了探讨有效防除麦田荠菜的途径,笔者从1983年起,利用常规除草剂混配、不同生育期施药等方法,系统研究了不同条件下的防除效果,以期为大面积推广麦田荠菜的化除技术提供依据。
Huaibei is the main producing area in Jiangsu Province. The perennial planting area is more than 25 million mu, accounting for about 60% of the total cultivated land area, of which about 15 million mu (including sandy soil, loam and loamy soil) Of the 60% or so. Years of investigation have shown that such soil is the main place of habitat for shepherd’s purse. According to incomplete statistics, perennial shepherd’s purse occurs in an area of more than 10 million mu, resulting in a wheat yield reduction of 4 to 5 billion jin and a loss of nearly 100 million yuan. In order to explore the effective way to control the shepherd’s pursee in wheat field, the author studied the control effect under different conditions by using the methods of conventional herbicide mixing and spraying at different growth stages since 1983, in order to promote the removal of shepherd’s pursee Technology provides the basis.