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目前,农民受市场经济杠杆拉力的影响,大豆种植面积逐年增加。为了防除田间杂草,减轻劳动强度,药剂除草面积越来越大。但随之而来的药害每年都有不同程度的发生,轻者影响大豆正常生长,重者造成缺苗断条,甚至出现全军覆灭的现象,严重影响大豆的产量和质量,降低了经济效益。通过实地调查,大豆发生药害的原因有如下几个方面:
At present, the peasants are affected by the leverage of the market economy and the soybean acreage is increasing year by year. In order to control weeds in the field, reduce labor intensity, herbicides larger and larger. However, the ensuing phytosanitary measures occur to varying degrees every year. The light affects the normal growth of soybean, the severe cause of seedling broken bar, and even the destruction of the army, seriously affecting the yield and quality of soybean and reducing the economic benefit. Through the field investigation, the causes of phytotoxicity in soybeans have the following aspects: