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我省为寒温带大陆性气候,大豆生育前期受延迟性低温影响,生育后期受早霜影响,农时至关重要,药害、肥害、病害等均影响大豆的的生长发育,影响产量及品质。大豆对除草剂安全性要求高。目前除草剂药害是造成大豆低产,品质差,效益低的重要原因之一。除草剂药害可分两种:一种是内吸性药害,亦称内伤是隐性药害,此种除草剂可被大豆吸收,在大豆体内传导,低温水分大时,大豆代谢能力下降,造成药害。如:酰胺类除草剂尤其是低含量50%乙草胺大且表现为叶皱缩,
Cold-temperate continental climate in our province, the impact of delayed hypothermia in the early growth stage of soybean, frostbite during the late growth period, agricultural is crucial, phytotoxicity, fat damage, diseases and so affect soybean growth and development, affecting yield and quality. Soybeans have high requirements for herbicide safety. Herbicide phytotoxicity is one of the important reasons for low yield, poor quality and low benefit of soybean. Herbicide injury can be divided into two types: one is the internal absorption of phytotoxicity, also known as internal injury is a hidden phytotoxicity, this herbicide can be absorbed by soybeans, conduction in soybeans, low temperature and moisture, soybean metabolic capacity decreased , Resulting in injury. Such as: amide herbicides especially low content of 50% acetochlor large and showed leaf shrinkage,