论文部分内容阅读
林业生产中,采用化学除草是确保稳产、高产,行之有效的一项重要措施。自50年代以来,相继出现亚砷酸钠、芳草枯、百草枯、四氟丙酸钠、胺基三氮唑等多种化学除草剂。它们都有一定的除草效果,但这些药剂在土壤中会有残酎,并会妨碍作物的生长,毒性较高,且除草的品种和范围又并不广泛,因此在施用上受到一定限制。近年来人们致力于研制低毒、高效、广普性、在土壤中无残留的新型药剂,并将除草的重点放在消灭地下根系或根茎系统的多年生杂草。我院研制成功的镇草宁(N—膦酰甲基甘氨酸的二钠盐)即是属于符合上述
Forestry production, the use of chemical weeding is to ensure stable, high yield, effective an important measure. Since the 1950s, many chemical herbicides such as sodium arsenite, paraquat, paraquat, sodium tetrafluoropropionate and amino triazole have emerged. They all have a certain herbicidal effect. However, these pesticides have residual residues in the soil and can hinder crop growth. They are highly toxic and have a limited range of herbicides. Therefore, they are limited in application. In recent years, people are devoted to developing new drugs with low toxicity, high efficiency, broad generalization, and no residue in the soil, and weeding has been focused on eliminating perennial weeds in underground roots or rhizomes. Our hospital successfully developed town grass Ning (N-phosphonomethylglycine disodium salt) that is in line with the above