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研究了单甲脒农药（DMAH）对大豆－土壤系统的生态影响．结果表明：除CK外，5个设置浓度［（DMAH）／mL·L－1］0．25、0．5、2．5、5.0、25均对大豆虫害有不同的防治效果．其中＞2．5时可防治大豆多种虫害；大豆对DMAH稀释液的pH值反应敏感，高浓度处理的叶片因酸度大而出现药害；推荐浓度［（DMAH）＝0．25mL·L－1］，对植株的生长和生理功能有促进作用．可使总生物量及产量分别增加20％左右，且籽粒中农药无残留，土壤农药残留量也小；当处理pH值＜5时会对叶片有伤害．生理功能被抑制，总生物量及产量都不如CK；DMAH在植物器官及土壤都有不同程度的残留量．其中叶残留量大于籽粒及土壤．可以认为，低浓度DMAH处理不会对植物－土壤系统造成污染．
The ecological effects of monoamidine pesticide (DMAH) on soybean-soil system were studied. The results showed that all the five concentrations [(DMAH) / mL·L-1] 0.25,0.5,2.5,5.0,25 had different control effects on soybean pests except CK. Among them,> 2.5 can prevent many kinds of pests in soybean; Soybean sensitive to the pH value of DMAH diluted solution, phytotoxicity occurred in leaves with high concentration due to acidity; recommended concentration [(DMAH) = 0.25mL·L- 1], the growth and physiological functions of plants have a catalytic role. Total biomass and yield could be increased by about 20% respectively. There was no pesticide residue in the grain and little pesticide residue in the soil. When the pH value was less than 5, the leaves would be harmed. Physiological functions were inhibited, total biomass and yield are not as CK; DMAH in plant organs and soil have varying degrees of residue. Leaf residue is larger than grain and soil. It is believed that low concentration DMAH treatment does not cause any contamination of the plant-soil system.