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作者于1981～1983年所作的系统田间与盆栽试验证明,二硝基苯胺类除草剂中的氟乐灵、二甲戊乐灵对大豆苗期生育有明显抑制作用,表现为:(1)出苗延迟,幼芽下胚轴肿胀、脆弱、矮化,子叶革质状,单位面积用药量对幼芽矮化的影响比混土深浅大;(2)侧根显著受抑制,这种抑制作用局限于药土层,混土深度对大豆侧根的抑制比用药量高低的影响更显著;(3)根瘤菌形成受抑制,根瘤数减少,叶面积减小。随着大豆生长,上述抑制作用逐步消失,对大豆产量无显著影响。在供试3种除草剂中,丁乐灵对大豆生育无影响。从安全、经济、高效考虑,氟乐灵与二甲戊乐灵的适宜用量为1.0公斤,丁乐灵为1.5公斤/公顷,将药剂施于大豆种子之上的土层为宜,亦即施药后耙地不宜过深,将药剂混拌于0～6厘米土层为佳。
The systematic field and pot experiments conducted by the author from 1981 to 1983 demonstrated that trifluralin and pendimethalin in dinitroaniline herbicides significantly inhibited the growth of soybean at seedling stage as follows: (1) emergence Delayed, shoot hypocotyl swelling, fragile, dwarf, cotyledon leather quality, dwarf per unit area of dwarfing dwarfing than mixed depth; (2) lateral root was significantly inhibited, this inhibition is limited to The effect of soil depth and depth of mixed soil on lateral root of soybean was more significant than that of medicinal quantity. (3) Rhizobium was inhibited and the number of nodules decreased and leaf area decreased. With the growth of soybean, the inhibition gradually disappeared, no significant impact on soybean yield. Among the three herbicides tested, tetralox had no effect on soybean fertility. In terms of safety, economy and efficiency, the appropriate dosage of trifluralin and pendimethalin is 1.0 kg and tetraplor at 1.5 kg / ha. It is advisable to apply the agent to the soil layer above the soybean seeds After rake should not be too deep medicine, the drug mixed in 0 to 6 cm soil layer is better.