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本文是作者于1978～1983年在黑龙江垦区大面积大豆田里应用氟乐灵灭草,并观察对大豆和后茬作物影响所进行的研究。探讨了不同用药量和土壤不同含水量对大豆生育、产量、根瘤生长、固氮酶活性的影响和土壤残留对后茬作物的毒害。每公顷施用1.0～2.5公斤有效量氟乐灵大豆出苗,出苗后的生育和根瘤的形成及其固氮活性均受到不同程度的抑制,大豆减产1.7～9.4%。田间施药后,虽然经过春、夏、秋、冬四季的十几个月时间,较高用药量对后茬作物小麦、玉米等仍有残留毒害作用,致使这些作物的生育受抑制,产量下降。最后对当前推广应用的氟乐灵剂量进行了商榷,对下茬作物安排及如何解决药剂对根瘤影响问题也进行了讨论。
This article is from 1978 to 1983 in Heilongjiang reclamation area of a large area of soybean fields with trifluralin weeds, and observe the effects of soybean and subsequent crop research. Effects of different dosages and different soil moisture contents on the fertility, yield, nodule growth and nitrogenase activity of soybean and the toxicity of soil residues to the following crops were discussed. The application of 1.0 ~ 2.5 kg per hectare of effective dose of trifluralin showed that seedling emergence and nodule formation and nitrogen fixation activity after emergence were all inhibited to some extent, and the yield of soybean reduced by 1.7-9.4%. After field application of pesticides, the higher doses of pesticides still have residual toxic effects on the following crops such as wheat and corn after a period of more than ten months of spring, summer, autumn and winter, causing the fertility of these crops to be inhibited and the yield decreased . At last, the dosage of trifluralin which is widely applied and discussed is discussed, and the arrangement of the next crop and how to solve the problem of the influence of the agent on nodules are also discussed.