六六六土壤处理,在不同浓度下,对小麦、水稻、大豆、棉花的出苗,生长,产量等均有不同的影响。小麦、水稻的安全浓度在1.2ppm 以下;大豆、棉花的安全浓度在2.4ppm 以下。在适量情况下,对上述作物有不同程度的刺激生长、提早成熟、增加产量的趋势。从四年的豆麦轮作试验中看出,土壤中六六六含量每年大约减少50%,并以白纹铜色金龟子幼虫进行生物测定得到进一步证明。 The treatment of 666 soil had different effects on the emergence, growth and yield of wheat, rice, soybean and cotton under different concentrations. The safe concentration of wheat and rice is below 1.2ppm; the safe concentration of soybean and cotton is below 2.4ppm. In the right amount of time, the above crops have different degrees of stimulation of growth, early maturity, increase the yield trend. According to the four-year trial of beans and wheat rotation, the content of BHC in soil is reduced by about 50% each year, which is further proved by the bioassay of white-bellied beetle larvae.