旅大市轻化工研究所研制的土壤硝化抑制剂2-氯-6(三氯甲丛)吡啶(我国统称氮肥增效剂CP)。1970年开始在旅大地区作农田试验,发现它对大豆、花生、甘薯等产生药害。为此,旅大市农科所、青海农科院、东北农学院等单位先后作了专门试验[1、2]。试验结果均表 Lvshuang Institute of Light Chemical developed soil nitrification inhibitor 2-chloro-6 (trichloromethyl plex) pyridine (China collectively referred to as nitrogen synergist CP). 1970 began in the Luda area for field experiments and found that it on soybean, peanut, sweet potato and other phytotoxicity. To this end, Luda Agricultural Science Institute, Qinghai Academy of Agricultural Sciences, Northeast Agricultural College and other units have made a special test [1,2]. The test results are table