摘要
本文研究了5种除草剂对两种土壤类型中微生物活性、土壤硝化和氨化作用的影响。结果表明;1.供试的5种除草剂在正常用量下,对土壤微生物总活性的影响不大,即使有影响也是暂时的,很快就会恢复。2.1000ppm时,几种除草剂对两种土壤的硝化作用有一定的抑制效果,对氨化作用有不同程度的促进作用。以上结果对于进一步研究如何筛选除草剂作硝化抑制剂,进而研制化肥—除草剂的混合剂型,提高化肥肥效,减少氮素损失与污染具有一定参考价值。
Effects of five herbicides on the microbial activity, nitrification and animo-nification in two soils were studied.The results showed that the herbicides had little effects on soil microbial activity when normal amounts were applied in the soils, if there was any effect, it was temporal and would recover very soon. The results also showed that when the concentration of herbicides in soils was 1000 ppm, soil nitrification rate was inhibited but soil ammonification rate was stimulated in certain levels.The results will be valuable for selecting suitable herbicides as soil nitrificatron inhibitors, producing new fertilizer and herbicide mixture, increasing the efficiencies of fertilizers, decreasing the loss of nitrogen fertilizer and controlling the pollution.
出处
《农村生态环境》
CSCD
1990年第3期62-66,共5页
Rural Eco-Environment
