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为了探讨常用除草剂氟磺胺草醚的土壤环境效应,在东北黑土区豆-麦地进行大田试验,研究施用氟磺胺草醚后土壤速效磷(AP)、碱解氮(AN)和有机质(OM)3种养分含量、土壤微生物数量和土壤中酶活性的变化。氟磺胺草醚施用后土壤AP和AN含量没有显著变化,施用后30 d OM含量显著增加,其余天数均下降;施用后15 d细菌、真菌数量分别增加351.61%和220.00%,之后均呈下降趋势;氟磺胺草醚施用后放线菌数量降低,75 d后减少68.47%;施用氟磺胺草醚,土壤脲酶活性在1 d、蛋白酶和过氧化物酶活性在15 d和45 d、过氧化氢酶活性在1、15、75 d后都显著降低,而转化酶活性没有显著变化。研究表明,氟磺胺草醚的施用对土壤OM含量、微生物数量及脲酶、蛋白酶、过氧化物酶、过氧化氢酶活性均有一定的抑制作用,而对AP、AN含量和转化酶活性没有显著影响。
In order to investigate the soil environmental effects of the commonly used herbicide fomesafen, field trials were conducted in beans-wheat fields in the black soil region of Northeast China to study the effects of soil available phosphorus (AP), available nitrogen (AN) and organic matter (OM) ) Three kinds of nutrient content, the amount of soil microorganisms and soil enzyme activity changes. The contents of AP and AN in soil did not change significantly after application of fomesafen, and the content of OM increased significantly on the 30th day after application, while the rest days decreased. After 15 days, the numbers of bacteria and fungi increased by 351.61% and 220.00%, respectively, ; The amount of actinomycetes decreased after fomesafen application and decreased by 68.47% after 75 days. The activity of soil urease was at 1 d and the activity of protease and peroxidase was 15 d and 45 d after treatment with fomesafen. Hydrogen peroxide Enzyme activity decreased significantly after 1, 15 and 75 days, but invertase activity did not change significantly. The results showed that the application of fomesafen inhibited the content of OM, the amount of microbes and the activities of urease, protease, peroxidase and catalase in soil, but had no significant effect on the contents of AP, AN and invertase influences.