【摘要】 本文报道在实验室条件下,施用杀虫剂(呋喃丹)、杀菌剂(多菌灵)和除草剂(丁草胺)后,对黄松稻田土壤产甲烷菌数量和甲烷排放通量的影响。结果表明黄松稻田土壤产甲烷菌数量和甲烷排放通量范围分别为(0 84～42 14)×105cfu·g干土-1,(1 42～6 08)×10-6mol·g干土-1·d-1。低浓度的呋喃丹(1mg·kg干土-1)和丁草胺(1mg·kg干土-1)可增加黄松稻田土壤产甲烷菌种群数量和甲烷排放通量。但加入的呋喃丹、多菌灵和丁草胺量分别大于10mg·kg干土-1、5mg·kg干土-1和10mg·kg干土-1时,对产甲烷菌数量和甲烷排放通量呈现明显的抑制作用,7d时抑制作用最大,然后逐渐减轻,至28d时,基本恢复至对照水平。且加入量越大,农药在水稻田土壤中的滞溜时间也越长,对黄松稻田土壤产甲烷菌数量和甲烷排放通量的抑制作用越大。更多还原

【Abstract】 Effects of pesticidecontamination on the population of methanogens and the methane emission flux were investigated in Huangsong paddy soil developed from shallowsea deposit of intermediate lake deposit, off lied with insecticide (carbofuran), fungicide (carbendazim) and herbicide(butachlor) at different concentrations for 4 weeks The results showed that the population of methanogens and the methane emission flux in Huangsong paddy soil ranged (084～4214)×105 cells gdried soil-1 and (142～608) ×10-6 mol·g dried soil-1·d-1, respectively The population of methanogens and methane emission flux was stimulated slightly by adding carbofuran (1 mg·kg dried soil-1) or butachlor (1 mg·kg dried soil-1) in paddy soil, but significantly inhibited by adding of butachlor (10 mg·kg dried soil-1)?carbofuran (05 mg·kg dried soil-1) and carbendazim(10 mg·kg dried soil-1) in paddy soil At 7th day the inhibition reached the maximum and then gradually reduced down to the level in control Finally the applied pesticide or metabolites of pesticide might be beneficial to the population of methanogens and methane emission flux after 28 days更多还原