枯草芽孢杆菌对黑土中可培养微生物的生态效应  

Effect of Bacillus subtilis on Microbial Respiration and Urease Activity in Phaeozem

作　　者：魏海燕[1,2] 蔡磊明[1] 赵玉艳[1] 谭头云[1,2] 

机构地区：[1]沈阳化工研究院安评中心,沈阳110021 [2]新疆农业大学,乌鲁木齐830052

出　　处：《农药》2009年第2期111-113,共3页Agrochemicals

摘　　要：研究了微生物农药枯草芽孢杆菌对东北黑土中可培养微生物的生态影响。其动态变化表明:低质量分数枯草芽孢杆菌对细菌总数没有明显影响,较高质量分数枯草芽孢杆菌可促进细菌总数的显著增加,其中质量分数在3200mg/kg时,枯草芽孢杆菌对细菌的刺激强度最高,为对照的11倍。枯草芽孢杆菌对土壤中的放线菌也有刺激作用,刺激强度最高时,放线菌数量可增至对照的8.3倍左右。枯草芽孢杆菌对真菌的敏感性较低,只有质量分数高达3200mg/kg时,才对真菌产生明显刺激作用,最高刺激强度为同时期对照的29倍。The effects of Bacillus subtilis on microbial respiration and urease activity in phaeozem were studied by simulated methods in lab condition. The result showed that soil respiration was stimulated in the whole incubation process, the higher mass fraction the greater influence, high dose（3200 mg/kg dried soil）of Bacillus subtilis applied into phaeozem had significant stimulated effect on soil respiration at 42 d, stimulation ratio was 69.1%. Compared with control the activity of urease in soil treated with Bacillus subtilis（32-3200 mg/kg dried soil）was stimulated except the first day, high dose（3200 mg/kg dried soil）of Bacillus subtilis had significant stimulated effect on the activity of urease at 28 d, stimulation ratio was up to 101.1%.

关 键 词：枯草芽孢杆菌 微生物 生态效应 

分 类 号：S476.1[农业科学—农业昆虫与害虫防治]