北方农牧交错带林地、耕地和草地土壤微生物群落结构特征的PLFA分析

被引：28

作者：

文倩 ^{[1
]}

林启美 ^{[1
]}

赵小蓉 ^{[1
]}

李贵桐 ^{[1
]}

赵沛一 ^{[2
]}

机构：

[1] 中国农业大学资源与环境学院

[2] 内蒙古自治区农牧科学院

来源：

土壤学报 | 2008年 / 02期

基金：

国家高技术研究发展计划(863计划);

关键词：

土壤微生物; 磷脂脂肪酸; 土地利用方式; 半干旱地区;

D O I：

暂无

中图分类号：

S154.3 [土壤微生物学];

学科分类号：

摘要：

从内蒙古武川县采集了林地、雨养耕地、灌溉耕地和草地等4个不同利用方式的土壤,研究了土壤微生物磷酯脂肪酸的分布特征。结果表明,土壤总脂肪酸含量19.8247.28ngg-1,以指示G-细菌的单烯脂肪酸和指示G+细菌的支链脂肪酸为主,其含量分别占脂肪酸总量的29%37%和15%20%,灌溉耕地和草地土壤明显高于林地和雨养耕地土壤,差异最大接近3倍。主成分分析表明,第一主成分(PC1)主要包括14∶03OH、cy19∶0、12∶0、br17∶0和18∶2ω9,12等直链及支链脂肪酸;第二主成分(PC2)包括16∶0、16∶1ω11、18∶1ω9、19∶0和a15∶0等不饱和及支链脂肪酸;灌溉耕地、雨养耕地、草地土壤有相似的微生物群落结构,与林地土壤有明显差异。

引用

页码：321 / 327

页数：7

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