草业学报2016，Vol.25Issue(8)：36-47,12.DOI:10.11686/cyxb2016057
不同利用方式对豫西黄土丘陵区土壤微生物生物量及群落结构特征的影响
Effects of land use on soil microbial biomass and community structure in the loess hill region of west Henan
摘要
Abstract
In order to uncover the effects of different land use systems on soil microbial biomass and community structure characteristics,we selected five land use types;woodland,shrub land,orchard,abandoned farmland and farmland.We analyzed soil phospholipid fatty acids (PLFAs).Compared with the farmland,woodland in-creased soil microbial biomass carbon (MBC)and microbial biomass nitrogen (MBN)content by 225.38% and 206.19% respectively (P <0.05)while the MBC/total organic carbon (TOC)and MBN/TN value increased by 2.89 and 5.05 respectively (P <0.05 ).Shrub land increased soil MBC and MBN content by 265.73% and 245.03% respectively (P <0.05),the MBC/TOC and MBN/TN value increased by 3.00 and 5.57 respectively (P <0.05 ).Orchard management increased soil MBC and MBN content and MBN/TN value by 107.80%, 84.99% and 1.23 respectively (P <0.05).There was no difference in MBC and MBN and microbial biomass phosphorus (MBP)between the abandoned farmland and farmland soil (P >0.05).Bacterial and fungal PLFA in woodland soil increased by 17.87% and 24.27% respectively compared to farmland (P <0.05 )while in shrub land these traits increased by 17.18% and 28.45% respectively (P <0.05).Orchard soil bacterial PLFA content was increased by 9.0% (P <0.05).Soil bacteria,fungi and actinomycetes PLFA in abandoned farm-land and farmland were similar (P >0.05).The Shannon diversity index and Pielou evenness index of wood-land and shrub land were significantly higher than other systems (P <0.05)while the Simpson dominance in-dex was significantly decreased (P <0.05).The PLFA content of soil bacteria,fungi,and actinomycetes was significantly,positively correlated with TOC,MBC,total nitrogen (TN),available nitrogen (AN),MBN and bulk density (BD)(P <0.05 or P <0.01).The results showed that compared with farmland,abandoned farm-land and orchard soil,soil microbial diversity of woodland and shrub land is enhanced;microbial species are u-niformly distributed and community structure is relatively stable.This indicates that woodland and shrub land are superior for improving soil quality and microbial community structure diversity.The input of nutrients and the change of soil structure caused by different land use patterns is one of the reasons for the change of microbi-al community structure.关键词
微生物量/微生物群落结构/黄土丘陵区Key words
microbial biomass/microbial community structure/loess hilly area引用本文复制引用
刘晶,赵燕,张巧明,徐少君..不同利用方式对豫西黄土丘陵区土壤微生物生物量及群落结构特征的影响[J].草业学报,2016,25(8):36-47,12.基金项目
国家自然科学基金项目（U1404322）和河南科技大学博士科研基金（09100687）资助。 （）
