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退化生态系统植被恢复过程中土壤微生物群落活性响应
引用本文:毕江涛,贺达汉,黄泽勇,杨磊,马巧荣.退化生态系统植被恢复过程中土壤微生物群落活性响应[J].水土保持学报,2008,22(4).
作者姓名:毕江涛  贺达汉  黄泽勇  杨磊  马巧荣
作者单位:1. 宁夏大学农学院,宁夏,银川,750021;宁夏农业技术推广总站,宁夏,银川,750001
2. 宁夏大学农学院,宁夏,银川,750021
3. 宁夏林业局生态保护中心,宁夏,银川,750001
基金项目:宁夏人事厅出国留学人员科研活动资助项目
摘    要:通过分析退化生态系统中主要植被恢复类型对土壤微生物群落活性的影响,探讨敏感和可靠的微生物群落活性响应指标,揭示适合当地生态条件的植被恢复类型。结果表明,沙米荒地、白沙蒿、柠条、沙冬青和人工乔木林地土壤微生物量C,N,P和微生物商、蔗糖酶、脲酶、过氧化氢酶、碱性磷酸酶均表现出显著差异(P<0.05)。在土壤各层内,除上层人工乔木林地土壤微生物量N相对较高外,柠条恢复草地土壤微生物量C,N,P都相对较高,沙米荒地均较低;土壤微生物商没有明显的趋势;人工乔木林地蔗糖酶和柠条恢复草地脲酶活性相对较高,过氧化氢酶和碱性磷酸酶活性没有明显的变化趋势,沙米荒地的蔗糖酶、脲酶和过氧化氢酶活性以及白沙蒿草地碱性磷酸酶活性较低。方差分析(ANOVA)显示,蔗糖酶、脲酶、过氧化氢酶和碱性磷酸酶与土壤有机质、全氮以及微生物量C,N,P之间呈显著相关关系;主成分分析(PCA)表明,土壤微生物量N,C,P和蔗糖酶、土壤微生物商基本反映了研究区植被恢复中土壤微生物群落活性的响应信息。不同植被恢复类型草地中土壤微生物群落活性的变化表明,柠条和人工乔木林是研究区域内适合当地生态条件的植被恢复类型。

关 键 词:退化生态系统  土壤微生物活性  植被恢复

Response of Soil Microbial Community Activity to Vegetation Restoration in Degraded Ecological System
BI Jiang-tao,HE Da-han,HUANG Ze-yong,YANG Lei,MA Qiao-rong.Response of Soil Microbial Community Activity to Vegetation Restoration in Degraded Ecological System[J].Journal of Soil and Water Conservation,2008,22(4).
Authors:BI Jiang-tao  HE Da-han  HUANG Ze-yong  YANG Lei  MA Qiao-rong
Abstract:To study effects of different restored vegetations on soil microbial community activities in a degraded ecological system,and probe into the sensitive and reliable indicating index for revealing suitable vegetations in local ecological conditions.The results showed that soil microbial biomass C,N,P and soil microbial quotient,soil enzymes such as sucrase,urease,catalase and alkaline phosphatase were significantly different(P<0.05) in the restored Agriophyllum squarrosum,Artemisia sphaerocephala kasch,Caragana korshinskii,Ammopiptanthus mongolicus and artificial arbor(Pinaceae sylvestris L.Var.mongolicus Litv.mixed with Robinia pseudoacacia L.) stands.In soil profile,soil microbial biomass C,P and N in Caragana korshinskii stand were relatively high except for soil microbial biomass N at upper soil layer in artificial arbor stand,and they were low in Agriophyllum squarrosum stand;soil microbial quotient didn't have obvious trend in the restored vegetations stands.Activities of sucrase in artificial arbor stand and urease in Caragana korshinskii stand were relatively high,the activities of catalase and alkaline phosphatase also didn't have regular trends,and the activities of sucrase,urease and catalase were relatively low in Agriophyllum squarrosum stand and so was the activity of alkaline phosphatase in Artemisia sphaerocephala kasch stand.Analysis of variance(ANOVA) explained that the relations between tested soil enzymes,soil organic matter and soil total N and soil microbial biomass C,N,P was closely correlated,principal component analysis indicated that soil microbial biomass C,N,P,sucrase and soil microbial quotient expressed the main information on the response of soil microbial community activities to the restored vegetation in studied area.From the changes of soil microbial community activites in the restored vegetation stands it is indicated that Caragana korshinskii and artificial arbor are suitable vegetation restoration types to local ecological conditions.
Keywords:degraded ecological system  soil microbial community activity  vegetation restoration
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