海拔对高山峡谷区土壤微生物生物量和酶活性的影响

发布时间：2018-06-25 21:38

本文选题：土壤微生物生物量 + 土壤酶活性　；参考：《应用生态学报》2016年04期

【摘要】：为了解土壤微生物生物量和酶活性随海拔的变化特征,以川西海拔1563 m到3994 m的高山峡谷区的干旱河谷、干旱河谷-山地森林交错带、亚高山针叶林、高山森林和高山草甸土壤为研究对象,采用原位培养法研究了5种不同海拔生态系统中有机层(0~15 cm)和矿质层(15~30 cm)土壤微生物生物量碳氮、土壤蔗糖酶、脲酶及酸性磷酸酶活性的变化.结果表明:有机层土壤中微生物生物量碳氮和3种土壤酶活性呈现出先增加后减少再增加的变化特征,从2158 m开始不断增加,到3028 m左右达到峰值后减少,在3593 m出现最小值后,逆势增加直到3994 m后再次减少;矿质层土壤的微生物生物量碳氮和3种土壤酶活性表现为亚高山针叶林(3028 m)高山草甸(3994 m)干旱河谷-山地森林交错带(2158 m)高山森林(3593 m)干旱河谷(1563 m).各海拔梯度土壤有机层的微生物生物量和酶活性显著高于矿质层.高山峡谷区土壤微生物生物量与土壤酶活性呈极显著正相关.土壤微生物生物量和土壤酶与土壤含水量、有机碳和全氮呈极显著正相关,土壤蔗糖酶与土壤全磷含量呈极显著正相关,土壤酸性磷酸酶与土壤全磷和土壤温度呈极显著正相关.可见,高山峡谷区海拔变化引起的植被和其他环境因子的变化显著影响了土壤生化特性.
[Abstract]:In order to understand the changes of soil microbial biomass and enzyme activity with altitude , the changes of biomass carbon nitrogen , sucrose enzyme , urease and acid phosphatase activity in soil microbial biomass carbon , nitrogen , soil sucrose , urease and acid phosphatase in five different altitude ecosystems were studied by in - situ culture method . The results showed that the biomass carbon nitrogen and soil enzyme activity in the soil of the organic layer decreased and decreased again until 3994 m . The microbial biomass carbon nitrogen and three soil enzyme activities in the soil layer were as follows : subalpine coniferous forest ( 3028 m ) high mountain meadow ( 3994 m ) arid valley - mountain forest ( 2,158 m ) high mountain forest ( 3593 m ) arid valley ( 1563 m ) . Soil microbial biomass and soil enzyme activity were positively correlated with soil microbial biomass and soil enzyme activity . Soil microbial biomass and soil enzyme were positively correlated with soil water content , organic carbon and total nitrogen . Soil acid phosphatase was positively correlated with total phosphorus content in soil .
【作者单位】：四川农业大学生态林业研究所高山森林生态系统定位研究站;四川省长江上游生态安全协同创新中心;
【基金】：国家自然科学基金项目(31270498,31570445) 高等学校博士学科点专项科研基金项目(20135103110002)资助~~
【分类号】：S154

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