中国农业科学2011，Vol.44Issue(15)：3162-3168,7.
茶园土壤团聚体中微生物量碳、氮的分布特征
Distribution Characteristics of Microbial Biomass Carbon and Nitrogen in Soil Aggregates Under Tea Plantation
摘要
Abstract
[Objective] The distribution of microbial biomass carbon and microbial biomass nitrogen in soil aggregates of tea planted area was studied on purpose to reflect the influence of tea plantation on soil aggregates and its nutrient cycling, which can provide evidence for coordinating regional land use and returning farmland to forest/tea project. [Method] On the basis of field investigation and laboratory analysis, abandoned land and eucalyptus plantation were selected as contrasts, distribution features of microbial biomass carbon and microbial biomass nitrogen in soil aggregates under tea plantation were studied. [Result] The content of soil aggregates organic carbon comparatively increased as soil aggregates particles diameter reduced. The maximum soil aggregates concentrated with organic carbon were found at <0.25 mm diameter under tea plantation, abandoned land and eucalyptus plantation. The content of soil aggregates microbial biomass carbon, microbial biomass nitrogen comparatively decreased when soil aggregates particle diameter reduced under tea plantation, abandoned land and eucalyptus plantation. The maximum microbial biomass carbon, microbial biomass nitrogen was found in the soil aggregates of 2-5 mm diameter under tea plantation. Except <0.25 mm aggregates, the contents of soil aggregate microbial biomass carbon, microbial biomass nitrogen under tea plantation were higher than abandoned land and eucalyptus plantation within the same aggregates particle diameter. Soil aggregates microbial quotient generally decreased along with soil aggregates particles reduced under tea plantation, abandoned land and eucalyptus plantation. The maximum soil aggregates microbial quotient was mainly in the 2-5 mm aggregates under tea plantation, its distribution pattern was similar to microbial biomass carbon and nitrogen. [Conclusion] The content of microbial biomass in teaplantation soil is more plentiful than in the contrast.especially for large aggregates.which shows that conversion of farmland to tea plantation is a relatively ideal model of set-aside patterns in study area.关键词
土壤团聚体/微生物量碳/微生物量氮/微生物熵Key words
soil aggregates/ microbial biomass carbon/ microbial biomass nitrogen/ microbial quotient引用本文复制引用
刘敏英,郑子成,李廷轩..茶园土壤团聚体中微生物量碳、氮的分布特征[J].中国农业科学,2011,44(15):3162-3168,7.基金项目
国家自然科学基金(40901138)、国家科技支撑计划子课题(200813AD981303)、地表过程与资源生态国家重点实验室开放基金((2008-KF-05)、中国科学院山地灾害与地表过程重点实验室开放研究基金(2008)、四川省科技厅项目(2008JY0022) （40901138）
