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中国农学通报

中国农学通报 ›› 2006, Vol. 22 ›› Issue (1): 185-185.

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不同利用方式下棕壤及其各级微团聚体中微生物量碳、氮的变化

杨 坤,陈佳广,关连珠,于 菲,周永平,颜 丽   

  • 出版日期:2006-01-05 发布日期:2006-01-05

The Changes of Microbial Biomass C, N in Brown Soil and Several Different Particle Fractions of Microaggregates Extracted from It of Different Land Use Types

Yang Kun, Chen Jiaguang, Guan Lianzhu, Yu Fei, Zhou Yongping, Yan Li   

  • Online:2006-01-05 Published:2006-01-05

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摘要： 采用熏蒸-提取法研究了耕地、园地、林地三种利用方式下棕壤及其各级微团聚体中微生物量碳、氮的变化。研究结果表明：（1）不同利用方式下棕壤微生物量碳、氮的变化趋势均为<10μm微团聚体>原土>10~50μm微团聚体>50~250μm微团聚体，且经方差分析可知，除原土与10~50μm微团聚体中微生物量氮含量差异不显著外，均达到显著或极显著水平。不同利用方式之间微生物量碳、氮含量为林地>园地>耕地，土地利用方式对微生物量碳、氮含量有极显著的影响。（2）微生物量碳/有机碳、微生物量氮/全氮的比值表现为原土及<10μm、10~50μm微团聚体中均为林地最低，不同利用方式下土壤有机质输入的质的差别造成了这一结果。

Abstract: Soil microbial biomass C, N in brown soil and several different particle fractions of microaggregates extracted from it of different land use types were studied with the fumigation-extraction method. The results show: (1) The contents of microbial biomass C, N in brown soil keep in the same trend, <10μm >the original soil>10~50μm>50~250μm. With multiple comparison of it, except the difference between the original soil with the 10~50μm microaggregates, others difference is obvious evidently. Soil microbial biomass C, N in forestland is the highest, which in cultivated land is the lowest. The effects of the different land use types to the contents of microbial biomass C, N were significant. (2) The ratios of BC/TC and BN/TN of original soil, <10μm, 10~50μm in natural forest was lowest. The organic matter input of different land use types is difference of qualities, which cause the result.