应用生态学报2012，Vol.23Issue(4)：867-874,8.
南方红壤丘陵区不同土地利用方式下土壤有机碳分布特征及其与草本生物量的关系
Effects of land use type on the distribution of organic carbon in different sized soil particles and its relationships to herb biomass in hilly red soil region of South China
摘要
Abstract
The changes in organic carbon content in different sized soil particles under different land use patterns partly reflect the variation of soil carbon, being of significance in revealing the process of soil organic carbon cycle. Based on the long-term monitoring of soil erosion, and by the methods of soil particle size fractionation, this paper studied the effects of different land use types ( wasteland , pinewood land, and grassland) on the distribution of organic carbon content in different sized soil particles and its relationships to the herb biomass. Land use type and slope position had obvious effects on the organic carbon content in different sized soil particles, and the organic carbon content was in the order of grassland > pinewood land > wasteland. The proportion of the organic carbon in different sized soil particles was mainly depended on the land use type, and had little relationships with slope position. According to the analysis of the ratio of particle-associated organic carbon to mineral-associated organic carbon (POC/MOC) , the soil organic carbon in grassland was easily to be mineralized, whereas that in wasteland and pinewood land was relatively stable. On the slopes mainly in hilly red soil region, the soil organic carbon in sand fraction had great effects on herb biomass.关键词
红壤丘陵区/土壤粒径/土壤有机碳/草本生物量Key words
hilly red soil region/ soil particle size/ soil organic carbon/ herb biomass分类
生物科学引用本文复制引用
李忠武,郭旺,王晓燕,申卫平,张雪,陈晓琳,张越男..南方红壤丘陵区不同土地利用方式下土壤有机碳分布特征及其与草本生物量的关系[J].应用生态学报,2012,23(4):867-874,8.基金项目
国家自然科学基金项目(40971170),教育部新世纪人才项目(NCET-09-330)和湖南省自然科学基金项目(11JJ3041)资助. （40971170）
