江西农业大学学报2017，Vol.39Issue(4)：713-720,8.DOI:10.13836/j.jjau.2017093
不同类型毛竹林土壤团聚体 有机碳特征研究
The Characters of Soil Aggregate Organic Carbon under Different Types of Phyllostachys edulis Forest
摘要
Abstract
The soil aggregate characteristics under three stand types ( pure Moso bamboo forest,mixed for-est of Moso bamboo and broad-leaved tree,mixed forest of Moso bamboo and Chinese fir) were in Anfu,Jiangxi Province were analyzed including its distribution and organic carbon content,the relationship between soil ag-gregate organic carbon and soil total organic carbon,the contribution rate of soil aggregate organic carbon. The results showed that the distribution trend of soil aggregate contents decreased with the decrease of aggregate size.The order of soil aggregate contents of the>0.25 mm size group was that of the mixed forest of Moso bamboo and Chinese fir>that of the mixed forest of Moso bamboo and broad-leaved tree>that of the pure Moso bamboo forest.The content sequence of soil aggregate organic carbon was as follows:(2-1 mm)>(>5 mm)>(1-0.5 mm)>(5-2 mm)>(0.5-0.25 mm).The organic carbon aggregate of the size>0.25 mm of the mixed forest of Moso bamboo and broad-leaved tree was the highest(32.43 g/kg),and the next came that of the pure Moso bamboo forest(26.99 g/kg),the third was that of the mixed forest of Moso bamboo and Chinese fir(21.18 g/kg).The av-erage content of the organic carbon of the aggregate of the size>0.25 mm significantly decreased with increasing soil depth.There was a positive correlation between soil aggregate organic carbon and soil total organic carbon, and there was a significant positive correlation among aggregates of different sizes under different types of Moso bamboo forests.The contribution rates of soil aggregate organic carbon of the groups of the>5 mm and 2-5 mm sizes were from 47.74% to 75.60%.The sequence of contribution rates of soil aggregate organic carbon was that of the mixed forest of Moso bamboo and Chinese fir>that of the mixed forest of Moso bamboo and broad-leaved tree>that of the pure Moso bamboo forest,showing that mixed planting could help to improve carbon accumula-tion in big aggregate.The results could provide some scientific basis for Moso bamboo management in the sub-tropical region of China.关键词
毛竹林/不同类型/土壤团聚体/有机碳Key words
Phyllostachy edulis/different types/soil aggregate/soil organic carbon分类
农业科技引用本文复制引用
余林,徐海宁,肖复明,刘广路..不同类型毛竹林土壤团聚体 有机碳特征研究[J].江西农业大学学报,2017,39(4):713-720,8.基金项目
国家林业公益性行业专项( 201404408)和国家"十二五"科技支撑计划项目( 2012BAD23B04) Project supported by Special Fund for Forest Scientific Research in the Public Welfare(201404408) and Key Projects in the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period ( 2012BAD23B04) （ 201404408）
