生态学杂志2012，Vol.31Issue(1)：51-58,8.
苏北沿海不同林龄杨树林土壤活性有机碳特征
Characteristics of soil labile organic carbon in poplar plantations of different ages in coastal area of North Jiangsu
摘要
Abstract
To understand the characteristics of soil labile organic carbon and its correlations with soil physical and chemical properties in the poplar (Populus euramericana cv. San Martino) plantations of different ages in coastal area of North Jiangsu, five poplar plantations of 4-, 8-, 12-, 15-, and 20 years old were selected, with the total organic carbon (TOC) , water-soluble organic carbon (WSOC) , microbial biomass carbon (MBC) , and physical and chemical proper ties in 0-10, 10-25 , and 25-40 cm soil layers analyzed. In the five plantations, the contents of soil TOC, WSOC, and MBC all decreased with soil depth, and the soil TOC content had a trend of decreased after an initial increase with increasing plantation age, being the maximum in the 15 years old plantation and the minimum in the 4 years old plantation. Overall, the contents of soil WSOC and MBC had the same variation trend as soil TOC content, and the soil WSOC/TOC and MBC/TOC ratios increased with increasing plantation age. There was a significant correlation be tween soil WSOC and MBC, and the soil WSOC and MBC were significantly correlated with soil TOC, TN, C/N, pH, and bulk density but not correlated with soil total S and soil moisture. This study indicated that with the increasing age of the poplar plantations in the coastal area of North Jiangsu, soil labile organic carbon content had no definite variation pattern, which affected the plantations acting as a carbon sink to a certain extent.关键词
林龄/杨树人工林/土壤总有机碳/土壤活性有机碳Key words
stand age/poplar plantation/soil total organic carbon/soil labile organic carbon分类
农业科技引用本文复制引用
谢涛,王明慧,郑阿宝,徐长柏,王国兵,葛之葳,阮宏华..苏北沿海不同林龄杨树林土壤活性有机碳特征[J].生态学杂志,2012,31(1):51-58,8.基金项目
国家林业局林业公益性项目(201 104006和200804006)资助. （201 104006和200804006）
