西北林学院学报2011，Vol.26Issue(2)：57-62,6.
东北过伐林区蒙古栎天然林土壤有机碳研究
Soil Organic Carbon in Over-logged Forest Stands of Quercus mongolica in Northeastern China
摘要
Abstract
Forest soil organic carbon (SOC) is of great importance to maintain the forest site productivity and global carbon balance. Forest stands of Quercus mongolica in the over-logged forest area in northeastern China were selected to study SOC content and SOC density in the soil layers of 0-20 cm, 20-40 cm and 40-60 cm. The relationship between SOC and other soil characteristics was also examined. The results showed that: (1) the mean SOC content of Q. mongolica forest was 31.48 g · kg-1 and SOC density to the depth of 60 cm was 15.76 kg · m-2, with the increase of soil depth, SOC content and density decreased significantly; (2) soil nutrients were rich in the layer of 0-20 cm except for total and available P,with the increase of soil depth, soil nutrients concentrations decreased and significant or very significant differences were found between different soil layers except for soil pH and total K, coefficients of variation (CV) of soil nutrients varied in the soil profile; (3) in the layer of 0-20 cm, SOC content and density had significant positive correlations with soil pH, and very significant positive correlations with soil total N and P as well as available K. In the whole soil profile (0-60 cm), SOC content had significant negative correlations with soil bulk density. SOC content and density had very significant positive correlations with total N and P as well as available P and K.关键词
过伐林/蒙古栎林/土壤有机碳含量/土壤有机碳密度/土壤养分分类
农业科技引用本文复制引用
于洋,王海燕,雷相东,张会儒,赵琨..东北过伐林区蒙古栎天然林土壤有机碳研究[J].西北林学院学报,2011,26(2):57-62,6.基金项目
国家"十一五"科技支撑计划项目(2006BAD03A0802). （2006BAD03A0802）
