水土保持研究2013，Vol.20Issue(1)：52-56,5.
黄土丘陵区人工柠条林土壤有机碳组分和碳库管理指数演变
Evolution Characteristics of Soil Organic Carbon Components and Carbon Management Index in Caragana microphylla Plantations in Loess Hilly Region
摘要
Abstract
Based on the spatiotemporal substitution method, the evolution characteristics of soil organic carbon components and carbon management index was investigate in Caragana microphylla plantations with age sequence of 10 a. 17 a, 30 a, 34 a, 40 a and 50 a in the loess hilly region. The results showed that; the contents of soil organic carbon and soil labile organic carbon both increased with the growth years of C. microphylla, and had similar variation trend with the lowest content in the 10-year plantations and the steady level in 40 to 50-year plantations. But the peak content of soil organic carbon and soil labile organic carbon appeared in different ages, the highest soil organic carbon content was found in the 34-year plantations, with the value of 4. 29 g/kg, while the highest soil labile organic carbon content presented in the 40-year plantations, with the value of 0.83 g/kg. Soil carbon management index increased with the C. microphylla growth. At the depth of 0-20 cm, the carbon management index of C. microphylla plantations had significantly increased from 54.2% to 153.0% compared with that in the 10-year plantations, but at the depth of 20-40 cm, soil carbon management index did not increased greatly, and it even decreased from 8. 0% to 16. 9% during the 17-year and 30-year plantations. Correlation analysis showed that there was a very significant positive correlation between soil total organic carbon content and soil labile organic carbon content, and soil carbon components also had significant or very significant relationship with soil fertility index. Carbon pool index and carbon management index had significant relationship with soil carbon components and soil fertility indexes. The results indicated that planting C. microphylla will improve the soil fertility. Carbon pool index and carbon management index can be used as monitoring factors to reflect vegetation recovery in loess hilly region.关键词
黄土丘陵区/柠条/土壤有机碳/碳库管理指数Key words
loess hilly region/ Caragana microphylla / soil organic carbon/ carbon management index分类
农业科技引用本文复制引用
崔静,陈云明,曹扬,王琼芳,黄佳健,王琳琳..黄土丘陵区人工柠条林土壤有机碳组分和碳库管理指数演变[J].水土保持研究,2013,20(1):52-56,5.基金项目
中国科学院战略性先导科技专项"暖温带落叶阔叶混交林区域森林固碳现状、速率和潜力研究"(XDA05050203) （XDA05050203）
中国科学院百人计划项目"黄土高原半干旱区群落水分平衡与调控机理"(KZCX2-YW-BR-02) （KZCX2-YW-BR-02）
