不同林地土壤有机碳储量及垂直分布特征  

Features of Soil Organic Carbon Storage and Vertical Distribution in different Forests

作　　者：杨晓梅[1] 程积民[1] 孟蕾[2] 韩娟娟[2] 

机构地区：[1]中国科学院水利部水土保持研究所,陕西杨凌712100 [2]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《中国农学通报》2010年第9期132-135,共4页Chinese Agricultural Science Bulletin

基　　金：国家重点基础研究发展计划"973"项目(2007CB106803);国家自然科学基金重点项目(40730631);中国科学院重要方向项目(KZCX2-YW-441);中国科学院重要方向项目(KZCX2-YW-149)

摘　　要：基于样地调查与室内分析,研究了黄土高原子午岭林区天然柴松林、辽东栎林及人工油松林3种林地土壤有机碳储量及其垂直分布特征。结果表明:(1)3种林地土壤有机碳含量柴松林为13.67g/kg,辽东栎林为13.95g/kg,油松林为11.43g/kg,并随着土壤深度的增加呈现递减的趋势,不同林分变化幅度差异不同,且各土层间的差异达到了显著性水平。(2)3种林地土壤有机碳密度差异显著,土层间碳密度变化范围为1.06～3.67kg/m2,并随土壤深度增加而减少;在整个土壤垂直剖面上,有机碳碳密度在9.38～11.43kg/m2之间,其中0～50cm深度碳密度的贡献率达80%以上。(3)3种林地土壤碳储量偏低,平均为105.2t/hm2,不同林分间的差异较大。Based on the field data and laboratory analysis, we studied the soil organic carbon storage and vertical distribution features about natural Pinus tabulaeformis f. shekannesis, Quereus liaotungensis and artificial P. tabulaeformis forest in Ziwuling forest area of Loess Plateau. The results were showed as followings： 1） Content of soil organie carbon was： 13.67g/kg, 13.95g/kg, and 11.43g/kg, respectively for Pinus tabulaeformis shekannesis, Quereus liaotungensis and artificial P. tabulaeformis. With depth of soil, organic carbon contents generally deereased, but the range was different in these three forest types. Meanwhile, great significance differences have appeared among different soil layers. 2） Soil carbon density in the three forest types changed greatly, with a range of 1.06-3.67 kg/m2 for five soil layers. Furthermore, soil carbon density decreased generally with the depth, as well as carbon content. In the whole soil profile, the range of carbon density in these three forests was from 9.38 kg/m2 to 11.43 kg/m2. However, 80% earbon concentrated in 50 cm depth of soil. 3） Soil carbon storage is low in these three forests. The average of storage was 105.2 t/hm2, and great differences appeared between forest types.

关 键 词：土壤有机碳 碳储量 垂直分布 森林类型 

分 类 号：S714.5[农业科学—林学]