千阳县不同林分土壤有机碳的分布特征  

Distribution characteristics of soil organic carbon of different forests in loess plateau of Qianyang county

作　　者：辛文杰[1] 苏印泉[1] 朱铭强[1] 胡瑞瑞[1] 刘艳[1] 黄帅[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《中南林业科技大学学报》2014年第5期66-69,78,共5页Journal of Central South University of Forestry & Technology

基　　金：中日合作课题(K332020908);陕西省日元贷款项目(K332020023)

摘　　要：通过对黄土高原千阳县不同人工林土壤有机碳的含量及其分布特征的研究，为千阳县人工造林和生态系统的恢复提供依据。于2012年在黄土高原千阳县调查了毛白杨Populus tomentosa、刺槐Robinia pseudoacaia、侧柏Platycladus orientalis、荒地4种样地的土壤有机碳含量，并对其进行相关性分析。结果表明：在调查的0～80 cm土层范围内，土壤有机碳含量为毛白杨（4.83 g·kg-1）＞荒地（3.55 g·kg-1）＞刺槐（3.48 g·kg-1）＞侧柏（3.42 g·kg-1），随着土壤深度的增加，各林分土壤有机碳含量逐渐降低；各人工林在0～30 cm土层范围内，土壤有机碳含量和土壤密度变化差异显著（P＜0.05），而在30～80 cm土层范围内变化差异不显著（P＞0.05）。采用不同的树种进行植树造林、植被恢复，有利于土壤碳汇含量的增加，研究结果表明在黄土高原利用毛白杨人工造林优于其它树种。The soil organic carbon contents of plantations （Robinia pseudoacaia, Populus tomentosa, Platycladus orientalis） and wasteland, and the distribution characteristics were investigated in Qianyang county loess plateau in 2012, in order to provide the references for the recovery of artificial afforestation and ecological system. The results show that in the investigated range of 0~80 cm soil layer, the soil organic carbon contents of four kinds of sample plots ranked from big to small as follows：P. tomentosa（4.83 g·kg-1）〉wasteland（3.55 g·kg-1）〉black locust （3.48 g·kg-1）〉arborvitae （3.42 g·kg-1）;with the increase of soil depth, the soil organic carbon contents of the forests gradually reduced; the soil organic carbon contents and soil density differences in 0~30 cm soil layer of the plantations were significant （P＆lt;0.05）, while that in 30~80 cm soil layer had no significant differences（P〉0.05）.Using different tree species for afforestation and vegetation restoration was propitious to increase the soil carbon contents. It is concluded that the poplar plantation were better than other forest species in the Loess plateau.

关 键 词：土壤有机碳 有机碳密度 垂直分布 碳储量 千阳县 

分 类 号：S718.56[农业科学—林学]