黄土高原刺槐人工幼林碳密度动态变化  

Study on dynamic change of organic carbon in young Robinia pseudoacacia plantation in Loess Plateau

作　　者：刘艳[1] 苏印泉[1] 张玲玲[1] 王健[1] 许喜明[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《南京林业大学学报（自然科学版）》2013年第2期28-32,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：陕西省日元贷款造林生态环境监测研究(14220302)

摘　　要：为研究黄土高原幼龄人工刺槐林地生态系统的有机碳动态变化规律,对刺槐林地在造林后4个阶段(造林2、4、6、9 a)生态系统各层次的有机碳储量进行了持续的监测与调查。结果表明:造林在2 a内对林地有机碳储量影响微小;造林2 a后,林地生态系统各层次有机碳密度均会随着林龄的增大而呈规律性变化,其中土壤层和乔木层为生态系统有机碳的主要来源,土壤层有机碳密度及其在林地有机碳密度中所占的比例随着林龄的增大而减小,乔木层有机碳密度呈相反变化趋势。由此,黄土高原人工刺槐林生态系统有机碳密度随着林龄的增大而增加,与荒地相比,林地有机碳密度分别增加了6.2%、5.21%、21.81%和38.20%,表明黄土高原人工刺槐林在造林后会逐步发挥其显著的碳汇能力。In order to study the characteristic of dynamic change of organic carbon in young black locust（Robinia pseudoacacia）plantation in Loess Plateau,the storage of organic carbon in different layer of ecosystem at four stages（2,4,6,9 a） of black locust were investigated and monitored continuously.The result showed that organic carbon storage density（OCD） was slightly affected within first two years,and then changed greatly in different layers of forest ecosystem with the age increase of plantations in the whole forest ecosystem.The tree layer and soil layer were the two main sources of organic carbon storage.Following the increase of the forest age,the OCD of soil layer and its proportion to the total OCD of forest land decreased,while an opposite tendency of OCD variation appeared in the tree layer.Compared with the barren land,the OCD in forest land increased by 6.2%,15.21%,21.81%,38.20% with the increase of the forest age,indicating that plantations of black locust on Loess Plateau was gradually playing a significant role in carbon storage after afforestation.

关 键 词：有机碳 幼龄刺槐林 碳汇 林地 黄土高原 

分 类 号：S718.56[农业科学—林学]