摘要
生态林建设是黄土高原生态环境恢复的重要内容，探讨生态林恢复过程中土壤有机碳密度（SOCD）的变化规律，对该地区生态林恢复的生态效益评估具有重要的理论价值。以黄土高原刺槐（Robinia pseudoacacia）人工林为研究对象，探讨了SOCD的动态变化特征。结果表明，在研究区0～80cm土层范围内，无论是刺槐幼林（8a，4．27kg·1TIq）还是中龄林（26a，4．09kg·m^-2）与荒地（4．53kg·m^-2）相比，土壤SOCD均有降低，分别减少了5．74％和9．71％，说明黄土高原刺槐造林不能提高土壤SOCD；刺槐人工荒山造林对土壤SOCD的垂直分布影响明显，表现为在0～10cmSOCD有显著提高，并分别提高了22．88％和33．05％，在10～30cm范围内显著降低，并分别降低了40．69％和45．52%，而在30～80cm的土壤层范围内差异不显著。
Ecological forest construction is very important part in ecological environment construction in Loess Plateau. To study the change laws of soil organic carbon density （SOCD） in the process of ecological forest restoration is of important theory value to the ecological benefit assessment of ecological environment construction in this area. By taking the black locust（Robinia pseudoacacia）plantation in Loess Plateau as the research object, dynamic variation characteristics of SOCD were investigated. The results showed that compared with wasteland（4.53 kg · m^-2）, SOCD were all reduced whether in the young stand of black locust（8 a,4.27 kg · m^-2）or middle-age（26 a,4.09 kg · m^-2）in the soil range of 0-80 cm, reduced by 5.74% and 9.71% respectively, indicating that SOCD can not be improved by planting black locust in Loess Plateau; The research of SOCD distribution in afforestation of black locust plantation in Loess Plateau showed significant influence, manifested as the SOCD increasing significantly in the soil range of 0-10 cm, they were 22.88% and 33.05% respectively; reducing significantly in 10-30 cm, they were 40.69% and 45.52% respectively; but there was no obvious difference in the range of 30-80 cm.
出处
《西北林学院学报》
CSCD
北大核心
2009年第5期21-25,共5页
Journal of Northwest Forestry University
基金
陕西省日元贷款造林项目“生态环境监测研究”(14220302)
关键词
刺槐人工林
土壤
有机碳密度
监测研究
black locust plantation
soil
organic carbon density
monitoring research
