摘要
对鹤山几种不同土地利用方式下的土壤碳的研究 ,结果表明不同土地利用方式土壤碳储量存在差异。各种土地利用方式下 ,无论林地果园还是草地土壤有机碳含量均随土壤深度增加而减少。在同一深度不同土地利用下有机碳含量比较一般为 :林地 >果园 >草地。全氮的变化趋势也与有机碳一样 ,随土壤深度增加而递减 ,C N比为 10左右 ,其变化的幅度不明显。土壤有机碳储量的计算有如下结果 :林地为 12 5 .82t·hm- 2 ;果园为 74 .6 6t·hm- 2 ;草地为88.5 3t·hm- 2 。据此认为 ,植树造林及森林保护是缓解大气CO2 浓度上升的有效措施。
In order to find the relationship between land use and soil carbon sequestration, especially the influence of vegetation rehabitation, these indices including some of related chemical characteristics such as soil organic matter, total nitrogen, were studied in this paper. The results showed that: among the different land use, it had different soil carbon storage. All the test plots, the forest soil, orchard soil or the grassland soil, which the content of soil organic carbon (SOC) decreased with the increase of soil depth, and the content of SOC in different land use at the same depth was generally in order: forest soil > orchard soil > grassland soil. The variation tendency of total nitrogen content was the same as soil carbon content. The ratio of C/N was 10 or so. According to the calculation, for the different soil bulk density, soil organic carbon storage of forest land, orchard land and grass land reached 125.82t·hm -2 , 74.66 t·hm -2 and 88.53 t·hm -2 with the three kinds of land use, respectively. As the results, expanding afforestation and forest protection were effective measures to mitigate the rising of CO 2 in atmosphere.
出处
《山地学报》
CSCD
2002年第5期548-552,共5页
Mountain Research
基金
国家自然科学基金重大项目 (3 98993 70 )
中国科学院知识创新项目 (KZCX2 -4 0 7)
广东省基金重大项目 (980 95 2 )
中国科学院鹤山开放基金
