摘要
为了给人工林生态效益评估提供依据,以黄土高原8年生毛白杨人工林为研究对象,实际调查了样地乔木层、灌草层、枯落物层生物量,采用分层取样法获取土壤剖面分析样品,并用SPSS 17.0软件对毛白杨人工林生态系统碳密度及其土壤层碳密度的垂直分布规律进行了研究。毛白杨人工林生态系统碳密度分层比较的排序为:土壤层(5.350 kg.m-2)>乔木层(2.257 kg.m-2)>灌草层(0.259 kg.m-2)>枯落物层(0.116 kg.m-2);土壤层碳密度随着土壤深度的增加逐渐减少,与荒地相比,总体降低了3.6%。毛白杨人工林生态系统的总碳密度与荒地相比,增加了34.7%,年平均有机碳储存率提高4.3%,表明毛白杨人工林具有碳汇能力。
Biomass of tree layer, shrub layer and litter layer of eight-year-old Populus tomentosa plantations in the Loess Plateau was determined to provide a basis for the assessment of ecological benefits of plantation ecosystems. The carbon density of P. tomentosa plantation ecosystems mad the vertical distribution of carbon density in different soil layers were studied using SPSS 17.0 software and soil profile samples obtained by stratified sampling. Results showed that the carbon density in the soil layer of P. tomentosa plantation ecosystems was the highest （ 5. 350 kg ·m^-2） , followed by tree layer （2.257） , shrub layer （0.259） and litter layer （0. 116）. Carbon density in the soil layer decreased with increasing soil depth, and it was 3.6 % lower than that of the barren land. The total carbon density and annual average carbon-sequestration rate of P. toentosa plantation ecosystems increased by 34.7% and 4.3% respectively compared with the barren land. P. tomentosa plantation ecosystems have carbon storage ability.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2011年第1期54-57,共4页
Journal of Northeast Forestry University
基金
中-日合作陕西省日元贷款造林项目(14220302)
关键词
黄土高原
毛白杨
人工林
生态系统
碳密度
Loess plateau
Populus tomentosa
Plantations
Ecosystems
Carbon density
