黄土高原两种人工林幼林生态系统碳汇能力评价  

Carbon Sink in Two Young Plantations in Loess Plateau

作　　者：王蕾[1] 张景群[1] 王晓芳[1] 苏印泉[1] 

机构地区：[1]西北农林科技大学,杨凌712100

出　　处：《东北林业大学学报》2010年第7期75-78,共4页Journal of Northeast Forestry University

基　　金：陕西省林业厅国际合作项目(14220302)

摘　　要：为定量评价黄土高原侧柏、刺槐人工幼林碳汇能力,对黄土高原8年生人工侧柏林和刺槐林林地土壤、生物量和有机碳质量分数进行了测定,并与对照荒地比较,结果表明:8年生侧柏林生态系统总碳储量为49.312t.hm-2,其中土壤为41.510t.hm-2、乔木层为4.782t.hm-2、灌木层为0.350t.hm-2、草本层为1.520t.hm-2、凋落物层为1.150t.hm-2,其碳库空间分布序列为土壤>乔木层>草本层>凋落物层>灌木层;8年生刺槐林生态系统总碳储量为62.917t.hm-2,其中土壤为43.610t.hm-2、乔木层为16.417t.hm-2、灌木层为1.360t.hm-2、草本层为0.690t.hm-2、凋落物层为0.840t.hm-2,其碳库空间分布序列为土壤>乔木层>灌木层>凋落物层>草本层。与对照荒地相比,侧柏林和刺槐林生态系统碳储量分别增加0.222t.hm-2和13.827t.hm-2,总碳增汇率分别为0.45%和28.17%。Soil,biomass and organic carbon mass fraction of eight-year-old plantations of Platycladus orientalis and Robinia pseudoacacia in the Loess Plateau were studied by comparing with the wasteland （control） in order to evaluate the carbon sink capacity of young plantations. Results indicate that the total carbon storage of the eight-year-old P.orientalis plantation was 49.312 t·hm-2,and the carbon storage in soil layer（41.510 t·hm-2） was highest followed by tree layer（4.782 t·hm-2）,herb layer（1.520 t·hm-2）,litter layer（1.150 t·hm-2） and shrub layer（0.350 t·hm-2）. However,the total carbon storage of the eight-year-old R.pseudoacacia plantation was 62.917 t·hm-2,and the carbon storage in soil layer（43.610 t·hm-2） was highest followed by tree layer（16.417 t·hm-2）,shrub layer（1.360 t·hm-2） ,litter layer（0.840 t·hm-2） and herb layer（0.690 t·hm-2）. Compared with the control,the carbon storage of the P.orientalis and the R.pseudoacacia plantations increased by 0.222 t·hm-2 and 13.827 t·hm-2,and the total carbon sink rates were 0.45% and 28.17%,respectively.

关 键 词：侧柏人工林 刺槐人工林 生态系统 有机碳密度 碳储量 黄土高原 

分 类 号：Q948.1[生物学—植物学] S727.2[农业科学—林木遗传育种]