黄土高原表土有机碳和无机碳的空间分布及碳储量Storage and spatial distribution of organic and inorganic carbon in the topsoil of Loess Plateau
涂夏明;曹军骥;韩永明;沈振兴;张宝成;
摘要(Abstract):
选取位于干旱-半干旱区的黄土高原陕西境内表土样品为研究对象,对其有机碳(Soil organiccarbon,简称SOC)和无机碳的空间分布及陕西省碳储量进行初步研究。结果表明:黄土高原陕西境内有机碳和无机碳的平均值分别为5.41g/kg和17.04g/kg,有机碳的空间分布是自北向南呈现出增加的趋势,这也与所处环境相符,无机碳的空间分布特征沿着纬度呈现自北向南逐渐增加的趋势,特别是北纬36o以北;将每一区域内CaCO3含量的平均值与相对区域的降雨量和温度分别进行一元线性拟合,其拟合系数分别为R=0.338和0.182,碳酸盐含量与降雨量和温度的相关性并不显著。陕西省表土有机碳和无机碳储量分别为0.272Pg和0.856Pg,无机碳储量远大于有机碳储量,这与其所处干旱环境有关。
关键词(KeyWords): 黄土高原;有机碳;无机碳;碳储量
基金项目(Foundation): 国家基金委杰出青年科学基金(编号:40925009);; 自然科学基金(编号:41073102)资助
作者(Authors): 涂夏明;曹军骥;韩永明;沈振兴;张宝成;
DOI: 10.13448/j.cnki.jalre.2012.02.015
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