A cost-efficient method to assess carbon stocks in tropical peat soil
A cost-efficient method to assess carbon stocks in tropical peat soil
复制标题
一种评估热带泥炭土碳储量的经济有效的方法
DOI：
10.5194/bgd-9-7049-2012
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发表时间：
2012
期刊：
影响因子：
4.9
通讯作者：
A. Iswandi
中科院分区：
文献类型：
--
作者：
Matthew Warren;J. B. Kauffman;D. Murdiyarso;G. Anshari;K. Hergoualc’h;S. Kurnianto;J. Purbopuspito;E. Gusmayanti;M. Afifudin;J. S. Rahajoe;L. Alhamd;S. Limin;A. Iswandi
摘要。估计热带湿地森林的地下碳储量需要为实验室分析和适当的设施提供资金，而这些在发现大多数热带湿地的发展中国家往往是缺乏的。因此，开发简单的分析工具来协助在财政和技术限制普遍的地方进行地下碳估算是有益的。在这里，我们使用已发表的和原始的数据来描述土壤碳密度（kgC m−3;Cd）作为体积密度（gC cm−3;Bd）的函数，它可以用来快速估计地下碳储量，仅使用Bd测量。对印度尼西亚3个国家公园10个泥炭沼泽林分的预测碳密度和储量进行了比较。土壤碳密度与容重的线性关系（Cd = Bd × 495.14 + 5.41, R2 = 0.93, n = 151）表明，有机碳含量为> ~ 40%时，土壤碳密度与容重呈较强的线性关系。随着有机碳含量的降低，Cd和Bd之间的关系变得难以预测，因为土壤质地成为Cd的重要决定因素。该方程预测的地下C储量在观测值的0.92% ~ 9.57%之间。收集的泥炭样本的平均容重为0.127 g cm - 3，这是东南亚泥炭地以前报告的上限。当纳入原始数据时，修正后的方程Cd = Bd × 468.76 + 5.82, R2 = 0.95, n = 712，略低于原始方程的下95%置信区间，并有降低Cd估估值的趋势。我们推荐最后一个公式用于快速估算发育良好的泥炭土的土壤碳储量，其中碳含量约为40%。
Abstract. Estimation of belowground carbon stocks in tropical wetland forests requires funding for laboratory analyses and suitable facilities, which are often lacking in developing nations where most tropical wetlands are found. It is therefore beneficial to develop simple analytical tools to assist belowground carbon estimation where financial and technical limitations are common. Here we use published and original data to describe soil carbon density (kgC m−3; Cd) as a function of bulk density (gC cm−3; Bd), which can be used to rapidly estimate belowground carbon storage using Bd measurements only. Predicted carbon densities and stocks are compared with those obtained from direct carbon analysis for ten peat swamp forest stands in three national parks of Indonesia. Analysis of soil carbon density and bulk density from the literature indicated a strong linear relationship (Cd = Bd × 495.14 + 5.41, R2 = 0.93, n = 151) for soils with organic C content > 40%. As organic C content decreases, the relationship between Cd and Bd becomes less predictable as soil texture becomes an important determinant of Cd. The equation predicted belowground C stocks to within 0.92% to 9.57% of observed values. Average bulk density of collected peat samples was 0.127 g cm−3, which is in the upper range of previous reports for Southeast Asian peatlands. When original data were included, the revised equation Cd = Bd × 468.76 + 5.82, with R2 = 0.95 and n = 712, was slightly below the lower 95% confidence interval of the original equation, and tended to decrease Cd estimates. We recommend this last equation for a rapid estimation of soil C stocks for well-developed peat soils where C content > 40%.