中国稻田CH排放量估算研究综述

被引：15

作者：

张广斌 ^{[1
,2
]}

马静 ^{[1
,2
]}

徐华 ^{[1
]}

蔡祖聪 ^{[1
]}

机构：

[1] 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)

[2] 不详

来源：

土壤学报 | 2009年 / 46卷 / 05期

关键词：

稻田; CH4排放; 估算; 不确定因素;

D O I：

暂无

中图分类号：

S511 [稻];

学科分类号：

摘要：

稻田是大气CH4的重要排放源,对中国稻田CH4排放量做出准确估算是中国CH4研究的主要目的之一。估算稻田CH4排放的方法主要有四种:根据田间测定结果或特定的排放系数和该值代表的稻田面积外推计算;将水稻的净初级生产力(NPP)的折算系数与模型相结合进行估算;根据新投入到土壤的有机碳量或原有土壤有机质碳折算;机理模型计算。其次,还有模型与GIS技术、其他方法相结合估算。稻田CH4排放在空间和时间尺度上的变异性是估算结果不确定性的主要驱动因素。统计分析显示中国稻田CH4排放量为8.4(7.2～9.5)Tga-1。

引用

页码：907 / 916

页数：10

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