赤红壤早稻田甲烷排放通量及其影响因素  

CH_4 emission flux from early rice field of laterite and its affecting factors.

作　　者：杜尧东[1] 刘锦銮[1] 杨宁 王天龙 MAK Khalil MJ Shearer 

机构地区：[1]广东省气候与农业气象中心,广州510080 [2]广东省清远市气象局,清远511500 [3]波特兰州立大学物理系,波特兰97207

出　　处：《生态学杂志》2005年第8期939-942,共4页Chinese Journal of Ecology

基　　金：中美合作资助项目。

摘　　要：用封闭箱法对广东省赤红壤早稻田CH4排放通量进行了观测。结果表明,CH4排放有明显的季节变化规律,3个排放高峰分别出现在水稻分蘖末期、孕穗抽穗期和乳熟期,平均通量为5.7mg.m-2.h-1。在测定期内,CH4排放与5和10cm土壤温度呈显著正相关,与土壤Eh呈显著负相关,与土壤pH值、水层深浅相关不明显。The measurement of CH4 emission flux from an early rice field of laterite in Guangdong Province with closed chamber technique showed that the CH4 emission had a significant seasonal pattern, with three peaks at late tillering, booting-heading and milky stages, and an average of 5.7 mg·m^-2·h^-1. During the period of measurement, there was a significantly positive correlation between CH4 flux and soil temperature at 5 cm and 10 cm soil depths, and a significantly negative correlation between CH4 flux and soil Eh. No significant correlation was found between CH4 flux and soil pH or water depth.

关 键 词：赤红壤 早稻田 CH4排放 影响因素 

分 类 号：S511.061[农业科学—作物学]