不同耕作方式下稻田土壤CH4和CO2的排放及碳收支估算

被引：38

作者：

李成芳 ^{[1
,2
]}

曹凑贵 ^{[1
,2
]}

汪金平 ^{[1
,2
]}

翟中兵 ^{[3
]}

梅少华 ^{[4
]}

机构：

[1] 农业部华中作物生理生态与栽培重点开放实验室华中农业大学

[2] 华中农业大学植物科技学院

[3] 湖北省武穴市大法寺镇农业技术推广服务中心

[4] 湖北省武穴市农业局

来源：

农业环境科学学报 | 2009年 / 28卷 / 12期

关键词：

免耕; 稻田; CH4; CO2; 碳收支;

D O I：

暂无

中图分类号：

S511 [稻];

学科分类号：

摘要：

二氧化碳(CO2)和甲烷(CH4)是重要的温室气体,研究免耕稻田CO2和CH4排放有助于评价稻田免耕技术对全球气候变化及碳循环的影响。本文通过运用静态箱技术和田间原位碱液吸收法研究了免耕稻田土壤CO2和CH4的排放规律和排放量,及其稻田碳(C)的收支状况。研究表明,施肥提高了CH4排放,而不影响CO2的排放;免耕显著影响稻田CH4排放,而CO2的排放不受耕作影响。对稻田C收支及平衡的分析表明,施肥提高了稻田系统C的输入,同时,相对于翻耕处理,免耕处理表现为大气C的"汇",表明了稻田免耕能将更多的碳累积于农田土壤碳库中,有利于提高稻田生态系统在减缓气温上升过程中所发挥的作用。

引用

页码：2482 / 2488

页数：7

共 28 条

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