华北平原玉米‖大豆间作农田温室气体排放及系统净温室效应评价

以华北平原玉米‖大豆为研究对象,研究间作对农田土壤CO2、CH4和N2O排放的影响,在此基础上对系统净温室气体平衡（Net greenhouse gas balance,△GWP）进行评价。结果表明,整个生育期玉米单作处理（M）的CO2累积排放最高（12.6t/hm^2）,玉米大豆间作处理比M处理减少4.0%-8.9%。M处理的土壤N2O排放最高（16.0kg/hm^2）,显著高于间作处理,间作处理比M减少32.2%-36.6%（P〈0.05）。间作和单作处理间土壤CH4排放没有显著差异（P〉0.05）。土壤CO2排放动态主要与土壤温度显著相关,而土壤N2O排放则主要与土壤水分含量显著相关（P...

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Published in中国农业大学学报 Vol. 20; no. 4; pp. 66 - 74
Main Author 黄坚雄 隋鹏 高旺盛 陈源泉
Format Journal Article
LanguageChinese
Published 2015
Subjects
净排放潜力
土壤温室气体
玉米‖大豆间作
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ISSN1007-4333

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Summary:以华北平原玉米‖大豆为研究对象,研究间作对农田土壤CO2、CH4和N2O排放的影响,在此基础上对系统净温室气体平衡（Net greenhouse gas balance,△GWP）进行评价。结果表明,整个生育期玉米单作处理（M）的CO2累积排放最高（12.6t/hm^2）,玉米大豆间作处理比M处理减少4.0%-8.9%。M处理的土壤N2O排放最高（16.0kg/hm^2）,显著高于间作处理,间作处理比M减少32.2%-36.6%（P〈0.05）。间作和单作处理间土壤CH4排放没有显著差异（P〉0.05）。土壤CO2排放动态主要与土壤温度显著相关,而土壤N2O排放则主要与土壤水分含量显著相关（P〈0.05）。不同系统的△GWP不同,M系统的△GWP为8 681kg/hm^2,高于等行距间作系统（6635kg/hm^2）,而低于宽窄行间作系统（9 753kg/hm^2）。结果显示,合理的玉米‖大豆间作模式能够减少农田温室气体排放。
Bibliography:11-3837/S
The effect of maize-soybean intercropping on soil greenhouse gas（GHG）emission and net GHG balance（△GWP）of agricultural systems in North China Plain were investigated.Results showed that in the whole growing season the highest accumulative soil CO2 emissions（12.6t/hm^2）,were observed in the treatment of monocultural maize（M）,which were 4.0%-8.9%higher than that in the intercropping treatments.Accumulative soil N2O emissions were highest in the M treatment（16.0kg/hm^2）,which were 32.2%-36.6% higher than that in the intercropping treatments（P〈0.05）.There was no significant difference on soil CH4 emissions between intercropping and monoculture treatments（P〉0.05）.The Pearson＇s correlation assay showed that soil CO2 emissions were mainly related to soil temperature,while soil N2O emissions were mainly correlated with soil water content（P〈0.05）.Results also showed that△GWP differed between agricultural systems.The △GWP of M treatment was 8 681kg/hm^2,which was higher than that in the intercropping system wi
ISSN:1007-4333