稻田CO_2浓度和通量变化特征以及水分利用效率的研究  

A Study on the Features of CO_2 Concentration and Flux Changes and WUE in Rice Field

作　　者：冯敏玉[1,2] 宫松[3] 魏丽[4] 张文红 胡逢喜 张崇华 肖金香[5] 

机构地区：[1]江西省气象科学研究所,江西南昌330046 [2]江西省农田生态与农业气象试验站,江西南昌330200 [3]江西农业大学国土学院,江西南昌330045 [4]江西省气象局,江西南昌330046 [5]江西农业大学园林与艺术学院,江西南昌330045

出　　处：《江西农业大学学报》2008年第5期927-932,共6页Acta Agriculturae Universitatis Jiangxiensis

基　　金：中国气象局新技术推广项目(CMATG2007M37);江西省气科所气象创新科技项目(GCX200709)

摘　　要：通过对2006年晚稻从移栽到成熟期的CO2浓度和CO2通量的平均日变化、全生育期的变化特征、以及与WUE变化的关系分析,结果表明:白天有光合作用时,CO2浓度逐渐降低,CO2通量由向下为主,夜间没有光合作用时,CO2浓度逐渐升高,CO2通量由向上为主;拔节期向下的通量大于孕穗期,成熟期向下的通量最小。孕穗期的水分利用效率最大,乳熟期次之,分蘖普遍期的最小。The changes in the CO2 concentration and flux and the changes of WUE in the ecosystem of rice field from transplanting to the mature stage in 2006 were analyzed, the results indicated that the CO2 concentration decreased and the flux was downwards when there was photosynthesis in daytime; the CO2 concentration was little higher and the flux was upwards when there was no photosynthesis at night. The downwards flux in the stem pushing stage was more than that in the pregnant fringe stage, the flux in the mature stage was the least. The WUE was the greatest in the pregnant fringe stage, the second in the milky stage and the least in the tillring stage.

关 键 词：稻田 CO2浓度 CO2通量 水分利用效率 

分 类 号：S142[农业科学—肥料学]