稻作制有机肥地下水位对稻田甲烷排放的影响  

Effects of Rice-Based Cropping System,Organic Manure and Groundwater Level on Methane Emission from Rice Fields

作　　者：荣湘民[1] 袁正平[1] 胡瑞芝[1] 朱红梅[1] 黄运湘[1] 周清[1] 张杨珠[1] 肖永兰[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《农业环境保护》2001年第6期394-397,共4页Agro-Environmental Protection

基　　金：湖南省教育厅资助项目(97B024);并得到中科院南京土壤所开放实验室资金资助

摘　　要：采用大田小区试验和长期定位模拟试验,研究了稻作制、有机肥、地下水位对稻田甲烷排放的影响。结果表明,水稻不同生育期甲烷的排放规律4种稻作制有比较一致的变化趋势,早、晚稻均以分蘖期甲烷的排放速率最大,以后逐渐减少。4种稻作制中稻—稻—绿肥甲烷的排放量最小;有机肥施用可明显增加甲烷的排放量;高水位稻田甲烷的排放量明显高于低水位稻田;晚稻甲烷的排放量高于早稻。The plot and stationary experiments were conducted to investigate the effects of rice-based cropping system, organic manure and groundwater level on methane emission from rice fields at Hunan Agricultural University. The results showed that the methane emission during the early rice and late rice growth period of 4 types of rice-based cropping system reached its summit at its stage of tillering, the methane emission after tillering's stage is reduced substantially. The paddy soil treated with “early rice-late rice-green manure crop in winter' has the lowest methane emission in 4 types of rice-based cropping system. Both applying organic manure and raising the groundwater level increase methane emission significantly. The methane emission during the late rice growth period is higher than that during the early rice growth period.

关 键 词：稻作制 有机肥 地下水位 稻田 甲烷排放 大气污染 

分 类 号：X131.1[环境科学与工程—环境科学] X51