覆膜滴灌条件下稻田CH_4排放研究  

Study on Methane Emissions in Paddy Soil under Covered Film Drip Irrigation

作　　者：张于[1] 黄凯[1] 李晓[1] 方秀琴[2] 都兴林[1] 

机构地区：[1]吉林大学植物科学学院,长春130062 [2]吉林省农业科学院水稻研究所,吉林公主岭136100

出　　处：《中国稻米》2016年第2期36-38,共3页China Rice

基　　金：吉林省重点科研项目"水稻特异种质资源创制与高产;优质;多抗新品种选育研究"(20150204005NY)

摘　　要：为了揭示覆膜滴灌对稻田CH_4综合排放的影响,采用比较分析法分析了覆膜滴管条件下稻田甲烷的排放变化。试验采用覆膜滴灌Ⅰ、覆膜滴灌Ⅱ和漫灌3个处理,分别对当地高产主栽品种吉旱1号进行CH_4排放通量的测定。结果表明,覆膜滴灌稻田CH_4排放通量显著高于漫灌稻田;覆膜滴灌处理条件下,土壤含水率高的覆膜滴灌Ⅰ稻田CH_4排放通量高于覆膜滴灌Ⅱ,说明土壤水分是稻田CH_4排放的主要影响因素之一;3个处理下CH_4的排放趋势大体一致,排放高峰均出现在水稻分蘖的前中期和拔节孕穗期,说明覆膜滴灌未改变稻田CH_4排放的进程。To reveal CH4 emissions in rice fields under covered film drip irrigation, the comparative method was used to study the methane emission of rice paddy with drip irrigation under mulch film. Experiments were divided into three treatments： drip Ⅰ, drip Ⅱ and flooding. The local high-yielding cultivars Jihan 1 was used to analysis the methane emissions from rice paddy. The results showed that methane emission flux from rice fields under covered film drip irrigation was less than flooded conditions; methane emis-sion flux in drip Ⅰ was higher than that of drip Ⅱ, which indicated that the soil moisture content is one of the major factors which affect CH4emission; methane emissions trend under three conditions were roughly the same, and the emission peaks were in mid tillering stage and jointing booting stage, which indicated that the process of CH4 emission from paddy field under film drip irrigation was not changed.

关 键 词：水稻 CH4排放 覆膜滴灌 漫灌 

分 类 号：S511.071[农业科学—作物学]