摘要
温度对稻田甲烷产生有显著影响，温度每升高１０℃，甲烷产生率约增长３倍。水稻在插秧后和收割前出现甲烷产生高峰，在生长中期产生率较低。稻田土壤中甲烷产生率的垂直分布与有机酸含量的垂直分布一致。水稻植株对甲烷产生率有巨大影响，即种植水稻比不种水稻甲烷产生率显著增加。稻田土壤排到大气中的甲烷不到其产生量的２０％。
bstract Studies on laws of methane production in paddysoil have been carried out and the results show that(1) tempera-ture has a significant influence on methane production andmethane production rates increase by about 3 times with a rise of 10℃in temperature;(2)two peaks of methane production ap-pear after transplantation and before harvest respectively for bothearly rice and late rice,methane production rates are lower atmiddle growing stage ;(3)vertical distribution of methane pro-duction rates in paddy soil coincides with that of organic acid contents;(4) methane production rates in paddy soil with rice plants are much higher than those without rice plants and the dif-ference is getting more and more significant with the tice growth;(5)more than 80 % of the methane produced in paddy soil is re-oxidized in the course of transportation to the atmosphere i.e. less than 20%of the methane can be emitted to the atmosphere.
出处
《农村生态环境》
CSCD
1995年第3期11-14,共4页
Rural Eco-Environment
基金
"大气边界层物理和大气化学"国家重点实验室资助项目
关键词
稻田
顶空气相色谱法
甲烷
产生率
paddy field.head-space gas chromatography。methane production rate,seasonal variation, vertical distribution
