黑麦草鲜草翻压还田对双季稻CH4与N2O排放的影响

被引：18

作者：

朱波 ^{[1
]}

易丽霞 ^{[1
]}

胡跃高 ^{[1
]}

曾昭海 ^{[1
]}

唐海明 ^{[2
]}

肖小平 ^{[2
]}

杨光立 ^{[2
]}

机构：

[1] 中国农业大学农学与生物技术学院

[2] 湖南省土壤肥料研究所

来源：

农业工程学报 | 2011年 / 27卷 / 12期

关键词：

温室气体; 甲烷; 尿素; 黑麦草; N2O; 全球增温潜势(GWP); 双季稻;

D O I：

暂无

中图分类号：

S511.42 [];

学科分类号：

摘要：

为了研究黑麦草鲜草翻压还田对稻田温室气体排放的影响,该文利用静态箱-盆栽装置观测了尿素、黑麦草鲜草翻压还田、半量尿素与半量黑麦草鲜草混施和对照4个处理稻田CH4和N2O排放。结果表明:黑麦草鲜草翻压还田、半量尿素与半量黑麦草鲜草混施的CH4排放通量分别比对照增加了371%和210%,比尿素增加了152%和66%;尿素的CH4排放比对照高87%,差异均达到显著水平(P<0.05)。黑麦草鲜草翻压还田的CH4排放在3个时期(早稻移栽前,早稻生长期和晚稻生长期)分布均匀,约60%的CH4排放于早稻移栽前和早稻生长期。尿素的N2O排放分别为黑麦草鲜草翻压还田、半量尿素与半量黑麦草鲜草混施和对照的18倍、6.6倍和25倍。CH4和N2O的全球增温潜势(GWP)依次为黑麦草鲜草翻压还田>半量尿素与半量黑麦草鲜草混施>尿素>对照,差异均显著(P<0.05)。黑麦草鲜草翻压还田虽然增加了稻田CH4排放,但减少了N2O排放,抑制了尿素对N2O的排放。

引用

页码：241 / 245

页数：5

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