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稻麦轮作稻田中N_2O排放规律的研究
引用本文:陈义,唐旭,杨生茂,吴春艳,王家玉. 稻麦轮作稻田中N_2O排放规律的研究[J]. 土壤通报, 2011, 0(2): 342-350
作者姓名:陈义  唐旭  杨生茂  吴春艳  王家玉
作者单位:浙江省农业科学院环境资源与土壤肥料研究所;
基金项目:国家自然科学基金项目(NSFC49971048)资助
摘    要:通过连续3年在中国浙江杭州的大型稻田原状土柱渗漏计中开展稻麦轮作稻田中N2O排放规律的研究,探讨了不同作物生长季节、不同年份、不同氮肥用量和氮肥品种对N2O排放的影响。结果表明:稻季的N2O排放主要发生在施肥之后,呈单高峰特征;麦季N2O排放则发生在施肥和较大降水之后,呈多高峰特征,麦季排放与降水有密切相关;不施氮情况下,稻田中N2O排放通量和累计排放量都是稻季高于麦季,稻季分别为麦季的1.97倍和1.34倍;施氮情况下,稻季与麦季排放通量和累计排放量则差别不大,排放通量是稻季略高于麦季(+17%),而累计排放量则是麦季略高于稻季(+21.96%).;施加氮肥可以促进N2O的排放;尿素的排放因子大于硫铵;在麦季施N100~1000 kghm-2的条件下,尿素的排放因子值为0.75~1.31,硫铵为0.15~0.16;在稻季施N150~300 kg hm-2的条件下,硫铵的排放因子值为0.19~0.20;在中国浙江省杭州稻麦轮作稻田中,N2O本底排放量为0.12~0.25 kgN2O-Nhm-2 yr-1,施肥引起的N2O排放占总排放的33%~59%。渗漏水中的N2O/NO3比值随种植季数而增高,可用乘幂关系式表达。

关 键 词:稻田  N2O排放  氮肥  氮肥品种  降水量  稻麦轮作

The N_2O Emission from Rice Fields under Rice-barley Rotation System
CHEN Yi,TANG Xu,YANG Sheng-mao,WU Chun-yan,WANG Jia-yu. The N_2O Emission from Rice Fields under Rice-barley Rotation System[J]. Chinese Journal of Soil Science, 2011, 0(2): 342-350
Authors:CHEN Yi  TANG Xu  YANG Sheng-mao  WU Chun-yan  WANG Jia-yu
Affiliation:CHEN Yi,TANG Xu,YANG Sheng-mao,WU Chun-yan,WANG Jia-yu(Institute of Environmental Resource and Soil Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China)
Abstract:The N2O emission in rice-barley growing rice fields was conducted at the large monolith lysimeters in rice fields to explore the effects of different crop seasons,fertilizer managements,N fertilizer types and precipitation on the N2O emission from rice fields.The observations showed that abundant N2O emission could be found in the alternate stage of rice season to barley season,which was highly correlated with the precipitation during that stage.The emission flux from rice season was similar with that from ...
Keywords:Rice fields  N2O emission  N fertilizer  N fertilizer form  Rainfall  Rice-barley rotation  
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