华北地区旱田土壤氧化亚氮的排放  

EMISSION OF NITROUS OXIDE FROM DRYLAND IN NORTHERN CHINA

作　　者：宋文质[1] 王少彬[1] 曾江海[2] 王智平[2] 张玉铭[2] 

机构地区：[1]中国科学院生态环境研究中心 [2]中国科学院石家庄农业现代化研究所

出　　处：《环境科学进展》1997年第4期49-55,共7页

摘　　要：在１９９１－１９９３年间用封闭罩测定了对照田、施肥田Ｎ２Ｏ的排放量。结果表明，Ｎ２Ｏ通量显示出时、空变化规律。对照田，施尿素田和施混合肥田（尿素加有机肥）Ｎ２Ｏ排放量分别是１．０３±０．４ｋｇＮ／ｈｍ２ａ；１．９１±０．６ｋｇＮ／ｈｍ２ａ和２．１１±１．０ｋｇＮ／ｈｍ２ａ．尿素和混合肥释放Ｎ２Ｏ系数分别为０．２９％和０．３５％。由土壤含水量，土壤温度和速效氮浓度等土壤变量建立了Ｎ２Ｏ排放的统计模式。Flux of nitrous oxide was measured in control and fertilized plots using closed chamber from 1991 to 1993.Results indicated that N 2O flux showed temporal and spatial variations,Emissions of nitrous oxide from control,urea fertilized and manured plots were 1.03±0.40kgN/hm 2a,1.91±0.58kgN/hm 2a,and 2.11±1.01kgN/hm 2a,respectively.Emission coefficients of urea and manure were 0.29%and 0.35%,respectively.Statistical model was developd combining soil water content,soil temperature and soil nitrogen concentration available.

关 键 词：氧化亚氨 旱田 华北地区 空气污染 土壤 排放 

分 类 号：X511.01[环境科学与工程—环境工程] S153.61[农业科学—土壤学]