小麦－玉米轮作期土壤排放N_2O通量及总量估算  

Flux of N_2O Emission from the Fields in a Wheat and Maize Rotation System.

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

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

出　　处：《环境科学》1995年第1期32-35,67,共5页Environmental Science

基　　金：国家勺"八五"科技攻关项目

摘　　要：对小麦－玉米轮作期周年的Ｎ２Ｏ通量进行了测定和总量估算，分析了Ｎ２Ｏ通量与土壤温度、地温、气温、降水和施氮量的关系。由实验获知，华北平原栾城农业生态系统实验站的农田Ｎ２Ｏ通量（Ｎ）为１０．６—２４．２μｇ／（ｍ２·ｈ），相应的全年排放总量（Ｎ）为０．９３—２．１１ｋｇ（ｈｍ２·ａ）。施用尿素的农田排放Ｎ２Ｏ量约占化肥施用量的０．５４％，施用有机肥和化肥的农田排放Ｎ２Ｏ量占总施氮量的０．７０％．Nitrous oxide fluxes from the fields in a wheat and maize rotation system were studied in the North China Plain from September 25,1992 to September 21,1993.The total emission of N2O was also estimated according to the fluxes of nitrous oxide measured in a year period. The fluxes of N2O are 10.6-24.2 μg N/(m2.h ) with the correspondingly annual emission of 0. 93-2.11 kg N/(hm2.a).The N2O emissions from ureafertilized and organic-fertilized plots account for about 0.54%and 0.70% of the amount of applied fertilizers,respectively.

关 键 词：排放总量 小麦-玉米轮作 土壤 一氧化二氮 

分 类 号：X511.01[环境科学与工程—环境工程]