土壤水分状况和氮肥施用及品种对稻田N_2O排放的影响  

Effect of soil water regime and chemical N fertilizers application on N 2O emission from paddy field.

作　　者：徐华[1] 邢光熹[1] 蔡祖聪[1] 鹤田治雄 

机构地区：[1]中国科学院南京土壤研究所土壤圈物质循环开放研究实验室 [2]日本国立农业环境技术研究所

出　　处：《应用生态学报》1999年第2期186-188,共3页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金;中国科学院南京土壤研究所土壤圈物质循环开放实验室资助项目

摘　　要：土壤水分状况和氮肥施用及品种对稻田Ｎ２Ｏ排放有明显影响．当稻田持续淹水时，几乎没有Ｎ２Ｏ排放，而当稻田经历干湿交替循环特别是烤田时，有较高的Ｎ２Ｏ排放通量．稻田持续淹水、干湿交替及烤田期间５个处理的平均Ｎ２Ｏ排放通量分别为１．０２、２３．８７和４７．９９μｇ·ｍ－２·ｈ－１．化学氮肥的施用增加了稻田Ｎ２Ｏ的排放量，且硫铵能比尿素排放更多的Ｎ２Ｏ．施用硫铵氮１００和３００ｋｇ·ｈｍ－２引起的Ｎ２ＯＮ损失率分别为０．０４％和０．２６％，而施用尿素氮的分别为０．０３％和０．１５％．The mean N 2O emission from paddy field under continuously flooding, alternately flooding and soil draining, and drying was 1.02, 23.87 and 47.99μg·m -2 ·h -1 ,respectively. Application of chemical N fertilizers could increase N 2O emission, and ammonium sulphate seemed to emit more N 2O than urea. The fertilizer induced N 2O N loss from ammonium sulfate was 0.04% at the application rate of 100kg·hm -2 , and 0.26% at the rate of 300kg·hm -2 . The corresponding loss was 0.03% and 0.15% from urea.

关 键 词：稻田 N2O 排放通量 水分状况 氮肥品种 

分 类 号：S511.062[农业科学—作物学]