广州地区早稻田施肥对N_2O排放影响的初步研究  

PRELIMINARY REPORT ON EFFECTS OF DIFFERENT FERTILIZERS UPON N 2O EMISSION FROM EARLY RICE FIELDS IN THE GUANGZHOU AREA

作　　者：杨军[1,2] 陈玉芬[1,2] 胡飞[1,2] 伍时照[1,2] 王国昌[1,2] 

机构地区：[1]华南农业大学实验中心 [2]华南农业大学农学系

出　　处：《华南农业大学学报》1996年第4期52-57,共6页Journal of South China Agricultural University

摘　　要：研究了广州地区华南农业大学早季稻实验田在农业管理措施和肥效基本相同的情况下，施用不同肥料对稻田Ｎ２Ｏ排放通量的影响。试验初步表明：早季稻稻田Ｎ２Ｏ排放规律是施纯化肥稻田Ｎ２Ｏ排放集中在施肥后第４ｄ～１８ｄ；施有机肥加化肥稻田Ｎ２Ｏ排放集中在施肥后第５ｄ～１０ｄ；施猪粪肥几乎无Ｎ２Ｏ排放。施肥期稻田处于灌溉干湿状态有利于Ｎ２Ｏ排放。稻田处于灌溉淹水状态不利于Ｎ２Ｏ排放。Effects of different kinds of ferilizers on the flux of N 2O emission from early rice fields was investigated in the Guangzhou area under basically equal conditions of both field management practices and fertilizer efficiency. Experiments showed that in fields treated with chemical fertilizer alone, the N 2O emission occurred 4～18 days following the application of fertilizer, whereas in plots recieving organic manure plus chemical fertilizer if took place 5～10 days followingt the application, and almost no N 2O was emitted from plots supplied with organic nanure alone. In the period of fertilization, draining the paddy field favoured the emission of N 2O, but flooding the field did not. A higher temperature in the surface soil also contributed to N 2O emission.

关 键 词：氧化亚氮 排放通量 施肥 水稻田 

分 类 号：X503.231[环境科学与工程—环境工程]