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采用广州地区农民常用施肥类型（１化肥；２有机肥＋化肥）和灌溉方式（间歇灌溉），研究晚季稻田ＣＨ４、Ｎ２Ｏ排放规律及排放量。试验初步表明，在一定的施肥量及气候条件下，灌溉水管理是决定ＣＨ４、Ｎ２Ｏ排放量的较主要因素，而这一因素对ＣＨ４、Ｎ２Ｏ排放量的影响互为相反，即施肥后稻田处于灌溉淹水状态有利于ＣＨ４排放而不利于Ｎ２Ｏ排放；稻田处于干湿状态有利于Ｎ２Ｏ排放，但非常不利于ＣＨ４排放；研究初步结果：施纯化肥水稻田所排放的ＣＨ４、Ｎ２Ｏ总量对温室效应及地球臭氧层破坏的综合影响强度大于施有机肥加化肥水稻田。广州地区晚季稻田ＣＨ４排放通量为７．８ｍｇ／ｍ２·ｈ；Ｎ２Ｏ排放通量为２２６μｇ／ｍ２·ｈ。
The common fertilization types (1 chemical fertilizer; 2 organic fertilizer + chemical fertilizer) and irrigation (intermittent irrigation) were used to study the emission and emission of CH4 and N2O in the late season paddy fields. The experiment initially showed that irrigation water management was the main factor to determine the CH4 and N2O emissions under a certain amount of fertilizer and climatic conditions, and the impact of this factor on the CH4 and N2O emissions was the opposite of each other, that is, The status of irrigation flooding is favorable to CH4 emission but not to N2O emission. Drying and wetting of paddy field is favorable to N2O emission, but it is not conducive to CH4 emission. Preliminary results: The total amount of CH4 and N2O emitted from Shi-Chun fertilizer paddy field has a negative effect on the greenhouse effect And the combined effect of ozone depletion on the earth is greater than that of manure and fertilizer paddy fields. The CH4 emission flux of late season paddy field in Guangzhou was 7.8mg / m2 · h and the N2O emission flux was 226μg / m2 · h.