RESEARCH ON THE RELATION BETWEEN METHANE EMIS-SION FLUX AND EFFECT OF APPLYING DIFFERENT KINDS FERTILIZER TO LATE RECE PADDY-FIELD IN THE GUANGZHOU AREA

This study dealt with the effects of using four kinds of fertilizer application at the same effective fertility level under the normal late rice field management to pad- dy-fields in Guangzhou area on methane emission flux.The result showed that methane emitted significantly in the early growth phase of late rice in paddy-fields,in paddy-fields water immersion was a necessary condition for methane emission,no significant methane emitted in the dry-wet management period;methane emission flux in fields with organic manure applied was higher than that in fields treated with chemical fertilizers;higher soil temperature facilitated methane emission.