广州地区晚季稻田甲烷排放通量与施肥影响研究

研究了广州地区晚季稻田在农业管理措施和肥效基本相同情况下，施用不同肥料类型对稻田甲烷（ＣＨ４）排放通量的影响。试验初步表明：晚季稻田ＣＨ＿４排放基本集中在水稻生长前期；稻田处于灌溉淹水状态是ＣＨ＿４产生的必要条件；稻田处于干湿期间无明显ＣＨ＿４排放；施用有机肥料ＣＨ＿４的排放量明显高于施纯化肥；温度高有利于ＣＨ＿４排放。

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.