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以黑土稻田为研究对象,研究CH4控排的最优水肥配施方案,采用静态暗箱-气相色谱法并运用4因子二次饱和D-最优设计方案分析了控制灌溉条件下氮肥、磷肥、钾肥和灌水量对温室气体CH4生长季排放量的影响。结果表明,氮肥的增加可明显降低CH4生长季排放量,钾肥和磷肥作用不明显,灌水量在高水平时会促进CH4生长季的排放。结合产量,筛选出稻田甲烷减排20%~40%的综合水肥优化施配方案为:施氮量114.72kg/hm2,施钾量50.25kg/hm2,施磷量37.51kg/hm2,分蘖末期土壤相对含水率为80%。
Taking paddy field of black soil as the research object, the optimal scheme of water and fertilizer allocation for CH4 control row was studied. Static black box-gas chromatography and D-optimal design of 4 factors were used to analyze the effects of nitrogen, phosphate and potassium And the amount of water on greenhouse gas CH4 growing season emissions. The results showed that the increase of nitrogen fertilizer could significantly reduce the amount of CH4 emissions in the growing season, while the effect of potassium and phosphate fertilizer was not obvious. When the amount of water was high, it would promote the emission of CH4 in the growing season. Combining with the yield, the optimal plan of comprehensive water and fertilizer application for 20% -40% reduction of methane emission in paddy field was selected as follows: nitrogen application rate of 114.72kg / hm2, potassium application rate of 50.25kg / hm2, phosphorus application rate of 37.51kg / hm2, The relative water content is 80%.