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收集高效氮肥N2O排放资料,利用整合分析法分析高效氮肥对N2O的减排效果.稳定性氮肥排放的N2O是普通肥料的0.66倍,减排效果显著;包膜缓释氮肥N2O排放量为普通氮肥的0.95倍,无显著减排效果.若将全国范围的普通氮肥替换为稳定性氮肥、且用N量不变时,稳定性氮肥在中国农田的N2O减排潜力均值为1.03×108kgN/a,碳排放交易收入为16.86亿元/a;根据现有市场上稳定性氮肥的价格,每亩地每季补贴4.9元,碳排放交易收入和稳定性氮肥成本增加量相抵.由于稳定性氮肥能有效提高N利用率,保证农作物吸N总量不变时减少用N量,稳定性肥料N利用率提高8个百分点时,N2O减排经济效益(即碳排放交易收入-稳定性氮肥成本增加量)为94亿元/a.
N2O emission from highly efficient nitrogenous fertilizer was collected, and the emission reduction effect of high-efficiency nitrogen fertilizer on N2O was analyzed by using integrated analysis method.The N2O emission of stable nitrogen fertilizer was 0.66 times of that of common fertilizer, and the emission reduction effect was remarkable. N2O emission of coated slow- 0.95 times, no significant emission reduction effect.If the countrywide ordinary nitrogen fertilizer is replaced by a stable nitrogen fertilizer, and with the same amount of N, the average N2O emission reduction potential of stable nitrogen fertilizer in China farmland is 1.03 × 108kgN / a, The carbon emissions trading income was 1.686 billion yuan / a. According to the price of stable nitrogen fertilizer in the market, the subsidy of 4.9 yuan per mu per mu was offset by the increase of carbon emissions trading income and the increase of stable nitrogen fertilizer cost. Increase N use efficiency, reduce N use amount when the amount of N absorbed by crops is constant, and N utilization efficiency of N2O fertilizer (ie, carbon trading revenue - increase of cost of stable nitrogen fertilizer) when N utilization of stable fertilizer is increased by 8% 9.4 billion yuan / a.