中文摘要：

目前,国内外学者很少从评价的角度去研究农田温室气体减排技术,缺乏完整性和统一性的评价指标,不利于对农田管理技术进行科学的判断.本研究汇总了当前可作为农田减排技术评价的指标,遵循代表性、客观性、完整性、主导性和可操作性原则,对各项指标的合理性进行了分析,依据我国农业生产实际情况,确定了农田生态系统温室气体减排技术的评价指标.以单位面积粮食产量作为约束性指标,温室气体排放强度（单位产量下的温室气体排放总量）作为综合指标,并将粮食产量、土壤有机碳变化、N2O直接排放、水田CH4排放与农田投入直接和间接排放作为后者的分项指标;依据温室气体排放强度计算公式,能够科学、系统地评价农田减排技术的温室效应,可为我国农田减排技术的提出和推广提供科学依据.

英文摘要：

In spite of the increasing studies on greenhouse gas （GHG） emissions mitigation techno- logies, there is still a lack of systematic indices for evaluation of their overall impacts in croplands. In this study, we collected all the indices relating to greenhouse gas emissions and analyzed each in- dex following the principles of representativeness, objectivity, completeness, dominance and opera- bility. Finally, we proposed evaluation indices for mitigation technologies based on the current situa- tion of China. Crop yield per unit area was proposed as a constrained index, and greenhouse gas emissions intensity, defined as GHG emissions per unit of produced yield, was proposed as compre- hensive index to evaluate the greenhouse effect of various croplands mitigation technologies. Calcula- tion of GHG emissions intensity involved yield, change of soil organic carbon, direct N20 emis- sions, paddy CH4 emissions and direct and indirect emissions from inputs into croplands. By follow- ing these evaluation indices, the greenhouse effect of the technologies could be well evaluated, which could provide scientific basis for their further adoption.