我国农田土壤肥力演变与培肥及粮食安全徐明岗(中国农业科学院农业资源区划所)安徽农科院土肥所学术报告2013.9合肥土壤生产力(产量)Contribution fromBasic Soil Fertility地力贡献率!SoilProductivityEffects of Management:Fertilization,irrigation,.资源利用效率!基础地力水肥效应地力效应Increasing Soil fertilityCrop Productivity:提高生产力的2条基本途径Soil fertility interaction with efficiency of Waterand fertilizersIncreasing efficiency ofwater and fertilizersCropyield90Tang and Huang,2009单季稻早稻晚稻小麦玉米90Tang and Huang,2009单季稻晚稻小麦水肥贡献力 基贡 础献 地贡 水献 肥基础地力贡献品种和技术相同早稻产量玉米美国中国难以摆脱对大量水肥的依赖Lower Soil Fertilit