主要栽培措施对北方春玉米产量贡献的定量评估

杨哲,于胜男,高聚林,田甜,孙继颖,魏淑丽,胡树平,李荣发,李从锋,王志刚

Quantitative Evaluation of the Contribution of Main Management Factors to Grain Yield of Spring Maize in North China

YANG Zhe,YU ShengNan,GAO JuLin,TIAN Tian,SUN JiYing,WEI ShuLi,HU ShuPing,LI RongFa,LI CongFeng,WANG ZhiGang

表3 不同栽培措施因子对玉米产量差的影响及其对产量及氮肥偏生产力的贡献率

Table 3 Magnitude and contribution rate of different management factors to yield gap and PFPN of maize

优先序 Priority 因素 Factor 产量差 Yield gap (t·hm-2) 对产量贡献率 Contribution rate to yield (%) 对PFPN贡献率 Contribution rate to PFPN (%) 文献综述 References 田间试验 Field test 平均值 Average 文献综述 Reference 田间试验 Field test 平均值 Average 田间试验 Field test 1 种植密度 Population 1.4 1.9 1.7 10.6 14.7 12.6 16.7 2 养分管理 Fertilization 1.0 1.0 1.0 10.1 8.3 9.2 4.1 3 品种 Variety 1.1 0.5 0.8 9.3 4.2 6.7 3.4 4 防病 Fungicide 1.0 0.5 0.7 8.9 3.8 6.3 3.8 5 土壤耕作 Tillage 0.8 0.4 0.6 7.7 3.3 5.5 3.3