不同栽培技术因子对雨养春玉米产量与氮素效率差异的影响
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曹玉军,姚凡云,王丹,吕艳杰,刘小丹,王立春,王永军,李从锋
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Effects of Different Agronomy Factors on Yield Gap and Nitrogen Efficiency Gap of Spring Maize Under Rain-Fed Conditions
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CAO YuJun,YAO FanYun,WANG Dan,LÜ YanJie,LIU XiaoDan,WANG LiChun,WANG YongJun,LI CongFeng
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表2 增（减）技术因子形成的产量差及技术因子对产量的贡献率
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Table 2 The yield gap formed by increasing and decreasing measure factor and the contribution rate of measure factor to yield
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技术模式
Technical mode | 技术因子
Technique factor | 2017 | 2018 | 平均Average | 产量差
Yield gap
(kg·hm-2) | 贡献率Contribution rate (%) | 产量差
Yield gap
(kg·hm-2) | 贡献率
Contribution rate (%) | 产量差
Yield gap
(kg·hm-2) | 贡献率
Contribution rate (%) | | FP | 与FP比较 Compared with the FP | | +土壤耕作 +Tillage | 361.9 | 3.5 | 523.6 | 5.1 | 442.8 | 4.4 | | +氮肥管理 +N management | 1050.5 | 10.3 | 960 | 9.5 | 1005.3 | 9.9 | | +密度 +Density | 770.8 | 7.6 | 440.9 | 4.4 | 609.9 | 6.0 | | +品种 +Variety | 294.6 | 2.9 | 205.7 | 2.1 | 250.2 | 2.5 | | HH | 与HH比较 Compared with the FP | | -土壤耕作 -Tillage | -594.0 | -4.7 | -678.1 | -5.7 | -571.1 | -5.2 | | -氮肥管理 -N management | -556.2 | -4.4 | -513.8 | -4.3 | -510.0 | -4.4 | | -密度 -Density | -1209.3 | -9.6 | -1279.1 | -10.8 | -1244.2 | -10.2 | | ++密度 ++Density | 760.6 | 6.0 | 483.8 | 4.1 | 622.2 | 5.1 | | +品种 +Variety | 434.5 | 3.5 | 599.8 | 5.1 | 542.2 | 4.3 | | SH | 与SH比较 Compared with the SH | | -土壤耕作 -Tillage | -498.5 | -3.6 | -1182.7 | -9.1 | -840.6 | -6.5 | | -氮肥管理 -N management | -1114.1 | -8.0 | -833.1 | -6.4 | -973.6 | -7.3 | | -密度 -Density | -1507.0 | -10.9 | -908.3 | -6.9 | -1207.7 | -8.9 | | +品种 +Variety | 557.4 | 4.0 | 799.2 | 6.2 | 678.3 | 5.1 |
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