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3 增（减）技术因子形成的养分效率差及技术因子对氮素效率的贡献率
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Table 3 The nutrient efficiency gap formed by increasing (decreasing) measure factor and the contribution rate of measure factor to nitrogen efficiency
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技术模式
Technical mode | 技术因子
Measure factor | 2017 | 2018 | 平均 Average | 效率差
Efficiency gap
(kg·kg-1) | 贡献率
Contribution rate (%) | 效率差
Efficiency gap
(kg·kg-1) | 贡献率
Contribution rate (%) | 效率差
Efficiency gap
（kg·kg-1） | 贡献率
Contribution rate (%) | | FP | 与FP比较 Compared with the FP | | +土壤耕作 +Tillage | 1.3 | 3.5 | 1.9 | 5.1 | 1.64 | 4.4 | | +氮肥管理 +N management | 12.2 | 31.2 | 11.8 | 29.8 | 12.0 | 30.5 | | +密度 +Density | 2.8 | 7.6 | 1.6 | 4.5 | 2.2 | 6.0 | | +品种 +Variety | 1.1 | 2.9 | 0.8 | 2.1 | 0.9 | 2.5 | | HH | 与HH比较 Compared with the HH | | -土壤耕作 -Tillage | -2.6 | -4.7 | -3.0 | -5.7 | -2.8 | -5.2 | | -氮肥管理 -N management | -10.7 | -19.0 | -10.7 | -20.3 | -10.7 | -19.7 | | -密度 -Density | -5.4 | -9.6 | -5.7 | -10.8 | -5.5 | -10.2 | | ++密度 ++Density | 3.6 | 6.0 | 2.2 | 4.1 | 2.9 | 5.2 | | +品种 +Variety | 1.9 | 3.5 | 2.8 | 5.1 | 2.4 | 4.3 | | SH | 与SH比较 Compared with the SH | | -土壤耕作 -Tillage | -1.4 | -3.6 | -3.3 | -9.1 | -2.3 | -6.4 | | -氮肥管理 -N management | 8.7 | 23.5 | 8.9 | 27.3 | 8.8 | 25.4 | | -密度 -Density | -4.2 | -10.9 | -2.5 | -6.9 | -3.4 | -8.9 | | +品种 +Variety | 1.5 | 4.0 | 2.2 | 6.2 | 1.9 | 5.1 |
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