晋南黄土旱塬小麦养分投入与化肥减施经济环境效应评价
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马红梅,曹寒冰,谢英荷,李廷亮,刘凯,张奇茹,姜丽伟,曹静,邵靖琳,武文玥,栗文琪
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Evaluation on Fertilizer Application and Its Economic-Environmental Benefits Associated with Fertilizer Reduction Potential for Dryland Wheat in Loess Plateau of Southern Shanxi Province
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MA HongMei,CAO HanBing,XIE YingHe,LI TingLiang,LIU Kai,ZHANG QiRu,JIANG LiWei,CAO Jing,SHAO JingLin,WU WenYue,LI WenQi
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表5 钾投入和减钾潜力
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Table 5 Potassium input and potassium reduction potential
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钾投入分级
K input level | 指标
Index | 产量水平Yield level（kg·hm-2） | | ≤2200 | 2200-3200 | 3200-4200 | 4200-5200 | >5200 | 平均 Mean | 适中
Middle | FF（kg K2O·hm-2） | 15.1 | 20.3 | 33.0 | 36.3 | 72.0 | 35.3 | | RF（kg K2O·hm-2） | 14.9 | 21.7 | 32.2 | 36.9 | 73.0 | 35.7 | | RN（kg K2O·hm-2） | 0.2 | -1.4 | 0.8 | -0.6 | -1.0 | -0.4 | | △(%) | 1.6 | -7.1 | 2.4 | -1.7 | -1.4 | -1.1 | 高
High | FF（kg K2O·hm-2） | 15.0 | 25.5 | 36.4 | 45.0 | 64.3 | 37.2 | | RF（kg K2O·hm-2） | 12.6 | 21.0 | 29.9 | 36.8 | 54.6 | 31.0 | | RN（kg K2O·hm-2） | 2.4 | 4.5 | 6.4 | 8.2 | 9.6 | 6.2 | | △(%) | 15.7 | 17.7 | 17.7 | 18.2 | 15.0 | 16.7 | 很高
Very high | FF（kg K2O·hm-2） | 60.4 | 98.9 | 114.8 | 245.5 | 259.0 | 155.7 | | RF（kg K2O·hm-2） | 11.4 | 21.6 | 28.9 | 37.3 | 56.3 | 31.1 | | RN（kg K2O·hm-2） | 48.9 | 77.3 | 85.9 | 208.1 | 202.7 | 124.6 | | △(%) | 81.0 | 78.2 | 74.8 | 84.8 | 78.2 | 80.0 |
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