长期定位施肥对潮土剖面养分分布的影响
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Effect of Long-Term Fertilization on Nutrient Distribution of Fluvo-Aquic Soil Profile
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图4. 长期定位施肥土壤剖面有效磷和速效钾含量 |
Fig. 4. Available P and K content in soil profile under different fertilization regimes |
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