海南岛1988—2018年畜禽粪尿氮磷负荷量及环境效应
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Nitrogen and Phosphorus Loads and Their Environmental Effects of Animal Manure in Hainan Island from 1988 to 2018
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图4. 1988—2018年海南岛猪粪当量负荷及耕地负荷预警值 |
Fig. 4. Pig manure equivalent load and alarm value in Hainan Island from 1988 to 2018 |
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