不同磷敏感棉花品种临界磷浓度稀释模型与磷营养诊断
庞保刚,曹楠,周治国,赵文青(
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Critical Phosphorus Concentration Dilution Model and Phosphorus Nutrition Diagnosis in Two Cotton Cultivars with Different Phosphorus Sensitivity
PANG BaoGang,CAO Nan,ZHOU ZhiGuo,ZHAO WenQing()
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图4. 各施磷量下棉花磷营养指数（PNI）的变化
Fig. 4. Changes of phosphorus nutrition indices (PNI) of cotton
