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调查表明，湖北省红薯施用化学氮（Ｎ）、磷（Ｐ２Ｏ５）肥分别平均为１３２．０ｋｇ／ｈｍ２和４３．５ｋｇ／ｈｍ２，基本不施用化学钾肥和微量元素肥料。研究结果表明，平衡施肥可以促进红薯获取高产，氮磷钾肥施用比例（Ｎ∶Ｐ２Ｏ５∶Ｋ２Ｏ）以１∶０．４～０．５∶０．８～１．０为宜，其中氮肥（Ｎ）用量以１５０～２２５ｋｇ／ｈｍ２、钾肥（Ｋ２Ｏ）以１２０～２２５ｋｇ／ｈｍ２为好，氯化钾可以作为红薯钾肥来源，同时应根据实际情况配合施用锌、钼等微量元素肥料。
The survey shows that the application of chemical nitrogen (N) and phosphorus (P2O5) fertilizers to sweet potatoes in Hubei Province average 132.0kg / hm2 and 43.5kg / hm2, respectively. Chemical potassium and trace element fertilizers are basically not applied. The results showed that balanced fertilization could promote high yield of sweet potato, and the ratio of N, P2O5 and K2O was 1: 0.4-0.5: 0.8-1.0, of which nitrogen (N) The dosage should be 150-225kg / hm2 and K2O should be 120-225kg / hm2. Potassium chloride can be used as the source of potash fertilizer. At the same time, trace element fertilizers such as zinc and molybdenum should be applied according to the actual situation.