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目前我国大部分西瓜园地尤其是南方的西瓜园土壤中氮、磷、钾三要素含量比例失调。这是因为西瓜农普遍重施氮肥,少施或不施钾肥的结果。试验表明,667m2施尿素40～50kg或碳酸氢铵100～
At present, most of watermelon garden in our country, especially in the south of watermelon garden soil nitrogen, phosphorus and potassium content of the three elements imbalance. This is because watermelon farmers generally re-applied nitrogen fertilizer, less or no application of potassium results. Test shows that 667m2 urea 40 ~ 50kg or ammonium bicarbonate 100 ~