菜地施肥存在的问题及对策一、肥料品种单一，复混肥料施用量小，最突出的问题是没有钾肥的施用。蔬菜是喜钾作物，一般需钾量是大田作物的８～１５倍，对于老菜地由于多年不施化学钾肥，钾源的补充仅靠有机肥，如果有机肥施用不足，往往在老菜地首先表现出缺钾症状。１９... Vegetable fertilization problems and countermeasures First, a single fertilizer varieties, compound fertilizer application rate is small, the most prominent issue is the lack of application of potassium. Vegetables are hi potassium crops, the general amount of potassium required is field crops 8 to 15 times, for many years because of chemical fertilizers in the old vegetable fields without potassium, potassium source alone rely on organic fertilizer, organic fertilizer, if not enough, often in the vegetable area First showed the symptoms of potassium deficiency. 19 ...