湖南省近两年来推广复合肥磷酸二氢钾,施用面积达1640万亩以上,平均每亩增产40多斤,最高达到70—80斤。这种肥料无毒无害,性质稳定,含有效成分氧化钾34.85%、五氧化二磷51.72%,适用于水稻、小麦、玉米,油菜等多种作物叶面追肥,而且宜于在阴天或晴天傍晚喷施;雨天、大风天和晴天中午则不宜施用。与碱性化 Hunan Province in recent years to promote compound potassium dihydrogen phosphate, the application area of ​​1640 acres or more, an average yield of 40 kilograms per mu, up to 70-80 pounds. This fertilizer is non-toxic, harmless and stable in nature. It contains 34.85% of potassium oxide and 51.72% of phosphorus pentoxide. It is suitable for leaf top dressing of rice, wheat, corn, rapeseed and other crops, Sunny evening spraying; rainy days, windy days and sunny noon is not suitable for application. With alkaline