磷肥有固体磷肥和水溶性磷肥,在施用磷肥时,往往把固体磷肥作基肥使用,水溶性磷肥作追肥使用。水溶性磷肥能在较短的时间内提高并维持水体上层的含磷量。一般在使用磷肥时要掌握以下几点: 一、施肥量与施肥时间根据水体大小、水质、水 Phosphate fertilizer has a solid phosphate fertilizer and water-soluble phosphate fertilizer, phosphate fertilizer, the solid phosphate fertilizer is often used as a base fertilizer, water-soluble phosphate fertilizer for topdressing use. Water-soluble phosphate fertilizer in a short period of time to improve and maintain the upper water phosphorus content. The general use of phosphate fertilizer to master the following points: First, the amount of fertilizer and fertilization time according to the size of the water, water, water