怎样提高磷酸二铵的利用率磷酸二铵是当前广大农民喜欢使用的优质高浓度的氮磷复合肥。笔者近期调查，农民反映增产作用不如头几年好。磷酸二铵肥效下降，不仅国产二铵如此，美国二铵同样也不如以往增产作用高。原因主要是磷酸二铵利用率下降所致。而磷酸二铵连年过量施用... How to improve the utilization of diammonium phosphate DAP is currently favored by farmers use high-quality high-concentration nitrogen and phosphorus fertilizer. A recent survey by the author shows that farmers are not as good as the first few years in increasing their output. Diammonium fertilizer decreased efficiency, not only domestic diammonium so, the United States is also not as good as diammonium high yield. The main reason is the decline in the utilization of diammonium phosphate. And diammonium phosphate overdose successive years ...