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1.磷肥的特点与当前施肥问题磷是作物营养三要素之一,我国大部分土地磷元素缺乏,土壤中的磷一般不能满足作物生长发育的需要,必须通过施磷肥来补充。磷在土壤中容易被固定,在土壤中移动性小,肥效转化慢,作物难以及时吸收利用,磷肥的当季利用率在10%~25%之间。根据溶解度的大小和作物吸收的难易,通常将磷肥划分为水溶性磷肥、弱酸溶性磷肥和难溶
1. The characteristics of phosphate fertilizer and the current fertilization issues Phosphorus is one of the three elements of crop nutrition, most of our land lack of phosphorus, phosphorus in the soil generally can not meet the needs of crop growth and development, must be supplemented by applying phosphate fertilizer. Phosphorus in the soil easily fixed in the soil mobility is small, fertilizer conversion slow, difficult to timely absorption and utilization of crops, seasonal utilization of phosphate fertilizer between 10% and 25%. According to the size of the solubility and the difficulty of crop absorption, the phosphate fertilizer is usually divided into water-soluble phosphate fertilizer, weak acid-soluble phosphate fertilizer and insoluble