磷素是早稻必需的营养元素之一。缺磷时,水稻迟发坐蔸,根系瘦弱,分蘖减少,开花延缓,成熟推迟,产量降低。据我省第二次土壤普查对45个验收单位的统计结果,土壤速效磷含量小于10ppm的缺磷面积占耕地总面积的71％左右,成为我省发展农业生产的重要障碍。近年来,各地针对缺磷问题, Phosphorus is one of the essential nutrients for early rice. When phosphorus is lacking, rice lacks sedentary foliage, the root system is emaciated, the number of tillers is reduced, the flowering is delayed, the maturation is delayed, and the yield is reduced. According to the statistics of 45 acceptance units of the Second Soil Survey of our province, the phosphorus deficiency area with soil available phosphorus content less than 10ppm accounts for about 71% of the total cultivated land, becoming an important obstacle to the development of agricultural production in our province. In recent years, all over the problem of lack of phosphorus,