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磷肥是水稻生长发育必要的肥料,它能刺激水稻根系发育,使幼苗发根快,返青早,分蘗多,茎杆粗壮;也能促进水稻穗部发育,使水稻抽穗早,穗子长,着粒多,谷粒飽滿。采用磷肥沾秧根,縮小磷肥与土壤接触面,提高它的利用效率,达到用量少,成本低,收效大,是經济用肥的有效措施之一。磷肥沾根,固然具有明显的增产效应,但作用大小,常与土壤类型、肥力特性、以及水稻品种等多种因素有关,为摸清这些情况,总結各地試驗資料如下:
Phosphate fertilizer is a necessary fertilizer for rice growth and development, it can stimulate rice root development, seedling hair quickly, early greening back, more tillers, stalks stout; also can promote rice panicle development, so that early rice heading, ear length, grain More, full of grains. It is one of the effective measures to use economic fertilizer to reduce the contact area between the phosphate fertilizer and the soil and to increase the utilization efficiency of the phosphate fertilizer so that the dosage is less, the cost is low and the yield is large. Phosphate fertilizer roots, of course, has a significant yield-increasing effect, but the role of size, often with the type of soil, fertility characteristics, and rice variety and other factors related to find out these situations, summarized the test data are as follows: