磷素是水稻生长发育需要的三大要素之一。水稻要从土壤中吸收较多的磷,而土壤中含有的磷往往是不足的,在自然界土壤中一般含磷素(全磷)为0.01—0.22％,变幅较大。辽河下游滨海稻田的各类土壤都普遍缺磷,尤其是土壤中有效磷的含量更少,就是比较肥沃的土壤,随着水稻产量的提高,也需要相应的增施磷 Phosphorus is one of the three essential elements for the growth and development of rice. Rice to absorb more phosphorus from the soil, and the soil contains phosphorus is often inadequate in the natural world of soil containing phosphorus (total phosphorus) of 0.01-0.22%, larger amplitude. All types of soils in the coastal rice paddy in the lower reaches of the Liaohe River are generally deficient in phosphorus. In particular, there is less available phosphorus in the soil, which is more fertile soil. With the increase of rice yield,