水稻高产稳产需要多种养分均衡供应,当土壤中缺乏或富集某一种养分时,会影响水稻对其他养分的吸收利用,其中尤以氮磷相互关系较为密切。氮素固然是决定作物产量水平的主要条件,缺磷则氮的同化过程迟缓,而磷对作物增产幅度高低,在很大程度上又取决于速效氮的协调供应。在农业生产实践中,各地针对土壤营养状况,试验推广氮磷配合的结果,不论肥田瘦田均较单独使 High and stable rice yield requires a variety of balanced supply of nutrients, when the soil is lacking or enrichment of certain nutrients, it will affect rice absorption and utilization of other nutrients, especially in nitrogen and phosphorus are more closely related. Although nitrogen is the main factor that determines the level of crop yield, the assimilation of nitrogen is slow when phosphorus is deficient. However, the rate of increase of crop phosphorus by phosphorus is to a large extent dependent on the coordinated supply of available nitrogen. In the practice of agricultural production, all over the soil nutrient status, the experiment to promote the results of nitrogen and phosphorus, regardless of fertilizer Tian lean than alone