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我们淮阴地区大部分土壤中有效磷含量都很低,一般在5ppm(百万分数)左右。各种作物施用磷肥都有增产效果,但其肥效的大小,常因土壤条件,施肥水平和作物种类的不同而有差异。在当前磷肥数量不能满足需要的情况下,应把磷肥用在最需要和效果高的地方,而且用量要适当。这里谈谈磷肥分配与施用的一般原则。一、对绿肥和旱作宜重施磷
Most of our soil in Huaiyin area is low in available P, usually around 5ppm (parts per million). All kinds of crops have the effect of increasing production of phosphate fertilizer, but the effect of fertilizer size, often due to soil conditions, fertilization levels and crop types vary. In the current number of phosphate fertilizer can not meet the needs of the situation, the phosphate fertilizer should be used in the most needs and high effect place, and the amount should be appropriate. Here to talk about the general principles of phosphate fertilizer distribution and application. First, green manures and dry should be re-applied phosphorus