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土壤有效磷的水平,是土壤磷素供应水平的指标之一。在最近开展的第二次土壤普查中,我们通过7000多个土壤样本的分析测定(均按Olsen法),对全县耕层土壤中有效磷的分布,已经有了比较清楚的认识。县化肥试验网多年来进行的大量磷肥试验的结果,使我们对不同土壤、不同作物上增施磷肥的反应获得了丰富的资料。综合这二方面的信息,就有可能对我县施用磷肥提出比较合理的方针,从而使磷素化肥的施用,建立在一个比较科学的基础上。
Soil available phosphorus level, is one of the indicators of soil phosphorus supply level. In the second recent soil census, we analyzed the available soil samples (all based on the Olsen method), and we have made a clearer idea of the distribution of available phosphorus in the topsoil of the county. The results of a large number of experiments on phosphate fertilizer carried out by the county fertilizer experiment network over the years have enriched the information we have obtained on the responses of the application of phosphate fertilizer to different soils and crops. Combining these two aspects of information, it is possible to apply phosphorus fertilizer in our county to put forward a more reasonable approach, so that the application of phosphorus fertilizer based on a more scientific basis.