潮土是我省第二大土类,面积6300多万亩。由于潮土中速效磷含量极度缺乏,限制着农业生产;加之磷的施用量增多,导致生产成本提高。为此,1989年河北省土肥研究所在省科委支持下,进行了潮土难溶性磷活化途径的研究,取得了 Chao soil is the second largest soil in our province, an area of ​​more than 6300 mu. Due to the extremely low availability of available phosphorus in the soil, agricultural production is limited, and the increased use of phosphorus leads to higher production costs. To this end, in 1989, Hebei Institute of Soil and Fertilizer in the support of the Provincial Science and Technology Commission, conducted a wave of soil insoluble phosphorus activation pathway, made