为克服盲目施肥现象,尤其在磷肥不足的情况下,因地制宜、经济有效地施用磷肥是极待解决的问题。1983年我们参阅国内外材料和在顺义县的试验结果提出了对冬小麦按土壤有效磷分级建议施磷(表1,本文中土壤有效磷、磷肥磷、水溶性磷等均指P_2O_5—下 In order to overcome the phenomenon of blindly fertilizing, especially in the case of insufficient phosphate fertilizer, the application of phosphate fertilizer economically and efficiently according to local conditions is a problem to be solved. In 1983, we refer to the domestic and foreign materials and the test results in Shunyi County, proposed the classification of soil available phosphorus for winter wheat suggested phosphorus (Table 1, soil available phosphorus, phosphate fertilizer, water-soluble phosphorus, etc. refer to P2O5-