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通过对2010～2011年水稻“3414”磷钾二因素肥料效应试验结果进行分析,确定苏北潮盐土地区在土壤有效磷达到12.5 mg/kg、速效钾达到86.6 mg/kg时,水稻施用磷、钾肥增产效果不显著;增加用量后会使其当季利用率降低。推荐本地区(土壤有效磷达到12.5 mg/kg、速效钾达到86.6 mg/kg时)水稻磷(P2O5)、钾(K2O)的施用量分别为45 kg/hm2和22.5 kg/hm2,全部一次性基施。
Through the analysis of the experiment results of the effect of phosphorus and potassium two-factor fertilizer on rice “3414 ” from 2010 to 2011, it was determined that when the soil available phosphorus reached 12.5 mg / kg and the available potassium reached 86.6 mg / kg, Potassium yield increase effect is not significant; increase the amount will make the seasonal utilization rate lower. It is recommended that the application rates of P2O5 and K2O are 45 kg / hm2 and 22.5 kg / hm2 respectively in the region (soil available phosphorus up to 12.5 mg / kg and available potassium up to 86.6 mg / kg) Foundation facilities.