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为明确洪泽县水稻适宜磷钾肥施用量,在9个乡镇21个试验点进行了水稻“3414”不完全试验。根据一元二次肥料效应模型拟合分析结果以及土壤磷素、钾素相对产量与土壤磷、钾含量的一元一次拟合分析结果,确定洪泽县水稻比较适宜P2O5用量为60～75 kg/hm2,K2O用量为75～90 kg/hm2。土壤有效磷丰富、中等、低、缺乏指标分别为>18.0 mg/kg、18.0～12.0 mg/kg、12.0～6.0 mg/kg、<6 mg/kg,土壤有效钾丰富、中等、低、缺乏指标为>170.0 mg/kg、170.0～125.0 mg/kg、125.0～80.0 mg/kg、<80.0 mg/kg。
In order to clarify the appropriate amount of P and K fertilizers applied to rice in Hongze County, rice “3414” incomplete test was conducted in 21 experimental sites in 9 townships. According to the results of the fitting analysis of the model of the secondary fertilizer effect and the one-time fitting analysis of the relative yield of soil phosphorus and potassium with the content of phosphorus and potassium in the soil, it was determined that the suitable P2O5 content of the rice in Hongze County was 60-75 kg / hm2 , K2O dosage of 75 ~ 90 kg / hm2. Soil available phosphorus was rich, moderate, low and lacking in indicators of> 18.0 mg / kg, 18.0-12.0 mg / kg, 12.0-6.0 mg / kg, <6 mg / kg, > 170.0 mg / kg, 170.0-125.0 mg / kg, 125.0-80.0 mg / kg, <80.0 mg / kg.