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在中等偏上土壤肥力棕壤上开展玉米氮磷钾5处理田间试验。试验结果表明,玉米100kg产量吸氮量为1.81kg～2.53kg,不同施肥配比养分吸收量不同,施肥配比越全面,吸氮量越多;100kg吸磷量(P2O5)1.1kg左右;100kg吸钾量(K2O)1.5kg左右。尿素中氮素利用率50%;普通过磷酸钙中磷(P2O5)利用率为18.8%,氯化钾中钾素利用率为36.5%,尿素和过磷酸钙的利用率较正常,氯化钾利用率偏低,说明氯化钾施用量偏高。土壤氮的校正系数为46.9%,土壤中磷的校正系数为66.1%,钾的校正系数为51.4%。
A field experiment on N, P, K treatment of maize was carried out on middle-upper soil fertility brown soil. The results showed that the yield of nitrogen in 100kg corn was 1.81kg ~ 2.53kg, the nutrient uptake of different fertilization was different, and the more the proportion of fertilization was, the more the amount of nitrogen uptake was; the Pkg of 100kg was about 1.1kg; Potassium absorption (K2O) about 1.5kg. Urea nitrogen utilization rate of 50%; common superphosphate phosphorus (P2O5) utilization rate of 18.8% potassium chloride potassium utilization rate of 36.5% urea and superphosphate utilization than normal potassium chloride Low utilization, indicating high levels of potassium chloride. The correction coefficient of soil nitrogen was 46.9%, the correction coefficient of phosphorus in soil was 66.1%, and the correction coefficient of potassium was 51.4%.