不同施肥和密度对马铃薯产量的影响

采用二次回归正交旋转组合设计,研究马铃薯单垄双行、高墒栽培的施肥量和密度对产量的影响。结果表明,在一定的用量范围内,施用氮磷钾肥料均能提高马铃薯产量,过量的施用肥料,会造成马铃薯减产。通过数学模型的优化和解析,得出马铃薯单垄双行、高墒,667 m2产量大于2 t的综合栽培技术的施肥量每667 m2为:尿素(16.9~32.9 kg)、普钙(77.4~79.4 kg)、硫酸钾(28.7~39.5 kg)、密度为每667 m2种植3 237~3 782株。

Effect of Fertilization and Plant Density on Potato Yield

The effect of fertilization and plant density on potato yield were studied when planted in two lines within a row of high ridge using the quadratic regression rotation-orthogonal combination design.High rate of NPK increased the potato yield,however,overdose decreased the potato yield.Through the analysis and optimization of the mathematical model,the best combination of NPK fertilizers and density was achieved,i.e.urea 16.9-32.9 kg,normal superphosphate 77.4-79.4 kg,potassium sulfate 28.7-39.5 kg,and the plant density 3 237-3 782 plants on the basis of 667 m2,when the target yield was 2 t or more.