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采用四因子二次通用旋转设计，研究了砂土地施用有机肥、氮肥、磷肥和钾肥对花生产量的作用及最适配比和因子之间的交互作用及其对土壤肥力的影响。结果表明：有机肥、氮肥、磷肥和钾肥与花生产量呈二次回归关系，砂土地要提高产量和培肥地力应立足于肥料配合施用，重施有机肥，酌情多施钾肥和磷肥。
The effect of organic manure, nitrogen fertilizer, phosphate fertilizer and potash fertilizer on the yield of peanut and the interaction between the most suitable ratio and the factors and their effects on soil fertility were studied by the four-factor quadratic universal rotation design. The results showed that the organic fertilizer, nitrogen fertilizer, phosphate fertilizer and potash fertilizer had a quadratic regression relationship with the yield of peanut. To improve yield and fertility of sand land, we should base on the combination of fertilizers, re-application of organic manure and application of potassium fertilizer and phosphate fertilizer as appropriate.