It used the orthogonal regression rotary combinative design of 4 factors and five levels for the experiment in Longhai of Fujian. The high quality potato, Zhoushu 3, was employed to evaluate the production effect by varying planting density, as well as nitrogen, phosphate and potassium fertilizations. The result showed that the effect of the four factors decreased in that order. The mathematical models allowed the selection of a potato with a yield greater than 35832.75 kg·hm-2 at 95％ confidence level. In addition, the range for the planting density was 70245 to 72435 strain·hm-2, the urea application, 349.79 to 384. 89 kg·hm-2 , the calcium superphosphate application,461.81 to 558.20 kg·hm-2 ,and the potassium sulfate application,550.56 to 621.6O kg·hm-2. For agronomic practices, the medium values for the planting density was 71 340 strain·hm-2,and for the urea, calcium superphosphate and potassium sulfate application rates were 367.34 kg·hm-2, 510.00 kg·hm-2 and 586. 08 kg·hm-2,respectively%在福建马铃薯主产区龙海,采用4因素5水平正交旋转组合设计,研究种植密度及不同尿素、过磷酸钙、硫酸钾施用量对优质菜用马铃薯品种中薯3号产量的影响.结果表明,4种因素对产量的影响程度的大小依次为种植密度、N肥、K肥、P肥.经计算机上模拟寻优,获得了该品种高产栽培数学模型.产量高于35 832.75kg·hm-2的优良组合方案215套,其95%的置信区域为种植密度70 245～72 435 株·hm-2,施尿素349.79～384.89 kg·hm-2过磷酸钙461.81～558.20 kg·hm-2、硫酸钾550.56～621.60 kg·hm-2;农艺措施中心值为种植密度71 340株·hm-2,施尿素367.34 kg·hm-2、过磷酸钙510.00 kg·hm-2、硫酸钾586.08 kg·hm-2.
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