Abstract: 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 kgm-2 at 95% confidence level.In addition,the range for the planting density was 70245 to 72435 strainm-2,the urea application,349.79 to 384.89 kgm-2,the calcium superphosphate application,461.81 to 558.20 kgm-2,and the potassium sulfate application,550.56 to 621.60 kgm-2.For agronomic practices,the medium values for the planting density was 71 340 strainm-2,and for the urea,calcium superphosphate and potassium sulfate application rates were 367.34 kgm-2,510.00 kgm-2 and 586.08 kgm-2,respectively.