Effects of Different Fertilizer Combination on Potato Yield, Biological Traits and Soil Fertility

Xuanshu 2,apotato variety,was tested in field under different fertilizer combination to study the effects on potato yield,agronomic traits and soil fertility.The results showed that the potato yield under different fertilizer combinations increased by 69.82% ~177.85% compared with CK,the potato yield under 1500kg/hm2 slow release fertilizer+ 15 000kg/hm2 organic manure was the highest, followed by under 750kg/hm2 special potato fertilizer+15 000kg/hm2 organic manure.The height,stem diameter,commodity potato rate and chlorophyll content under different fertilizer combinations increased by 82.91%~230.77%,50.65%~72.70%,109.93%~125.18% and 15.95%~23.97% compared with CK separately and the 1 500kg/hm2 slow release fertilizer+15 000kg/hm2 organic manure treatment had the optimum comprehensive effect on Xuanshu 2.The content of N,P and K in potato under different fertilizer combinations increased by 1.09% ~74.24%,2.45% ~20.25% and 37.05% ~56.83% respectively compared with CK.Applying special potato fertilizer plus organic manure can raise effective nutrient content of macro-elements in soil and improve soil fertility level.