2015•Heilongjiang nongye kexueRequires access
Effect of Fertilizer Quantity and Planting Density on Main Agronomic Trait of Potato
Yang Sheng-xia
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Abstract
In order to make high yield cultivation techniques of potato Bishu 5,the quadric orthogonal rotational regression design of 4factors and 5levels was used to study the effects of fertilizer quantity and planting density on main agronomic trait of potato Bishu 5.The results showed that the effect order of all cultivation factors on yield per plant was densityPKN,the effect order of all cultivation factors on tuber number per plant was densityKPN,the effect order of all cultivation factors on commodity potato rate was PNKdensity.The highest yield per plant of 718 g would be obtained under the cultivation conditions of 54 485.40plants·hm-2,N fertilizer 459.34kg·hm-2,P fertilizer 590.09kg·hm-2,K fertilizer 454.08kg·hm-2.The highest tuber number per plant of 14.8would be obtained under the cultivation conditions of 34 434.60plants·hm-2,N fertilizer 432.18kg·hm-2,P fertilizer 735.08kg·hm-2,K fertilizer 286.98kg·hm-2.The highest commodity potato rate of 71.18% would be obtained under the cultivation conditions of 58 527.90plants·hm-2,N fertilizer1 011.48kg·hm-2,P fertilizer 2 614.89kg·hm-2,K fertilizer 437.60kg·hm-2.