Effect of Different Fertilizer Amounts on Yield of Potato

Effects of different K fertilizer usage and fertilizer deficiency on potato yield were studied with the potato Zhongshu 3 as experimental materials in this experiment.The results showed that the vegetative growth,biomass,distribution rate could be promoted,and thereby the economic yield,commodity rates were enhanced when the amount of K fertilizer was 8.56 kg/667 m2.But it showed a negative effect on economic yield with the excessive application of K fertilizer.It also showed that potato yield reduction were the severest when N fertilizer was lack,followed by K fertilizer and P fertilizer,the organic manure deficiency had the least effects.