Study on Fertilizer Demand of New Sweet Potato Variety ‘ Xushu 22’
For good benefit from production of high starch variety ‘ Xushu 22’ in southwest of China,the fertilizer demand was studied in this paper.The growth and yield of the cultivar ‘ Xushu 22’ with different quantity of nitrogen and potassium fertilizer was evaluated.The results showed that the fresh weight of the stem was increased while the yield of the tuber was stable with the increase of nitrogen.It indicated the ‘ Xushu 22’ was a fertilizer tolerance variety.With the increase of the amount of potassium fertilizer,the root yield was increased.Slow-release nitrogen fertilizer could decrease the times of fertilization.The yield was same either potassium chloride or potassium sulphate.The recommended amount of the cultivar ‘ Xushu 22’ was N 90-135 kg/hm2,K2O 150 kg/hm2,P2O575 kg/hm2.The slow-release nitrogen fertilizer could be used instead of separately application of fertilizer,which was better than that of one-time applying with ordinary fertilizer.The potassium chloride could be used in sweet potato production instead of potassium sulphate.
NETL
NSTL
万方数据
维普
