Effects of Optimal Fertilization on Yield,Nutrient Utilization and Soil Fertility of Edible Sweet Potato
To realize the promotion of quality and efficiency of edible sweet potato,'Yanshu 25'was used as the test variety in the experiment.Four different treatments were set up:no fertilization,customary fertilization,optimized fertilization,optimized fertilization+organic fertilizer.We compared the effects of different fertilization treatments on soil nutrients,yields,dry matter distribution of'Yanshu 25',and absorption and utilization of nitrogen,phosphorus and potassium.The results showed that:fertilization practices improved soil nutrients content effectively.Optimized fertilization+organic fertilizer treatment increased the single potato weight and fresh potato yields significantly of'Yanshu 25',promoted the transport of biological yields and dry matter allocation to sweet potato tuber,increased the accumulation of nitrogen,phosphorus and potassium in stem leaf,tuber and total biomass.The tuber production efficiency of nitrogen and potassium and the harvest index were significantly improved compared with conventional fertilization.
promotion of quality and efficiency'Yanshu 25'optimized fertilizationsoil nutrientsnitrogen,phosphorus and potassium
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