The results of influence of different potassium fertilizer level application on yield and fruit quality of apple showed that potassium fertilizer had obvious effects on yield and quality of fruit.Increasing potassium fertilizer could obviously increase the yield,fruit weight,Vc,protein,soluble sugar content.Increasing a moderate amount of potassium fertilizer could effectively improve the individual quality of Fuji apple,but it showed inhibitory effect when potassium fertilizer beyond the scope of right amo...
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