Fuji apple was taken as object to observe the effects of different nitrogen and potassium fertilizer to the yield and quality, results indicated that in nitrogen fertilizer treatment , average fruit product per plant was apparently higher than control;the highest yield per plant was 86.9 kg that applied 1.0 kg nitrogen per plant .In potassium fertilizer treatment , there was no significant change in individual plant product;the variation was from 77.3 to 79.2 kg per plant.In nitrogen and potassium fertilizer dual disposal treatment , average fruit product per plant was significant higher than control .The highest yield per plant was 98.6 kg that applied 1.0 kg nitrogen+1.0 kg potassium per plant .The maximum fruit firmness was 7.21 kg· cm-2 , which applied 1.0 kg nitrogen+1.0 kg potassium per plant .The maximum total sugar was 12.56%, when 1.5 kg nitrogen+1.5 kg potassium per plant was applied .%以红富士苹果为对象，施入不同水平的氮、钾肥，观察其对产量及其品质的影响，结果表明：在单独施用氮肥的处理中，果实单株平均产量明显高于对照，以施用氮肥1．0 kg／株处理的产量最高，为86．9 kg／株；在单独施用钾肥的处理中，果实单株产量变化不明显，变动在77．3～79．2 kg／株之间；在氮、钾肥混合处理中，果实单株平均产量显著高于对照，以施用氮肥1．0 kg／株＋钾肥1．0 kg／株处理的产量最高，为98．6 kg／株。在果实硬度方面，以施用氮肥1．0 kg／株＋钾肥1．0 kg／株处理的硬度最大，为7．21 kg· cm-2；在总糖方面，以施用氮肥1．5 kg／株＋钾肥1．5 kg／株处理的糖含量最大，为12．56％。
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