增施钾肥对日光温室葡萄产量和品质的影响

Effects of Application of Potassium on the Yield and Quality of Grape in Greenhouse

通过日光温室葡萄定位施肥试验,研究了钾肥不同施用水平对葡萄产量与品质的影响。结果表明:适量施用钾肥能增加葡萄果实的还原糖、维生素C含量和果粒硬度,糖酸比为34.2~38.3,产量增幅达13.7%~24.0%。采用秋施基肥结合生长期追施方式,施用300 kg hm-2的K2O,且N∶P2O5∶K2O为1∶0.85∶1时,表现出最佳的作用效果和经济效益。

A field experiment was carried out to study the effects of different application rates of potassium on the yield and quality of red globe grape in the greenhouse. The results showed that appropriate amount of potassium could increase the contents of reducing sugar, Vc and fruit firmness. Sugar/acid ratios ranged by 34.2-38.3, and the production could be increased by 13.7% ~ 24.0%. To realize the best efficiency and economic benefit, 300 kg hm-2potassium(K2O) with the ratio of N ∶ P2O5∶ K2 O by 1 ∶ 0.85 ∶ 1 should be applied.