氮钾营养与葡萄植株生长、产量及品质的关系

土壤中Ｎ、Ｋ供应状况是影响葡萄产量和品质的主要因素．土壤Ｎ、Ｋ供应充足，葡萄枝条和根系生长良好，浆果产量提高Ｎ、Ｋ两种元素对浆果产量存在正交互作用．在本试验条件下，提高供Ｋ水平。浆果可溶性固形物和糖分含量显著增加，而浆果的含酸量随供Ｎ量的增加而增加．本研究证实，福建红壤区土壤有效钾不足是葡萄生产的主要障碍因子．盆栽试验证明；如果施Ｎ过多而增施Ｋ肥．不但无法减轻过量Ｎ的危害，反而会促进土壤Ｎ的释放，加剧过量Ｎ的不利影响．

Relationship Between Nitrogen and Potassium Nutrition and the Yield, Quality and Growth of Grape

The supply Conditions of N-K to the soil were main factors in determining grape yield and fruit quality. The vines and roots grew well, and the yield increased with adequately supplying N-K for the soil. There was a positive interaction between N and K on the yield.Under the experimental condition when the supplying of K was raised, fruit soluble solids and sugar content significantly increased 5 and fruit acidity increased with raising N supply.The studies showed that the shortase of available K in soil was the main barrier factor in grape production in red earth area of Fujian. Pot experiments indicated when.application N was excessive, applying K could not relief the disadvantages caused by N excess,but aggravate them by hastening N release in soil.