中文摘要：

通过田间试验和室内分析，研究了宁夏贺兰山东麓不同氮肥施用量对风沙土3年生酿酒葡萄赤霞珠生长与产量、品质的影响及施氮肥的经济效益。结果表明：供试土壤有机质肥力、速效氮和速效磷含量较低，而氮素是酿酒葡萄生长发育的决定性指标，对酿酒葡萄生长、产量及品质均有显著影响，但施氮量超过450kg／hm2后抑制新梢生长，产量反而下降。经肥效方程计算得出风沙土3年生酿酒葡萄最高产量施氮量为332．5kg／hm2，最佳经济效益施氮量为305．33kg／hm2。

英文摘要：

A field experiment combined with lab analysis was conducted to study the effect of N fertilizer application amount on the growth, yield and quality as well as on the economic benefits of 3-years-old Cabernet Sauvignon in sandy soil at the eastern foot of Helan Mountain. The results showed that the contents of organic substances, avail P and available K in the soil tested in the experiment were lower. Nitrogen is the most important factor effecting the growth of wine grape. With the enhanced application rate of N fertilizer, the length of new branches, leaves weight, the contents of N, P, K in leaves, as well as the yield of the wine grape were significantly increased along with the increase of N fertilizer application amount less than 450 kg/hm2. However, when the application amount exceeds 450 kg/hm2, the branch length and yield decrease accordingly. The N fertilizer application amount for maximum yield was 332.5 kg/hm2. The N fertilizer application amount for optimal economic benefits was 305.33 kg/hm2.