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1975～1977年,在张家口老葡萄产区进行龙眼品种芽变普查中,发现了果皮由紫红色变为黄绿色的芽变——“白龙眼”。据随后多年的初步观察,白龙眼除果皮色泽变异外,其它主要特性均保持了龙眼这一优良酿酒品种的特性,这对于丰富龙眼葡萄酒酒型具有一定意
From 1975 to 1977, in Zhangjiakou old grapes producing longan variety budding survey, found the peel from purple to yellow-green bud change - “white longan.” According to the subsequent years of preliminary observation, Bailong other than peel color variation, the other main characteristics of the longan have maintained the characteristics of this fine variety of wine, which is rich in longan wine wine type has a certain meaning