我区是个古老的葡萄栽培区,龙眼葡萄集中分布在桑于河、洋河合流处的怀来、涿鹿县暖温盆地。全区原有葡萄12700亩,多为旱地栽培,由于栽培技术落后,年产仅300万斤左右,平均亩产270—300斤,株产10—20斤,其中龙眼葡萄占85%以上,其次 My area is an ancient grape cultivation area, longan grape concentrated in the Sang Yu River, Yanghe confluence of Huailai, Zhuolu County warm basin. The region’s original grape 12700 acres, mostly dry cultivation, due to backward cultivation techniques, with an annual output of only about 3 million kg, an average of 270-300 pounds per mu, strain of 10-20 catties, of which longan grape accounted for more than 85%, followed by