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迁西县是河北省板栗生产基地,年平均产量1万吨。品优,味美驰名中外。但过去多采用实生繁殖,后代优劣不齐,结果晚、产量低,全县平均株产仅5公斤。为实现早实优质丰产,迁西县从70年代初开始选优嫁接工作,经20年来的培育原后韩庄20号板栗(大叶青)经省市科技人员鉴定,认为是目前我省最优品种。除在全省推广外,陕西、甘肃和福建等省已经引种。目前全县已发展达50万株。深受群众欢迎.大叶青,70年代初在后韩庄山脚下实生树选出,树冠矮小、紧密,枝条短粗,叶片肥大深绿;栗果个大、整齐、饱满。为短枝型板栗,栗蓬圆形,蓬刺较短,蓬内平均有果2.8个,出实率38.6％,每公斤114粒。果实椭圆形,红褐色有光泽,果皮鲜艳,母树龄60年生者,株产达28.5公斤。
Qianxi County is a chestnut production base in Hebei Province, with an average annual output of 10,000 tons. Good product, taste famous at home and abroad. However, the past, the use of real breeding, offspring advantages and disadvantages, the results of late, low yield, the county average yield of only 5 kg. In order to achieve good early yield and good quality, Qianxi County began to select the best grafting work in the early 1970s. After 20 years of cultivation, Hanzhuang No. 20 chestnut (Da Ye Qing) was appraised by provincial and municipal scientific and technical personnel as the most Excellent varieties. In addition to promotion in the province, Shaanxi, Gansu and Fujian provinces have been introduced. At present, the county has developed 500,000 strains. Large leaf green, early 70s at the foot of the South Korean Zhuang Shan tree after the actual election, the crown short, close, short branches thick, dark green leaves; chestnut a large, neat, full. Spur chestnut, chestnut round, spines shorter, average fruit Punta 2.8, the real rate of 38.6%, 114 tablets per kilogram. Oval fruit, reddish-brown shiny, bright peel, tree-age 60 years old, strains up to 28.5 kg.