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大雪枣是一种在立冬和小雪之间成熟的特大型晚熟枣变形新品种,具有个大、质优、耐旱、晚熟、丰产、易管理、经济价值高等特点,易于在山区大面积发展.山东省临沭县青石山区和砂石山区野生酸枣树多,分布广,为引进推广大雪枣提供了得天独厚的条件.为此,临沭县水土保持办公室从1995年开始引进大雪枣接穗进行嫁接,当年即开花结果,树冠扩大1～2倍,第二年平均株结果21个,一般单果重50g左右,重的达90g,树冠扩大3～4倍,林地郁闭度达到40%～50%.目前全县已利用野生酸枣树嫁接大雪枣7万余株,1996年售果及接穗收入达70万元,取得了良好的经济效益.现将其栽培管理技术介绍如下.
Jujube jujube is a new type of extra mature jujube jujube mature between early winter and light snow. It has the characteristics of big, good quality, drought resistance, late maturity, high yield, easy management and high economic value, and is easy to develop in large area in mountainous area. Lushu County, Shandong Province, Qingshi mountainous area and gravel mountain wild jujube tree and more widely distributed to promote the introduction of snowy jujube provides a unique condition.To this end, Linshu County Soil and Water Conservation Office since 1995, the introduction of snow scion scion graft, In that year flowering results, the crown to expand 1 to 2 times the average annual results of the second year of 21, the general weight about 50g, weighing up to 90g, tree crown to expand 3 to 4 times, forest canopy closure of 40% to 50%. At present, the county has made use of wild jujube tree grafting more than 7,000 large snow jujube, 1996 sales of fruit and scion income of 700,000 yuan, and achieved good economic benefits now its cultivation and management techniques are as follows.