近日,山东省郯城县林业技术人员在该县的重坊镇,惊奇地发现了3株存在着明显嫁接痕迹的树龄达千年以上的古银杏树。这表明千年以前的古人已掌握了嫁接技术,这一发现在本县尚属首次。自6月份以来,郯城县在全县范围内开展了声势浩大的银杏产业普查工作。在重坊镇倪楼、铺里、东高 Recently, Tancheng County, Shandong Province, forestry technicians in the county’s Chongfang town, surprised to find that there are three obvious traces of grafting up to more than a thousand years old ginkgo tree. This shows that the ancestors millennia ago have mastered the grafting technology, the discovery is the first time in our county. Since June, Yuncheng County has conducted a massive census industry census within the county. In the heavy Square, Ni House, Shop, East High