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对叶用银杏大佛指品种 1年生、2年生和 3年生实生苗分别以不同留桩高度截干 (或抹顶芽 )处理 ,并对截干后当年的生长及树形指标进行调查。结果表明 :(1 )截干能矮化树体 ,扩大冠幅 ,减少光秃带距 ,加大部分处理树冠总体积 ;(2 )截干能增加部分处理枝条数量及枝条总长 ;(3)对当年叶产量影响最大的指标分别为地径、长枝数、长枝长、高幅比及冠长比。因此截干能促进银杏形成优质叶用树形
On the leaves of Ginkgo biloba, the 1-year, 2-year-old and 3-year-old seedlings were truncated (or sprouted) with different pile height, and the growth and dendrogram of the year were investigated. The results showed that: (1) truncation of stems could dwarf the tree, enlarge the crown width, reduce the bare band distance, and increase the total volume of part of the crown; (2) truncation increased the number of branches and total length of branches; (3) The most influential indicators on the leaf yield of the year were the diameter, the number of long branches, the length of long branches, the high amplitude ratio and the crown-length ratio. Therefore, truncation can promote the formation of high-quality leaves with ginkgo tree