By double-factor randomized block field test shoot growth leaf yield and the contents of main medicine components flavonoid and terpin of 3 densities and 4 heading heights in leaf-use Ginkgo biloba forest were tested .

利用双因素随机区组试验 设计，研究了3 种密度与4 种 定 干高度对叶用银杏Gingobiloba枝梢生长量、叶片产量及叶片主要 有效药用成分黄酮和 内酯含量的影响。

The contents of leaf flavonoid and terpin content decreased with the increase in the heading height .

叶片黄酮和 内酯含量 随 定 干高度的降低而增加；