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为了提高木产叶量 ,以便充分利用资源 ,并为栽培管理提供理论依据 ,以 2a生幼树为试材 ,通过对木新梢生长习性的观察表明 ,复叶的迅速生长期短 ,只有 13～ 2 0d ,从幼叶伸出至可采摘约需 5～ 7d ,采摘以叶长 2 5～ 30cm为宜 ;复叶的数量受树势的影响较大 ,树势强壮时数量多 ,叶面积大 ;叶片的日总光合量约 4 0 0 μmol/ (m2 ·s) (CO2 同化量 ) ,新梢生长初期光合产物向幼叶的转化率很低 ,仅有 6%左右 ;在春季至初夏期间 ,基部留 5叶比留 7叶和 9叶表现采叶量多 ;萌芽期施肥能明显增加采叶量 ,以追施尿素 10g/株表现采叶量最多
In order to improve albino leaf yield in order to make full use of resources and provide a theoretical basis for cultivation management, 2a young saplings as the test material, through the albino shoot growth habit observation showed that the compound leaf rapid growth period is short, Only 13 ~ 20d, from the young leaves can be picked out about 5 ~ 7d, picked to leaf length 25 ~ 30cm is appropriate; the number of compound leaves are more affected by the tree vigor, strong when the tree number of strong, The leaf photosynthesis rate was about 400 μmol / (m2 · s) (CO2 assimilation), and the conversion rate of young photosynthetic products to young leaves at the initial shoot growth stage was very low, only about 6% During the early summer, the leaves with the remaining 5 leaves at the base and 7 leaves at 9 leaves showed more leaf harvesting, and the fertilization at the germination stage significantly increased the leaf harvesting,