洋槐和垂柳树干液流速度与解剖结构的关系

应用热脉冲技术(Heat-pulse technique)和木材解剖学方法，研究了洋槐(Robinia Pseudocacia L)和垂柳(Salix babylonica L)两树种树干液流速度变化和其与木材解剖结构的相关性。结果表明：在自然状态下，环孔材洋槐的最大液流速度出现在靠近形成层的最外层生长轮中；而散孔材垂柳在靠近形成层的几个生长轮中都有较高的液流速度。两树种的液流速度与其解剖结构有密切关系。另外，两树种的最大液流速度具有相同的日变化趋势。

A study on the relationship between stem anatomical structures and sapflow velocity of Robinia Pseudoacacia L. and Salix babylonica L.

The heat pulse technique and wood anatomy methods were applied to the study of the relationship between stem sap - flow velocity and wood anatomical structure of Robinia Pseudoacacia L. and Salix babylonica L. . The results showed the maximum sapflow velocity of ring - porous trees Robinia Pseudoacacia L. at the outermost ring under the nature condition. Namely the outermost ring takes on the main transport function. In the diffuse - porous tree Salix babylonica L. ,there were higher sap - flow velocity at several rings under the cambium. There was close relationship between sapflow velocity and vessel characteristics. The flow velocity of both trees showed the same diurnal changes.