水分共享在毛乌素沙地4种灌木根系中的存在状况

为揭示水分共享在毛乌素沙化草地4种沙生灌木根系中的存在状况，选择酸性品红为示踪剂开展野外实验。结果表明，只有沙地柏（Sabina vulgaris)和油蒿（Artemisia ordosica）根系具有共享水分的潜力，而沙柳Salix psammophaila)和杨柴（Hedysarum mongolicum)根系不具有这种潜力。基于酸性品红在细根中的存在状况以及沙子与酸性品红发生中和反应，被步认为沙地柏和油蒿根系可能具有提水作用潜力。

WATER SHARING IN THE ROOTS OF FOUR SHRUBS OF THE MU US SANDY DESERT

Water sharing by roots of four shrubs of the Mu Us sandy desert was studied in field experiments using a tracer, acid fashcin (AF). A potential for water sharing was determined in the roots of Sabina vulgaris and Artemisia ordosica but not in Salix psammophila or Hedysarum mongolicum. Based on the AF regime in the fine roots of these sandy shrubs and neutralisation between AF and sand surrounding the fine roots, we deduced that a potential for hydraulic lift may appear in the roots of both S. vulgaris and A. ordosica. exists