【摘要】 白皮沙拐枣（Ｃａｌｉｇｏｎｕｍｌｅｕｃｏｃｌａｄｕｍ）侧根多水平分布在１０～２０ｃｍ深的浅沙层中，其半径可延伸２０余米，有助于在流动基质上的固着，亦可充分利用荒漠降水以维持正常生长。初步查明，该种植物根系发育与早春融雪期沙丘水分动态密切相关更多还原

【Abstract】 On the basis of investigation of Calligonum leucocladum,we have made it clear that the side roots of (Calligonum leucocladum mainly distribute the shallow layer of sandsoil with the depth of 10 cm or 20 cm and their length can reach over 20 m, which is helpful to the fixation of the plant and absorption of water in sand dunes. It is certain that the growth of roots of this plant has close relations to the water conditions of sand dunes in metting-snow period of early-spring.更多还原