准噶尔盆地南缘活化沙丘植被自然恢复初探——以梭梭、白梭梭为例

古尔班通古特沙漠边缘植被破坏严重,沙丘活化明显,是新疆干旱区植被恢复的重点地区之一,一般缺乏地表水补充,其沙丘的水分状况便成为植被生存和恢复过程的关键条件。为掌握古尔班通古特沙漠边缘活化沙丘水分状况,并在其上恢复自然植被,对植物生长期内沙丘水分进行连续监测,并采用当地采集的梭梭、白梭梭种子进行植被恢复实验,结果表明:活化沙丘表层存在干沙层,沙丘中部和下部存在稳定湿沙层,处在距沙丘表面60 cm以下,且厚度超过100 cm,具备植被自然恢复的基础,干沙层的形成速率和风蚀是制约活化沙丘植被自然恢复的决定因素。

Initially Searches on South the Songorine Basin the Reason Activation Sand Dune Vegetation Restores Naturally——Take The Sacsaoul, The White Sacsaoul as the Example

The Gurbantunggut desert edge vegetation destruction is serious, the sand dune activation is obvious, is one of key local which the Xinjiang arid area vegetation restores, lacks the surface water to supplement generally, its sand dune moisture comem condition then becomes the vegetation survival and the recovery procedure essential condition, for gasps the Gurbantunggut desert edge activation sand dune moisture content condition, and restores the natural vegetation in above, the sand dune moisture contem carries on the continuous monitoring to the plant vegetal period in, and uses local gathering the sacsaoul, the white sacsaoul seed carries on the vegetation to restore the experiment. The result indicated that, The activation sand dune surface layer existence does the sand bed, middle the sand dune and lower part has the stable wet sand bed, occupies is apart from the sand dune surface 60 cm; below, also thickness surpasses 100 cm, has foundation which the vegetation restores naturally, does the sand bed the formation speed and the wind erosion restricts the determining factor which the activation sand dune vegetation restores naturally. Key words： activation sand dune; does the sand bed; stable wet sand bed; nature restoration