黑河流域沙区植被恢复及演替研究——以高台县为例

Study on Restroation and Succession of Natural/Artificial Desert Vegetation in Heihe River Watershed—Take Gaotai County as a Case Study

用机械和植物措施固定流动沙丘后,随着土壤和水分等生态因子的改善,原来适应于流沙环境或弱固定沙地生境的天然植被趋向于适合固定沙丘生长的人工、天然植被。高台沙区人工和天然植被经25 a变化后,多枝柽柳+沙蒿+花棒群落演变为多枝柽柳+油蒿+花棒群落,盖度达到42%,蒙古沙拐枣+多枝柽柳+油蒿群落演变为多枝柽柳+罗布麻+油蒿群落,盖度达到39%,花棒+沙蒿十多枝柽柳+骆驼刺群落演变为多枝柽柳+罗布麻+花棒+油蒿+骆驼刺群落,盖度达65%,沙拐枣+红砂群落被多枝柽柳+骆驼刺所替代。

With fixation of mobile sand dunes,the natUral vegetation that are adaptable to move sands will be replaced by those adaptable to fix sand dunes due to changes of such ecological factors as soil and water. The natural vegetation in Gaotai desert area has changed greatly within 25 years. The original plant community of Tamarix ramosissima ＋Artemisia arenaria ＋Headysarurn scopariurn has changed into the community of Tarnarix rarnosissirna ＋ Arternisia ordosica ＋Headysarurn scopariurn , with vegetation coverage of 42% ; the community of Calligonurn rnongolicurn ＋ Tarnrix rarnosissima ＋Arternisia ordosica has changed into Tamarix ramosissima ＋Apocynum venetum ＋Artemisia ordosica, with the vegetation coverage of 39 % ; the community of Headysarurn scopariurn ＋Arternisia arenaria ＋Tarnarix rarnosisslrna ＋Alhagi sparsi folia has been replaced by Tarnarix rarnosissirna ＋ Apocynurn venetum ＋ Headysarurn scopariurn ＋ Arternisia ordosica ＋ Alhagi sparsifolia , with the vegetation coverage of 65% ;the community of Calligonurn mongolicurn ＋Rearnuria soongorica has been replaced by Tarnarix ramosissima ＋ Alhagi sparsiolia.