乌鲁木齐河终端湖区荒漠化过程中土壤植被系统的演替

THE SUCCESSION OF SOILS AND VEGETATION IN DESERTIFICATION IN THE TERMINAL LAKE AREA OF THE URUMQI RIVER

本文漂统地探讨了乌鲁木齐河终端湖区的环境变化过程,并从生境演替的观点出发将乌鲁木齐终端湖区的土壤植被系统概括成四种主要的组合类型,将湖盆荒漠化过程中土壤植被系统的演替分解为四个阶段。从这个规律出发探讨了湖区资源的合理利用。

The Urumqi River is an inland river in the arid zone of northwest China.Because its terminal lake had dried up by the end of the 1960s, desertification occurred and presented four phases(types):aridization, salinization,sandization,and the formation of desert landscape.The succession law of soils and vegetation is Phragmites communis marsh soil→Phragmites communis meadow soil→Tamarix spp.,Karelinia caspica solonchak→Haloxylon arnmodendron,H.Persicurn gray deser- tisol and aeosandisol.According to this succession law,HaIoxyIon a- mmodendron communities will form new shelter-forests under the condi- tion of the rational use of resources.It is necessary to set up the new balance between animals and grasses because of the decline of land pro- ductivity in the desertification.