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东北平原第四纪环境演化与荒漠化问题
引用本文:林年丰,汤洁.东北平原第四纪环境演化与荒漠化问题[J].第四纪研究,1999,19(5):448-455.
作者姓名:林年丰  汤洁
作者单位:长春科技大学!长春130026
摘    要:东北平原是中国最大的平原,也是全国著名的粮仓。半个世纪以来,荒漠化发展的速度很快,严重影响社会经济的可持续发展。构造一气候旋回,冰期一间冰期气候的波动对第四纪环境的演化起了关键作用,干冷气候可导致沙漠化的发展,湿润气候促使土壤和植被发育,对沙漠化起到了抑制作用。自晚更新世以来,在干、湿气候交替出现的过程中,土壤的苏打化过程和脱苏打化过程也在交替进行。东北平原的沙质荒漠和盐碱荒漠主要是因为人们对土被、植被的破坏所造成的。东北平原是对世纪重要的经济开发区,研究治理该区的荒漠化有重要的战略意义。

关 键 词:第四纪  生态环境  荒漠化  东北平原
收稿时间:1999-07-04
修稿时间:1999-07-13

THE QUATERNARY ENVIRONMENTAL EVOLUTION AND THEPROBLEM OF DESERTIFICATION IN NORTHEAST PLAIN
Lin Manfeng, Tang Jie, Bian Jianmin, Yang Jianqiang.THE QUATERNARY ENVIRONMENTAL EVOLUTION AND THEPROBLEM OF DESERTIFICATION IN NORTHEAST PLAIN[J].Quaternary Sciences,1999,19(5):448-455.
Authors:Lin Manfeng  Tang Jie  Bian Jianmin  Yang Jianqiang
Institution:Changchun University of Science and Technology, Changchun 130026
Abstract:Northeast plain is the biggest plain in China. During the half past century, theareas's soil desertification expanded rapidly at a velocity of 1.4% / a, which deeplyaffected sustainable development of the society and economic.Cycle of structure and climate, and fluctuation of glacial and inter glacial epochtake a key role in the Quaternary environmental evolution. During the Pre-Pleistocene,climate turn from dry and cold to humid. At this time, the earth's crust subsideddelicately, received the deposit of clastic rocks of river face around the basin andformed large scale lake in the center of the basin. At the fare Period ofPre-Pleistocene, the earth crust raised. In early Period of the Middle Pleistocene, theclimate alternated with humid and dry-cold.
Keywords:Quaternary  ecological environment  desertification  northeast plain
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