干旱区生态环境知识资源中心(Arid): 包兰铁路沙坡头段人工植被区生境与植被变化研究

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	包兰铁路沙坡头段人工植被区生境与植被变化研究
其他题名	Changes of Habitat and Vegetation in Man-made Vegetation Area of Shapotou Section Along Baotou-Lanzhou Railway
	于云江 1; 林庆功 2; 石庆辉 3; 刘家琼 3
来源期刊	生态学报
ISSN	1000-0933
出版年	2002
卷号	22 期号:3 页码:433-439
中文摘要	综合土壤、气候、植被等诸多因子，结合时间尺度上的环境变迁对植被的变化进行了研究。结果表明，（1）沙子水分随着人工植被建立时间延长而线性地减少，30a后人工植被的水分得以稳定，对降水量增加的响应也变弱。（2）虽然人工植被盖度有所下降，但以油蒿为建群种的群落能够适应沙坡头环境的变化，不断的自我繁衍，保持可持续性。（3）随着环境的变化，该地的生物多样性增加了；藻类、藓类以及浅根性植物和动物等的侵入，使简单的人工植被已演变到多层次的复杂的人工＋自然生态系统。该生态系统能够维持草原化荒漠条件下较高的盖度，有利于沙面形成结皮并向成土过程发育，从而可保持固沙系统较长时间的稳定。
英文摘要	This paper studied on the changes of habitat and vegetation in the man-made vegetation area of Shapotou section along Baotou-Lanzhou railway and consequently analyzed the sustained capacity of the vegetation. By analysizing climatic data for decades of years, changing trendency of precipitation and soil water content at Shapotou was indicated; the wind-erosing (or wind-cumulation) depth and patch bondage in "flowing part" were measured each month to learn about vegetation degradation. The resistant capacity of sandy crust against wind-sand fluid was measured in the wind-tunnel lab; all samples for vegetation coverage were by 10m * 10m. the result showed, (1) Sand water contents linearly decline with ages of vegetation within less than 30 years. Thereafter, its response to precipitation weakens (2) As the artificial vegetation coverage declined, some species of vegetable stood the test of adversity environment and existed. FOr example, especially, Artemisia ordosia ordosia could adapt to the environmental change at Shapotou and it can self-reproduce and, thereby form Artemisia ordosia community. As vegetation gets old, the shrub coverage decreases, and meanwhile grass coverage increases, thereby making the whole coverage sustainable. (3) With environmental change, the biological diversity increases. Encroachment of alga, moss, flat-root vegetable and animals transforms the simple man-made vegetation to the multi-purpose, complicated man-made and natural ecological system. This ecological system can maintain certain vegetation coverage in desert and grassland areas. it is favorable to form sand-crust and soil and further keep controlling-sand system sustainable.
中文关键词	人工植被 ; 稳定性 ; 沙结皮 ; 复合生态系统
英文关键词	man-made vegetation sustaining sandy crust compound ecological system
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOCHEMISTRY MOLECULAR BIOLOGY
WOS研究方向	Biochemistry & Molecular Biology
CSCD记录号	CSCD:1045581
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203376
作者单位	1.北京师范大学资源科学研究所, 环境演变与自然灾害教育部重点试验室, 北京 100875, 中国; 2.兰州铁路局中卫固沙林场, 中卫, 宁夏 751702, 中国; 3.中国科学院沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	于云江,林庆功,石庆辉,等. 包兰铁路沙坡头段人工植被区生境与植被变化研究[J]. 北京师范大学,2002,22(3):433-439.
APA	于云江,林庆功,石庆辉,&刘家琼.(2002).包兰铁路沙坡头段人工植被区生境与植被变化研究.生态学报,22(3),433-439.
MLA	于云江,et al."包兰铁路沙坡头段人工植被区生境与植被变化研究".生态学报 22.3(2002):433-439.