干旱区生态环境知识资源中心(Arid): 干旱区荒漠景观植被自然更新机制初探

Arid

	干旱区荒漠景观植被自然更新机制初探
其他题名	Preliminary Study on the Mechanism of Natural Regeneration of Vegetation in Desert Landscapes in Arid Areas
	刘虎俊; 王继和; 马全林; 杨自辉; 詹科杰
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2005
卷号	22 期号:3 页码:301-305
中文摘要	根据实地调查和参阅资料,依山前洪积扇、河流沿岸阶地、沙丘及丘间低地、戈壁、盐沼的景观斑块,探讨干旱区荒漠植被的自然更新机制.干旱区的高温干燥、温差强烈、风蚀沙埋已变为植物繁衍后代的动力;萌孽、劈裂、地下茎萌生等多种繁殖方式,使荒漠植物在严酷的条件下实现自然更新,形成以母株为中心的母系居群.地貌形态和种子传播动力决定了群落外形.在干旱区,繁殖植物的种子成熟期与年内的丰水期相吻合,有利于植被更新;只有在连续2 a降水较大时(超过多年平均降水量),沙丘和丘间地、戈壁植被的自然更新才有可能发生.河流沿岸植被的自然更新受地下水影响最明显.湖盆盐碱地植被带有水生植被的痕迹,自然更新相对较难.景观斑块镶嵌分布,形成微环境均一的廊道,有利于植被的自然更新.
英文摘要	The area of arid regions in China occupies 52. 5% , where it belongs to the typical continental cli-mate, the precipitation is less, strong winds occur frequently, and the aeolian landforms are dominant. Desert vegetation is the main vegetation type in arid regions, and its regeneration relate closely to the sustainable main-tenance and development of all the ecosystems. In this paper, the mechanism of natural regeneration of vegeta-tion in an arid area is preliminarily studied based on the field investigation and the references about the landscape patches of the fore-mountain alluvial-diluvia fans, terraces, dunes, interdune lowlands, Gobi deserts, salty swamps, etc. In the arid areas, the high temperature, aridity, high diurnal-nocturnal temperature difference, wind erosion and sand burying are the driving forces for the plant reproduction; under the severe conditions in arid areas, desert plants can naturally regenerate by many reproduction ways, such as the germination, tillering and rhi7XDmatous germination, thus, the maternal vegetation communities generate by taking the maternal plants as the cores. Landforms and driving forces of seed spread affect the shapes of vegetation communities. In arid areas, the mature stage of plant seeds accords with rainy season, which is advantageous for the regeneration of natural vegetation; only relying on two successive rainy years (the annual precipitation is higher than the aver-age) can the natural regeneration of vegetation growing on dunes, interdune lands and Gobi deserts occur. The regeneration of the riparian natural vegetation affects significantly groundwater depth. In arid areas, the vegeta-tion growing around lakes and in saline or alkaline lands is hydrophyte-like, so its natural regeneration is rela-tively difficult. The corridors with different microscopic environments caused by the inlaid distribution of land-scape patches are advantageous for the natural regeneration of vegetation.
中文关键词	干旱区 ; 荒漠景观 ; 植被 ; 自然更新 ; 机制
英文关键词	arid area desert landscape vegetation natural regeneration mechanism
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2018280
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206233
作者单位	甘肃省治沙研究所, 武威, 甘肃 733000, 中国
推荐引用方式 GB/T 7714	刘虎俊,王继和,马全林,等. 干旱区荒漠景观植被自然更新机制初探[J]. 甘肃省治沙研究所,2005,22(3):301-305.
APA	刘虎俊,王继和,马全林,杨自辉,&詹科杰.(2005).干旱区荒漠景观植被自然更新机制初探.干旱区研究,22(3),301-305.
MLA	刘虎俊,et al."干旱区荒漠景观植被自然更新机制初探".干旱区研究 22.3(2005):301-305.