干旱区生态环境知识资源中心(Arid): 土壤水分对流动沙丘迎风坡与丘间低地过渡带植被入侵的制约

Arid

	土壤水分对流动沙丘迎风坡与丘间低地过渡带植被入侵的制约
其他题名	Effect of Soil Moisture on Vegetation Invading into Transition Zone between Windward Slope of Active Dune and Interdune Lowland
	闫守刚; 许清涛
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2012
卷号	32 期号:6 页码:1611-1616
中文摘要	在半干旱沙区植物天然更新过程中,种子萌发、幼苗出土是植物种群维持和实现更新的关键阶段。通常认为,在这一阶段,土壤水分和土壤种子库是主要制约因素。分别对流动沙丘迎风坡与丘间低地过渡带的出土幼苗密度与土壤种子库密度和土壤水分进行二元相关分析。结果表明,生长季的出土幼苗密度与土壤种子库密度的相关性未达到显著水平(P>0.05);出土幼苗密度与土壤水分呈显著正相关(P<0.05),而且,幼苗密度随土壤水分呈对数增加。这说明,在植被入侵流动沙丘迎风坡与丘间低地过渡带裸沙的过程中,土壤水分是主要的制约因素,而土壤种子库的制约作用则没有表现出来,植被自然恢复更多地依赖于从沙丘附近植物群落传播来的种子。
英文摘要	During plant natural regeneration process in semi-arid sand area,seed germination and seedling emergence are critical stages for maintaining plant population and realizing plant natural regeneration.Soil moisture and soil seed bank are always thought to be the primary restraining factors in the critical stages.A binary correlation analysis between seedling density and soil seed bank density as well as soil moisture at transition zone between active dune and interdune lowland indicated that the correlation between seedling density and soil moisture was significantly positive in the plant growing season(P<0.05),and the seedling density increased logarithmically with the increasing of soil moisture,but the correlation between seedling density and soil seed bank density was not significant(P>0.05).The results revealed that soil moisture was a main restraining factor in seedling emergence and vegetation establishment at the transition zone between active dune and interdune lowland,while soil seed bank was not;plant natural regeneration depended more on those seeds from plant communities in neighbouring sand dunes.
中文关键词	流动沙丘 ; 过渡带 ; 土壤种子库 ; 土壤水分 ; 出土幼苗
英文关键词	active sand dune transition zone soil seed bank soil moisture seedling
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:4671506
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229072
作者单位	白城师范学院地理系, 白城, 吉林 137000, 中国
推荐引用方式 GB/T 7714	闫守刚,许清涛. 土壤水分对流动沙丘迎风坡与丘间低地过渡带植被入侵的制约[J],2012,32(6):1611-1616.
APA	闫守刚,&许清涛.(2012).土壤水分对流动沙丘迎风坡与丘间低地过渡带植被入侵的制约.中国沙漠,32(6),1611-1616.
MLA	闫守刚,et al."土壤水分对流动沙丘迎风坡与丘间低地过渡带植被入侵的制约".中国沙漠 32.6(2012):1611-1616.