干旱区生态环境知识资源中心(Arid): 生物土壤结皮对荒漠土壤种子库和种子萌发的影响

Arid

	生物土壤结皮对荒漠土壤种子库和种子萌发的影响
其他题名	Effects of biological soil crusts on soil seed bank and seed germination of desert plants in North China
	苏延桂; 李新荣; 陈应武; 谭会娟; 贾荣亮
ISSN	1000-0933
出版年	2007
卷号	27 期号:3 页码:938-946
中文摘要	研究了腾格里沙漠东南缘在不同自然条件(风、温度、水分)下，人工固沙植被区(24龄、41龄、50龄)和相邻天然植被区的两种生物土壤结皮对荒漠土壤种子库和种子萌发的影响。结果表明，荒漠土壤种子库在苔藓结皮上的储量显著高于藻类结皮。随着生物土壤结皮的发育，种子萌发量在苔藓结皮上增加，在藻类结皮上减少。生物土壤结皮层的含水量对种子萌发有显著的影响(p<0.05)，植物种子在湿润处理的生物土壤结皮上的萌发量高于干燥处理的生物土壤结皮上的种子萌发量。生物土壤结皮表层温度和亚表层温度对荒漠植物种子萌发无显著影响(p>0.05)，但总体而言，对于苔藓结皮，植物种子在较高温度下的萌发量略高于在较低温度下的萌发量，而对于藻类结皮，植物种子在较低温度下的萌发量略高。
英文摘要	We investigated the influences of algae crust and moss crust universally spreading in southeast of the Tengger Desert with four developing phrases (24, 41, 50 yearold crusts in the sandbinding vegetation areas and crusts in natural vegetation) on desert plants. Variable treatments (natural field condition, greenhouse and shadow) were assigned, and two soil moisture regimes were designed to investigate how desert plants responded under different moisture regimes of crusts. Our results showed that seed bank storage was significantly higher in moss crust than in algae crust. With the development of crusts, seed bank storage increased in moss crust while decreased in algae crust. With regard to the moisture, Significant differences in crust moisture were found among four developing phases for both algae and moss crust (p<0.05). The higher moisture kept in crusts, the more seedlings occurred. However, crust surface temperature and subsurface temperature did not have significant effects on seed germination for both crusts (p>0.05). For moss crust, more seed germination occurred under higher surface temperature, contrarily, more seed germination occurred under lower temperature on algae crust.
中文关键词	生物土壤结皮 ; 藻类结皮 ; 苔藓结皮 ; 土壤种子库 ; 种子萌发
英文关键词	biological soil crust moss crust algae crust soil seed bank seed germination
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:2670790
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221326
作者单位	中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	苏延桂,李新荣,陈应武,等. 生物土壤结皮对荒漠土壤种子库和种子萌发的影响[J]. 中国科学院西北生态环境资源研究院,2007,27(3):938-946.
APA	苏延桂,李新荣,陈应武,谭会娟,&贾荣亮.(2007).生物土壤结皮对荒漠土壤种子库和种子萌发的影响.,27(3),938-946.
MLA	苏延桂,et al."生物土壤结皮对荒漠土壤种子库和种子萌发的影响".27.3(2007):938-946.