干旱区生态环境知识资源中心(Arid): 乌海周边土壤种子库特征及其与地上植被和土壤因子的关系

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	乌海周边土壤种子库特征及其与地上植被和土壤因子的关系
其他题名	The characteristics of the soil seed bank in Wuhai and surrounding areas and the relationship with vegetation and soil factors
	罗超; 郭小平; 冯昶栋; 叶金鹏; 薛东明
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:11 页码:13-28
中文摘要	土壤种子库是植被自然更新和恢复的物质基础,对干旱荒漠区生态恢复具有重要意义。本研究以内蒙古乌海周边为研究区,选择典型生境和植被类型,通过样地植被调查、持久和短暂土壤种子库采样、萌发试验、土壤理化性质分析,对土壤种子库特征及其与地上植被和土壤因子的关系进行探讨。结果表明:1)乌海及周边土壤种子库平均密度为217~1547粒·m~(-2),物种以多年生草本为主,种子库密度随土壤深度的增加呈下降趋势。持久土壤种子库占种子库总密度的17.34%~64.22%,且轻度和中度干扰样地的持久种子库占比达40%以上。2)不同生境和植被类型下的土壤种子库差异较为显著,相近地理环境下的土壤种子库具有一定相似性,但中度干扰下的样地种子库密度和物种多样性要高于周边轻度干扰的样地。3)新星矿区周边土壤种子库与地上植被相似性较高,其他区域土壤种子库与地上植被在组成和结构上存在较大差异。4)土壤种子库物种在不同土壤环境中呈现不同的聚类,土壤因子只能部分(30%~40%)反映土壤种子库特征。影响0~5 cm和5~10 cm持久土壤种子库的最主要土壤因子分别为有机质、粉粒、黏粒含量和砾石含量,影响0~5 cm和5~10 cm短暂土壤种子库的最主要土壤因子分别为全磷、黏粒含量和容重、有机质。上述研究可为乌海周边表土种子库的植被恢复潜力及恢复技术提供理论依据和支撑。
英文摘要	The soil seed bank is the driver of natural vegetation renewal and restoration and is important for ecological restoration in arid desert areas. The aim of our study was to explore the characteristics of the soil seed bank and its relationship with aboveground vegetation and soil factors in arid desert areas. In this research,the study area was Wuhai City,Inner Mongolia,and its surrounding districts and 12 typical habitats and vegetation types within the study area were selected based on factors such as topography,soil,vegetation and degree of disturbance. The characteristics of the soil seed bank and its relationship with aboveground vegetation and soil factors were evaluated based on botanical investigation,persistent and transient soil seed bank sampling in different seasons,germination experiments and analysis of soil physical and chemical properties. It was found that:1) The average seed bank density in study area was 217-1547 seeds·m~(-2),most of which were perennial herbs. The seed density decreased with increase in soil depth. The persistent soil seed bank accounted for 17.34%-64.22% of the total seed bank density. In habitats of intermediate or low disturbance,its proportion was typically more than 40%. 2)The soil seed banks in different habitats and vegetation types differed significantly, while the soil seed banks of adjacent geographical environments were similar. However,the seed bank density and species diversity of intermediate disturbance areas were higher than perimeter zones of low disturbance. 3)The similarity between the soil seed bank and aboveground vegetation in the Xinxing mining area was relatively high,while the composition and structure of the seed bank and vegetation in other areas were quite different. 4)Soil seed bank species showed different clustering in different soil environments. Soil factors only partly explained(typically 30%-40% of data variation)the soil seed bank variation. Soil organic matter and silt content were the most important soil factors affecting the persistent soil seed bank for the 0-5 cm,while clay content and gravel content were also important for the on 5-10 cm soil depth. By contrast,soil total phosphorus and clay contents were the main factors affecting the transient soil seed bank for the 0-5 cm soil depth,while organic matter content and soil bulk density were also important in the 5-10 cm depth. The research provides data on the composition of the topsoil seed bank to support vegetation restoration programs in the Wuhai region.
中文关键词	干旱荒漠区 ; 生境条件 ; 土壤种子库 ; 地上植被 ; 土壤因子
英文关键词	arid desert areas habitat conditions soil seed bank aboveground vegetation soil factors
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:7091179
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377532
作者单位	罗超, 北京林业大学水土保持学院, 北京 100083, 中国.; 郭小平, 北京林业大学水土保持学院, 北京 100083, 中国.; 冯昶栋, 北京林业大学水土保持学院, 北京 100083, 中国.; 薛东明, 北京林业大学水土保持学院, 北京 100083, 中国.; 叶金鹏, 中国能源建设集团云南省电力设计院有限公司, 昆明, 云南 650051, 中国.
推荐引用方式 GB/T 7714	罗超,郭小平,冯昶栋,等. 乌海周边土壤种子库特征及其与地上植被和土壤因子的关系[J],2021,30(11):13-28.
APA	罗超,郭小平,冯昶栋,叶金鹏,&薛东明.(2021).乌海周边土壤种子库特征及其与地上植被和土壤因子的关系.草业学报,30(11),13-28.
MLA	罗超,et al."乌海周边土壤种子库特征及其与地上植被和土壤因子的关系".草业学报 30.11(2021):13-28.