干旱区生态环境知识资源中心(Arid): 围封对荒漠草原区沙芦草群落土壤种子库及地上植被的影响

Arid

	围封对荒漠草原区沙芦草群落土壤种子库及地上植被的影响
其他题名	Influence of herbivore exclusion on the soil seed bank and the aboveground vegetation characteristics of Agropyron mongolicum dominant desert steppe grassland
	赵盼盼; 李国旗; 邵文山; 靳长青
来源期刊	草业学报
ISSN	1004-5759
出版年	2018
卷号	27 期号:1 页码:42-52
中文摘要	以宁夏盐池县四墩子荒漠草原沙芦草群落为研究对象,通过室内种子萌发法和地上植被调查法研究了围封对沙芦草群落土壤种子库和地上植被的影响。结果表明:1)围封对沙芦草群落土壤种子库密度具有显著影响,围栏外土壤种子库密度为(1052273)粒·m~(-2),围栏内种子库密度为(1885100)粒·m~(-2),围封使土壤种子库密度增加了79.0%。围封后,一年生植物种数减少了8.2%,种子库密度却增加了44.0%;2)围栏外地上物种数28种,围栏内为32种,围封使地上植被植物种数增加了14.0%。其中多年生植物增加,一年生植物减少;3)围封后,沙芦草群落土壤种子库和地上植被的Margalef丰富度指数、Shannon-Wiener指数、Pielou均匀度指数、Simpson优势度指数均有增大趋势,但差异不显著,而其生活型功能群的多样性发生了不同程度的改变;4)围栏内外土壤种子库与其地上植被的Sorensen相似性系数均为中等不相似,封育样地(0.33)略低于未封育样地(0.35)。种子库之间相似性高达0.71,两个样地地上植被之间的相似性为0.62,二者均为中等相似,说明外界干扰对地上植被的影响要大于对种子库的影响。研究结果可为荒漠草原区植被的恢复与治理提供一定的参考。
英文摘要	Impacts of fencing on the soil seed bank(SSB)and the aboveground vegetation characteristics of an Agropyron mongolicum community in Yanchi County,Ningxia,were studied by germination,and vegetation survey techniques,respectively.The results showed that:1)Herbivore exclosure significantly increased the SSB density.The total count of seeds in the SSB outside the enclosures was(1052273)viable seeds·m~(-2), but was(1885100)viable seeds·m~(-2) inside the enclosures.After herbivore exclosure,the number of annual species decreased by 8.2%,while seed density increased by 44.0%.2)At sampling,there were 28plant species (8annuals+20perennial species)present inside the enclosure and 32species(7annuals+25perennial species) present outside the enclosure.3)After enclosure,values for the Margalef richness index,Shannon-Wiener index, Pielou evenness index and Simpson dominance index of the SSB and the aboveground vegetation showed increasing trends,but the difference was not significant.However,the diversity of life form functional groups changed to some degree.4)The similarity between seed banks of fenced and unfenced areas was 0.71,whereas the similarity between fenced and unfenced aboveground vegetation characteristics was 0.62,indicating that the impact of external disturbance on vegetation was greater than the impact on the seed bank.This study provides reference information useful for the restoration and management of vegetation in desert steppe areas.
中文关键词	沙芦草群落 ; 围封 ; 土壤种子库 ; 地上植被
英文关键词	Agropyron mongolicum community enclosed soil seed bank aboveground vegetation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6158085
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237344
作者单位	宁夏大学;;宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川;;银川, 宁夏;;宁夏 750021;;750021, 中国
推荐引用方式 GB/T 7714	赵盼盼,李国旗,邵文山,等. 围封对荒漠草原区沙芦草群落土壤种子库及地上植被的影响[J]. 宁夏大学,2018,27(1):42-52.
APA	赵盼盼,李国旗,邵文山,&靳长青.(2018).围封对荒漠草原区沙芦草群落土壤种子库及地上植被的影响.草业学报,27(1),42-52.
MLA	赵盼盼,et al."围封对荒漠草原区沙芦草群落土壤种子库及地上植被的影响".草业学报 27.1(2018):42-52.