干旱区生态环境知识资源中心(Arid): 库布齐沙漠东段不同演替阶段沙丘土壤种子库变化特征

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	库布齐沙漠东段不同演替阶段沙丘土壤种子库变化特征
其他题名	Characteristics of Soil Seed Bank of Sand Dune in Different Succession Stages in the Eastern Kubuqi Desert
	于洁 1; 高丽 2; 闫志坚 2; 王育青 2
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2015
卷号	37 期号:4 页码:80-85
中文摘要	选择库布齐沙漠东段固定沙丘、半流动沙丘和流动沙丘样地,应用空间代替时间的方法研究沙丘演替过程中土壤种子库物种组成、空间分布和数量变化特征,结果表明:沙丘土壤种子库共出现9科22种植物,以一年生草本植物为主,占56.3%~66.7%;不同演替阶段沙丘土壤种子库密度为固定沙丘>半流动沙丘>流动沙丘,0~20cm土层密度分别为2275.56304.51粒/m~2、2099.26364.45粒/m~2、1183.71194.03粒/m~2;土壤种子库密度随着土壤深度增加明显降低,主要集中在0~5cm土层,占全部种子库的68.6%~80.1%;不同演替阶段沙丘土壤种子库之间相似性低,相似系数变化范围为0.29~0.48,处于中等不相似水平;地上植被与土壤种子库之间的相似性较高,相似系数变化范围为0.65~0.70,处于中等相似水平。
英文摘要	Using the method of substituting space for time, the species composition and vertical distribution pattern in soil seed bank in the different succession stages (fixed dune, semi-mobile dune, mobile dune) were studied in the eastern Kubuqi desert. The results showed that there were 9 families, 22 species in the soil seed bank. Annual herb varied from 56.3% to 66.7%. The soil seed bank density of mobile dune was 1183.71194.03seed/m~2, semi-mobile dune was 2099.26364.45seed/m~2, and fixed dune was 2275.56304.51seed/m~2. With the increase of soil depth, density of soil seed bank decreased obviously, mainly in 0~5cm soil layer, accounted for 68.6%~80.1% of total soil seed bank. Similarity of soil seed bank in different succession stages were less, similarity coefficients ranged from 0.29~0.48, which were considered as having a moderate dissimilarity level. Similarity coefficients between aboveground vegetation and soil seed bank were more larger, similarity coefficients ranged from 0.65~0.70, showed a moderate similarity level.
中文关键词	库布齐沙漠东段 ; 土壤种子库 ; 相似性 ; 演替
英文关键词	Eastern Kubuqi desert Soil seed bank Similarity coefficients Succession
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:5489769
来源机构	中国农业科学院草原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233655
作者单位	1.中国农业科学院研究生院, 北京 100081, 中国; 2.中国农业科学院草原研究所, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	于洁,高丽,闫志坚,等. 库布齐沙漠东段不同演替阶段沙丘土壤种子库变化特征[J]. 中国农业科学院草原研究所,2015,37(4):80-85.
APA	于洁,高丽,闫志坚,&王育青.(2015).库布齐沙漠东段不同演替阶段沙丘土壤种子库变化特征.中国草地学报,37(4),80-85.
MLA	于洁,et al."库布齐沙漠东段不同演替阶段沙丘土壤种子库变化特征".中国草地学报 37.4(2015):80-85.