干旱区生态环境知识资源中心(Arid): 河西走廊中部沙漠人工植被中土壤种子库特征

Arid

	河西走廊中部沙漠人工植被中土壤种子库特征
其他题名	Characteristics of soil seed banks in an artificial desert vegetation in the Hexi Corridor
	鲁延芳; 马力; 占玉芳; 甄伟玲; 滕玉风; 钱万建
来源期刊	草业科学
ISSN	1001-0629
出版年	2019
卷号	36 期号:9 页码:2334-2341
中文摘要	土壤种子库在植被恢复中具有极其重要的作用。本研究以河西走廊人工植被为研究对象,采用野外植被调查、定点土样采集与种子萌发试验相结合的方法,研究了人工植被中土壤种子库组成、空间分布以及物种多样性等特征。结果表明:1)土壤种子库共有9种植物,分属3科8属,表现出土壤种子库组成简单,科属种较为集中,一年生植物植株数量占所有种子库植物数量的89.53%。2) 0-2、2-5、5-10 cm土层土壤种子库密度分别为54.71、 58.00、132.86粒·m~(-2),0-5 cm土层土壤种子库密度较小,5-10 cm土层土壤种子库密度较大。3)土壤种子库植物与地上植被的共有物种数多,相似性系数为0.600 8,达到中等相似或极相似水平,表现出较小的空间异质性。土壤种子库植物与地上植物在植物组成种类、数量、密度上正相关。4)不同梯度土壤种子库的多样性指数较低,土壤种子库中的Simpson多样性指数、Shannon-wiener多样性指数(H')、Pielou均匀度指数(E)变化趋势基本一致,随着土层深度增加而增加。
英文摘要	The soil seed bank plays an important role in vegetation restoration. This research determined artificial vegetation seed bank of the Hexi Corridor. We conducted a field vegetation survey with fixed point soil sample collection and a seed germination experiment. Research characteristics of the composition of the soil seed bank in the artificial vegetation and the spatial distribution and species diversity were determined. The results showed that: 1) There were 9 species of plants in the soil seed bank that belonged to 3 families and 8 genera. The soil seed bank was simple. The family of the species were concentrated. The number of annual plants accounted for 89.53 % of all seed bank plants. 2) Seed bank density at 0-2 cm depth was 54.71 grains·m~(-2), 2-5 cm was 58.00 grains·m~(-2), and 5-10 cm was 132.86 grains·m~(-2). At 0-5 cm, the lowest density of the soil seed bank occurred and at 0-5 cm it was the highest. 3) There were numerous common species in the soil seed bank and of ground plants. The similarity factor was 0.600 8. Medium or highly similar levels occurred with lower spatial heterogeneity. There were positive correlations between composition, quantity, and density of ground plants and seed bank. 4) There was a low diversity index for the different gradients in the seed bank. As the depth of the soil increased the trends in the Simpson and Shannon-Wiener index, and Pielou's evenness index (E) showed consistency in the soil seed bank.
中文关键词	河西走廊 ; 人工植被 ; 土壤种子库 ; 萌发
英文关键词	Hexi Corridor artificial vegetation seed bank germination
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6587069
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316040
作者单位	张掖市林业科学研究院, 张掖, 甘肃 734000, 中国
推荐引用方式 GB/T 7714	鲁延芳,马力,占玉芳,等. 河西走廊中部沙漠人工植被中土壤种子库特征[J],2019,36(9):2334-2341.
APA	鲁延芳,马力,占玉芳,甄伟玲,滕玉风,&钱万建.(2019).河西走廊中部沙漠人工植被中土壤种子库特征.草业科学,36(9),2334-2341.
MLA	鲁延芳,et al."河西走廊中部沙漠人工植被中土壤种子库特征".草业科学 36.9(2019):2334-2341.