干旱区生态环境知识资源中心(Arid): 不同沙丘类型下黄河分洪区土壤种子库月份动态研究

Arid

	不同沙丘类型下黄河分洪区土壤种子库月份动态研究
其他题名	Monthly Dynamic Variation of Soil Seed Bank in Different Dune Types of the Yellow River Diversion Area
	辛智鸣 1; 董雪 2; 刘明虎 2; 李新乐 1; 段瑞兵 1; 郝玉光 1; 陆占东 3
来源期刊	中国农业科技导报
ISSN	1008-0864
出版年	2019
卷号	21 期号:11 页码:138-148
中文摘要	采用种子萌发法,研究了乌兰布和沙漠东北缘固定-半固定-流动沙丘3种类型下黄河分洪区土壤种子库的4月份(春季)、7月份(夏季)和10月份(秋季)动态变化,同时分析水淹区段、未淹区段以及对照区段地表植被与土壤种子库之间的关系。结果表明:水淹区段土壤种子库密度随月份逐渐降低,即4月份(201粒/ m~2)>7月份(176粒/ m~2)>10月份(170粒/ m~2);未淹区段土壤种子库密度4月份(1 063粒/ m~2 )>10月份(1 036粒/ m~2)>7月份(733粒/ m~2),其各月均大于对照区段且月份变化规律相同。不同沙丘类型的土壤种子库密度为固定沙丘>半固定沙丘>流动沙丘,且月份变化明显,即4月份(1 002粒/ m~2 ) >10月份(903粒/ m~2)>7月份(609粒/ m~2)。黄河分洪区土壤种子库物种共有23种,隶属于8科23属,藜科和禾本科为主,共占65%。从生活型来看,各月份均以一年生草本为主;从物种组成上来看,7月份土壤种子库物种数显著小于4月份和10月份。未淹区段由于干湿交替形成微环境,更有利于外来物种进入,土壤种子库物种更加丰富。消落带内土壤种子库物种数多于地表植物的物种数,但对照区段相对减小。水淹区段、未淹区段和对照区段土壤种子库和地表植被间Jaccard相似性系数分别为0.357、0.333和0.289,整体相似系数偏低。
英文摘要	Taking seed germination test, this paper studied the seasonal dynamic variation of soil seed banks at April (spring), July(summer), October(autumn) in 3 different sand dunes (fixed dune, semi-fixed dune, mobile dune) of the Yellow River diversion area; and analyzed the water-level-fluctuating zone (including the flooded, non-flooded and control areas) and the relationship between standing vegetation and soil seed bank. The results showed that: at flooded area, the density of soil seed bank declined gradually with time flowing i.e. April (201 seeds/ m~2)>July (176 seeds/ m~2)>October (170 seeds/ m~2). At non-flooded area, the density of soil seed bank was in the following order: April (1 063 seeds/ m~2 )>October (1 036 seeds/ m~2 )>July (733 seeds/ m~2 ). The figure of each month was bigger than that of the control area, and the same monthly variation rule was. The soil seed bank density was fixed dune> semi fixed dune > moving dune with distinguish monthly variation i. e. April (1 002 seeds/ m~2 ) > October (903 seeds/ m~2)>July (609 seeds/ m~2). There were 23 species belonging to 8 families and 23 genera in soil seed banks of the Yellow River diversion area. Most of them belonged to Chenopodiaceae and Poaceae, accounting for 65%. Judging from the lifestyle, each month took annual herbage species as principal. In terms of species composition, the number of soil seed banks in July was obviously smaller than that of April and October. At the non - flooded area, a microecological environment was formed by alternating wetness and dryness. It was more favorable for foreign species to enter. Thus, the species in soil seed bank were more abundant. Species in soil seed bank at hydro-fluctuation belt was more than that in the standing vegetation. However the control section was relatively small. Their Jaccard similarity coefficients of species composition between the seed bank and standing vegetation were respectively 0.357, 0.333 and 0.289 in flooded area, non-flooded area and the control area. The results indicated that the similarity coefficients were flat.
中文关键词	黄河分洪区 ; 季节动态 ; 土壤种子库 ; 水淹干扰
英文关键词	Yellow River diversion area seasonal dynamics soil seed bank flooding disturbance
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6609230
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315880
作者单位	1.中国林业科学研究院沙漠林业实验中心;;内蒙古磴口荒漠生态系统国家定位监测研究站, ;;内蒙古磴口荒漠生态系统国家定位监测研究站, 磴口;;磴口, 内蒙古;;内蒙古 015200;;015200, 中国; 2.中国林业科学研究院沙漠林业实验中心, 磴口, 内蒙古 015200, 中国; 3.磴口县气象局, 磴口, 内蒙古 015200, 中国
推荐引用方式 GB/T 7714	辛智鸣,董雪,刘明虎,等. 不同沙丘类型下黄河分洪区土壤种子库月份动态研究[J],2019,21(11):138-148.
APA	辛智鸣.,董雪.,刘明虎.,李新乐.,段瑞兵.,...&陆占东.(2019).不同沙丘类型下黄河分洪区土壤种子库月份动态研究.中国农业科技导报,21(11),138-148.
MLA	辛智鸣,et al."不同沙丘类型下黄河分洪区土壤种子库月份动态研究".中国农业科技导报 21.11(2019):138-148.