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阿拉善干旱荒漠区不同植被类型土壤种子库研究
引用本文:曾彦军,王彦荣,南志标,卫东,陈善科,李保尔.阿拉善干旱荒漠区不同植被类型土壤种子库研究[J].应用生态学报,2003,14(9):1457-1463.
作者姓名:曾彦军  王彦荣  南志标  卫东  陈善科  李保尔
作者单位:1. 兰州大学草地农业科技学院,甘肃草原生态研究所,兰州,730020
2. 内蒙古阿拉善盟草原站,巴彦浩特,750360
基金项目:国家重点基础研究发展规划项目(G2000048704),国家自然科学基金重点资助项目(39730100)
摘    要:1]兰州大学草地农业科技学院,兰州730020 2]甘肃草原生态研究所,兰州730020 3]内蒙古阿拉善盟草原站,巴彦浩特750360

关 键 词:种子库  干旱荒漠  生活型  物种多样性  相似性
文章编号:1001-9332(2003)09-1457-07
修稿时间:2002年6月26日

Soil seed banks of different grassland types of Alashan arid desert region,Inner Mongolia
ZENG Yanjun,WANG Yanrong,NAN Zhibiao,WEI Dong,CHEN Shanke and LI Baoer.Soil seed banks of different grassland types of Alashan arid desert region,Inner Mongolia[J].Chinese Journal of Applied Ecology,2003,14(9):1457-1463.
Authors:ZENG Yanjun  WANG Yanrong  NAN Zhibiao  WEI Dong  CHEN Shanke and LI Baoer
Institution:Gansu Grassland Ecological Research Institute, College of Pastoral Agricultural Science and Technology, Lanzhou University, Lanzhou 730020, China. zengyanjun2002@163.com
Abstract:Investigations on the soil seed banks of different grassland types of Alashan arid desert region in Inner Mongolia showed that when the altitudes of sampling plots increased from 1 370 m to 1 750 m, the soil seed densities of natural grasslands decreased from 326 grain.m 2-2 to 76 grain.m-2. At the altitude of 1 100 m, the soil seed density was 56 grain.m-2 in typical desert plot, but only 8 grain.m-2 in the sand dune plot. After the vegetation was restored with Artemisa sphaerocephala on sand dune, its soil seed density increased obviously, almost as 17 -29 times as sand dune's. In this study, 31 seeds m-2 were sampled, which belonged to 11 families. A-mong them, annual plants accounted for 77%, 100% and 70%, perennial plants accounted for 21%, 0 and 16%, and semi-shrubs accounted for 2%, 0 and 14%, respectively for natural grassland, sand dune and sown grassland. Shrub seeds were not found in all the soil seed bank plots. When the altitudes of sampling plots increased from 1 100 m to 1 750 m, the species richness (Margalet index) of soil seed banks of natural grasslands increased from 1. 49 to 2. 77, and the species diversity (Shannon-Winner index) increased from 0. 697 to 0.917.
Keywords:Seed bank  Arid desert  Life form  Species diversity  Similarity  
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