干旱区生态环境知识资源中心(Arid): 春夏季放牧对古尔班通古特沙漠南部土壤种子库和地上植被的影响

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	春夏季放牧对古尔班通古特沙漠南部土壤种子库和地上植被的影响
其他题名	Effect of Grazing in Spring-Summer on Soil Seed Bank and Vegetation in Southern Part of Gurbantunggut Desert
	吴涛 1; 王雪芹 1; 盖世广 1; 郭洪旭 1; 陈明 2; 王琪 2; 全永威 2; 金兴强 2
ISSN	1000-694X
出版年	2009
卷号	29 期号:3 页码:499-507
中文摘要	位于新疆北部准噶尔盆地腹地的古尔班通古特沙漠,是世界上温带荒漠生物多样性的精华和最为丰富的典型区域.历史上这里就是北疆羊和部分马匹重要的冬牧场,但近年来的放牧活动在春夏季也开始进入沙漠腹地,使地表性质与植被覆盖发生了明显改变.应用野外随机取样与室内萌发实验相结合的方法,对比研究了古尔班通古特沙漠南部春夏季放牧和冬季放牧沙垄土壤种子库差异及其与地上植被的关系.结果表明:冬季放牧沙垄种子库种数为24种,而春夏季放牧沙垄有20种,后者明显减少了植物种数.冬季放牧沙垄种子库密度为(353.287)粒·m~(-2),而春夏季放牧沙垄为(189.123)粒·m~(-2),比前者减少了88%.两类沙垄土壤种子库的生活型组成都以一年生植物为主,相似性系数为0.711.相同沙垄不同部位的物种相似性系数在0.429～0.600之间,异质性较大,尤其表现在除垄顶之外的其他部位.冬季放牧沙垄和春夏季放牧沙垄地上植被中分别有植物36种和26种,各生活型所有物种均为后者低于前者,其中短命、类短命物种数量减少幅度最大.春夏季放牧沙垄地上植被的物种多样性和均匀度降低,而优势度升高.回归分析显示,冬季放牧沙垄定植群落有21%的变异来源于土壤种子库,而春夏季放牧沙垄有51%的变异来源于土壤种子库,可见不同季节的放牧干扰显著影响土壤种子库及其与地上植被的相关关系.
英文摘要	Gurbantunggut desert is the largest fixed and semi-fixed desert in China, and its vegetation species is relatively multiple. The semi-fixed longitudinal dune area in the desert was winter pasture in history, but recently grazing entered the desert even in spring and summer. Therefore, it changes the density and composition of soil seed bank and vegetation. The comparing results show that there are 24 seed banks under winter grazing and 20 seed banks under spring-summer grazing, and their corresponding seed bank density is (355.188) viable seeds·m~(-2) and (189. 1 23) viable seeds·m~(-2), respectively. The annual herbages dominate in both grazing sites, with the similarity coefficient of soil seed bank being 0. 711. The similarity coefficients of soil seed bank vary in a range of 0. 429～0. 600 at different parts of a same sand dune. The plant species in winter grazing dune and spring-summer grazing dune are 36 and 26 species respectively. The species number of every life form in spring-summer grazing dune is less than that in winter grazing dune. There are lower biodiversity index and evenness index in spring-summer grazing dune, but with a higher dominance index. Regression analysis shows that difference in seed bank density accounts for 21 % of the variance of standing vegetation density in winter grazing dune and for 51% of that in spring-summer grazing dune. It indicates that the density of seed bank and standing vegetation in winter grazing dune has weak correlation, and grazing during spring and summer would enhance the relationship between them remarkably.
中文关键词	古尔班通古特沙漠 ; 半固定沙垄 ; 放牧影响 ; 土壤种子库 ; 地上植被
英文关键词	Gurbantunggut Desert semi-fixed longitudinal dune effect of grazing soil seed bank 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:3635473
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224553
作者单位	1.国家荒漠-绿洲生态建设工程技术研究中心, 国家荒漠-绿洲生态建设工程技术研究中心, 乌鲁木齐, 新疆 830011, 中国; 2.新疆额尔齐斯河流域开发工程建设管理局, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	吴涛,王雪芹,盖世广,等. 春夏季放牧对古尔班通古特沙漠南部土壤种子库和地上植被的影响[J],2009,29(3):499-507.
APA	吴涛.,王雪芹.,盖世广.,郭洪旭.,陈明.,...&金兴强.(2009).春夏季放牧对古尔班通古特沙漠南部土壤种子库和地上植被的影响.,29(3),499-507.
MLA	吴涛,et al."春夏季放牧对古尔班通古特沙漠南部土壤种子库和地上植被的影响".29.3(2009):499-507.