干旱区生态环境知识资源中心(Arid): 草地沙漠化过程中土壤与地上植被的变化及其相互关系

Arid

	草地沙漠化过程中土壤与地上植被的变化及其相互关系
其他题名	Relationship between the Soil and Standing Vegetation Changes during Grassland Desertification Process
	熊炳桥 1; 赵丽娅 2; 张劲 1; 李艳蔷 1; 陈红兵 1; 李锋瑞 3
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2017
卷号	26 期号:3 页码:400-407
中文摘要	以科尔沁沙地4种不同退化程度沙地群落为研究对象,采用野外植物样方调查与室内土壤理化分析相结合的方法,系统分析了固定沙地(潜在沙漠化阶段)、半固定沙地(轻度沙漠化阶段)、半流动沙地(中度沙漠化阶段)和流动沙地(严重沙漠化阶段)4个群落的植被、土壤特征的变化以及土壤与植被之间的相互关系,为退化沙质草地群落地恢复与重建提供科学依据。结果表明,(1)草地沙漠化过程中,群落物种组成发生显著变化,物种数不断减少,从20下降到11。不同群落盖度(F=42.569,n=120,P<0.001)、密度(F=38.817,n=120,P<0.001)和地上生物量(F=29.017,n=120,P<0.001)均存在显著差异,且下降趋势明显,下降幅度分别为82%、78%和85%。(2)草地沙漠化过程中,草本植物占据绝对优势,但其比例明显下降,多年生草本植物和灌木的物种数总体呈下降趋势。藜科植物具有广适性,数量相对稳定,重要值呈现上升趋势;禾本科和豆科植物种类和重要值都呈大幅下降趋势。菊科植物相对较少,从半固定沙地到流动沙地,差巴嘎蒿(Artemisia halodendron)在群落中占有重要地位。(3)草地沙漠化过程中,Shannon-Wiener指数、Simpson指数、均匀度指数和Margalef指数均呈下降态势。(4)草地沙漠化过程中,土壤机械组成从固定沙地到流动沙地,粗砂含量增加,细砂粒、黏粉粒含量呈下降态势,土壤水分也不断减少。土壤养分全磷、全氮、速效磷、速效氮和有机质的含量随着沙漠化程度的加剧,表现出不同程度的降低,且差异显著(P<0.05)。(5)草地沙漠化过程中,土壤与植被间呈现出显著的相关性(P<0.05),说明土壤与植被紧密联系在一起,沙漠化过程实质就是土壤与植被协同退化的结果。
英文摘要	To better recover and reestablish the degraded sandy communities, relationship between the soil and plant communities were studied on 4 different degraded sandy communities that are fixed sand land (potential desertification stage), semi-fixed sand land (light desertification stage), semi-shifting sand land (medium desertification stage) and shifting sand land (heavy desertification stage) in Horqin sandy land. The results shown that during grassland desertification process: (1) The species quantity declined significantly from 20 to 11 Moreover, there was a significant difference among the aboveground biomass s (F=29.107, n=360, P<0.001), the coverage (F=42.569, n=120, P<0.001) and the density (F=38.817, n=120, P<0.001), meanwhile, the ground biomass and coverage reduced gradually, the decrease rage were 82%, 78% and 85% respectively. (2) Herbaceous plants are the domain species, while its ratio was obviously decreased. Moreover, the species quantity of perennial herbs and shrubs were declined. Chenopodiaceae had a wide adaptability which kept at relatively stable level and its important value was increased gradually. Gramineae and Legume were experienced a sharp decrease, meanwhile, there was a relatively small number of Compositae which were migrate from semi-fixed to shifting sand land. (3) Shannon-Wiener index, Simpson index, evenness index and Margalef index suggested a decreasing trend. (4) The physical and chemical properties of the soil also degraded. Moreover, there were a significant reduction of total phosphorus, total nitrogen, available phosphorus, available nitrogen and organic matter content (P<0.05) along with the intensification of desertification. And (5) there was a significant correlation between the soil and vegetation (P<0.05) which indicates that the desertification process is the result of the synergetic degradation of soil and vegetation.
中文关键词	沙漠化 ; 群落特征 ; 土壤机械组成 ; 土壤养分 ; 相互关系
英文关键词	desertification community characteristics soil mechanical composition soil nutrient relationship
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5996884
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236400
作者单位	1.湖北大学资源环境学院, 武汉, 湖北 430062, 中国; 2.湖北大学资源环境学院, 区域开发与环境响应湖北省重点实验室, 武汉, 湖北 430062, 中国; 3.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	熊炳桥,赵丽娅,张劲,等. 草地沙漠化过程中土壤与地上植被的变化及其相互关系[J]. 中国科学院西北生态环境资源研究院,2017,26(3):400-407.
APA	熊炳桥,赵丽娅,张劲,李艳蔷,陈红兵,&李锋瑞.(2017).草地沙漠化过程中土壤与地上植被的变化及其相互关系.生态环境学报,26(3),400-407.
MLA	熊炳桥,et al."草地沙漠化过程中土壤与地上植被的变化及其相互关系".生态环境学报 26.3(2017):400-407.