干旱区生态环境知识资源中心(Arid): 川西北不同程度沙化草地植被和土壤特征研究

Arid

	川西北不同程度沙化草地植被和土壤特征研究
其他题名	Study on Vegetation and Soil Characteristics of Desertification Grassland in Northwest Sichuan
	万婷; 涂卫国; 席欢; 李裕冬; 唐学芳; 杨一川
来源期刊	草地学报
ISSN	1007-0435
出版年	2013
卷号	21 期号:4 页码:650-657
中文摘要	以川西北不同程度沙化草地为研究对象,通过科学调查、采样和公式计算,对植被群落、生物量、土壤含水量、容重和孔隙度等特征因子进行分析,以揭示川西北地区由湿地到严重沙化草地演替的不同阶段植被和土壤特征的变化情况。结果表明:随着草地沙化程度加剧,群落呈现出"湿生-中生-旱生"的演替过渡格局,群落高度和盖度降低,物种丰富度下降幅度达88%,优势物种构成也发生较大变化;生物多样性指数在轻度沙化草地群落中最高,总生物量下降幅度达90.4%,群落地下生物量远大于地上生物量;沙化过程中,土壤中含水量和持水量下降、容重增大、孔隙度减小。沙化初期土壤特征变化明显,应针对这一现象在沙化初期开展恢复治理工作。
英文摘要	Desertification grasslands with different degree were taken as the research object.The characteristic factors of vegetation community,biomass,soil water content,volume weight,porosity were analyzed through scientific investigation,sampling and formulas to reveal the change of vegetation and soil characteristics with different desertification grasslands in Northwest Sichuan.Results showed that community succession presented the pattern ofhygrophyte-mesophyte-xerophytewith the aggravation of desertification degree.The height and coverage of community decreased,species richness declined 88%and dominant species changed greatly.The diversity index of light-desertification grassland was the highest one among tested grasslands.Total biomass decreased 90.4%,and the underground biomass decreased far more than aboveground biomass.In desertification progress,both soil water content and capacity decreased, the volume weight showed uptrend and porosity showed downtrend,soil characteristics had large variation in the early stage of desertification.Aiming at this phenomenon,the recovery and treatment of desertification grassland should be carried out in the early stage.
中文关键词	草地 ; 沙化 ; 植被 ; 生物量 ; 土壤
英文关键词	Grassland Desertification Vegetation Biomass Soil
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4915271
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229248
作者单位	四川省自然资源科学研究院, 成都, 四川 610041, 中国
推荐引用方式 GB/T 7714	万婷,涂卫国,席欢,等. 川西北不同程度沙化草地植被和土壤特征研究[J],2013,21(4):650-657.
APA	万婷,涂卫国,席欢,李裕冬,唐学芳,&杨一川.(2013).川西北不同程度沙化草地植被和土壤特征研究.草地学报,21(4),650-657.
MLA	万婷,et al."川西北不同程度沙化草地植被和土壤特征研究".草地学报 21.4(2013):650-657.