Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Chine → 2019 → Relationship between Population Characteristics of Artemisia Scopariain and Soil Factors in Desert Steppe

Ningxia university (2019)

Relationship between Population Characteristics of Artemisia Scopariain and Soil Factors in Desert Steppe

李月飞;

Titre : Relationship between Population Characteristics of Artemisia Scopariain and Soil Factors in Desert Steppe

Auteur : 李月飞;

Grade : Master’s Theses 2019

Université : Ningxia university

Résumé partiel
Ningxia desert grassland is mainly distributed in arid and semi-arid climate area,accounting for about 55%of the total grassland area,which is an important barrier to the ecological environment of Ningxia.In recent years,with the implementation of policies such as returning farmland to forestry and grassland,closing off grazing and ecological migration,the regional ecosystem will recover itself after eliminating the disturbance of human and livestock,and the vegetation coverage has been significantly improved.However,in the early stage of the restoration of deserts and grasslands,there is a lack of scientific management and a lack of understanding of the structure and function of grassland ecosystems,such as Artemisia scopariain which is a non high quality forage,occupies as many as 1/4 of grassland in the middle part of Ningxia’s Yanchi desert,making the vegetation structure and quality of desert steppe poor.Therefore,based on the method of point location in different zero models(complete spatial random model,Poisson cluster model and nested double-cluster model),this study has a preliminary understanding of the distribution pattern of the initial life history of A.scoparia populations in desert grassland,calcareous soil,aeolian sandy soil and weathering bedrock.On the basis of this method,37 typical plots of A.scoparia communities were selected by random sampling method in the central desert steppe of Ningxia.The growth characteristics and soil factors data of A.scoparia were obtained through field investigation and laboratory tests.Soil factors and distribution indices of A.scoparia were studied by one-way ANOVA.Statistical analysis,and analysis of the relationship between soil physical and chemical factors.

Mots clés : population distribution pattern; zero model; quantitative characteristics of population; soil factors

[ Présentation (CNKI) - > http://oversea.cnki.net/kcms/detail... ]

Page publiée le 25 mai 2020