Font Size: a A A

Study On Woody Flora And Resource Utilization In Alxa

Posted on:2017-03-20Degree:MasterType:Thesis
Country:ChinaCandidate:Y G WeiFull Text:PDF
GTID:2180330488974717Subject:Soil and Water Conservation and Desertification Control
Abstract/Summary:PDF Full Text Request
Alxa is located in the eastern part of desert of China and lies at the confluence of The Mongolian Plateau, The Ningxia plain, The Tibetan Plateau and The Loess Plateau,also,it lies in the transitional zone of Desert Area in China and Inner Mongolia Plateau.This paper studies and analysises Alxa woody flora and its resources on based of the geobotany principle disciplines,the conclusions are as follows:there are 44 families of woody plants in Alxa, which belong to 95 genera and 244 species (excluding cultivated plants).Among them there are 3 families,7genera,17species in gymnosperms;41families,88genera,227 species in angiosperm; 40 families,87 genera,226 species in dicotyledonous plants and I family, I genus,1 specy in Monocotyledon. According to the investigation and study from families, genera and species of woody plants in this area, there are 8 dominant families and 12 dominant genera,and they mark superior phenomenon; the temperate components are dominant in geographical distribution types. Xerophyte and mesophyte are in the proportion of flat in moisture ecotypes in this area,and xerophytes are the elementary elements of the structure of desert vegetation (means that the area with poor living conditions)while the mesophyte are mainly distributed in the hidden domain environment; From life forms,shrubs are absolutely dominant.Though there are relatively high degree of 4 endemic genera and 4 endemic species of woody plants,there will be obvious frangibility once they suffer from damage,and it is difficult to restore because of the harsh natural environment in Alxa.According to the use of wild plants,the woody plants in Alxa are typed 51 species for edible plant resources,57 for industrial plant resources,97 for medicinal resources,233 for protecting and transforming the environment and 150 for germplasm resource.Among the woody plants, there are a total of 34 species of rare and endangered woody plants,meanwhilc nine species are listed as national key protected species,among which there are 9 national second-grade protection species and 5 national third-grade protection species.
Keywords/Search Tags:Alxa, Woody plant flora, Geographical elements, Plant resources
PDF Full Text Request
Related items