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

Accueil du site → Master → Chine → 2006 → A Study on Several Kinds of Xylophyte’s Drought Resistant in Arid Valley of MinJiang River

Sichuan Agricultural University (2006)

A Study on Several Kinds of Xylophyte’s Drought Resistant in Arid Valley of MinJiang River

Li Yan Qiong

Titre : A Study on Several Kinds of Xylophyte’s Drought Resistant in Arid Valley of MinJiang River

Auteur : Li Yan Qiong

Grade : Master’s Theses 2006

Université : Sichuan Agricultural University

Résumé
Drought-resistant physiological characteristics of Several kinds of xylophyte which distributed in Za Gu-nao valley of MinJiang River had been measured. The test — xylophyte were 5 kinds of arbors with higher survival rate and keeping rate— Cupressus chengiana , Pinus radiata, Ailanthus altissima , Robinia pseudoacacia , Ulmus pumila L. and 4 native shrub species—Sophora davidiana , Convolvulus tragacanthoides, Bauhinia faberi var. microphylla , Artemisia gmelinii .With studying the physiological indexes of drought resistant and its dynamic change in the growth season of all test-trees, it showed not only the dynamic change but also showed the difference of tree species’ drought resistance. With analysed drought resistant and its dynamic change in the growth season of tree species , it determined the main physiological target which influenced the drought resistant, then grasped the characteristic of drought resistant of tree species in this area, provided the theory basis for the tree species’s chosen between the vegetation resumed and rebuilt in this area .Test result as follow:1. It found that the content of Chl, free Pro , soluble sugars increased and evaporation ratio , WSD , RWC and cytolemma osmosis decreased under the drought stress.2. There were some different change trend in each physiological drought resistant indexes between forestation tree and shrub which growed on different slope. Tree species showed different order on each index. Therefore it was difficult to estimate the dynamic change of drought resistant and choose the best one by using single standard. By reason of forest tree’s complex drought resistant mechanism, it was difficult to give the estimation accurately either. So by using the approach of comprehensive estimation, it was more objective and definite.3.It measured that the drought resistant of test-trees which growed both on shady

Mots clés : drought resistant physiological dynamic change comprehensive estimation Principa-Components Analysis

Présentation (Dissertationtopic )

Page publiée le 30 avril 2013, mise à jour le 20 octobre 2017