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Inner Mongolia Agricultural University (内蒙古农业大学) 2021

Distribution of Soil Water and Salt in Shelterbelt System and Its Effect on Plant Communityin Desert Salt Lake Region

冯亚亚

Titre : Distribution of Soil Water and Salt in Shelterbelt System and Its Effect on Plant Communityin Desert Salt Lake Region

Auteur : 冯亚亚

Grade : Master 2021

Université : Inner Mongolia Agricultural University (内蒙古农业大学)

Résumé partiel
As an important environmental factor affecting the stability of windbreak and sand fixation forest in arid area,the distribution pattern of soil water and salt restricts the formation,succession and distribution of species.Taking Jilantai Salt Lake shelter forest system as the research object,this thesis investigated the soil water and salt content and typical plant community characteristics in the area by using the methods of field sampling and indoor analysis,analyzed the distribution law of soil water and salt content under different soil layers,and revealed the main water and salt factors affecting the plant community characteristics of the shelter forest system,so as to provide reference for the tending of Jilantai Salt Lake shelter forest system It provides a theoretical basis for management.(1)There are 17 species in 17 genera of 8 families in the study area,including 5 species of Chenopodiaceae,4 species of Leguminosae,2 species of Gramineae and Tamaricaceae,and 1 species of Compositae,nitrariaceae and Elaeagnaceae.On the whole,the plant species composition of shelterbelt system is relatively poor.The average density and coverage of shrub plants in different site types of shelterbelt system decreased gradually from beach to mobile sand ridge,while the average height change was opposite to the height.The results showed that the average density of herbaceous plants varied from large to small in shelterbelt,windbreak and sand blocking belt,semi fixed sand ridge and beach,and the variation of average height was similar to that of average density ;The diversity index of herbaceous and shrub plants was the highest in shelterbelt,the lowest in beach,and the lowest in moving sand ridge.The results show that the artificial vegetation configuration has a certain influence on the characteristics of shelterbelt vegetation community.

Mots clés : Shelterbelt system ;Soil water and salt factors ;Distribution pattern ;Plant community characteristics ;Dominant facto ;

Présentation (CNKI)

Page publiée le 21 mars 2022


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