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

Accueil du site → Master → Chine → 2021 → Ecological Restoration Dynamics of Robinia Pseudoacacia Population in an Open Pit Mine in Semi-arid Area

Shanxi University (2021)

Ecological Restoration Dynamics of Robinia Pseudoacacia Population in an Open Pit Mine in Semi-arid Area

康洪志

Titre : Ecological Restoration Dynamics of Robinia Pseudoacacia Population in an Open Pit Mine in Semi-arid Area

Auteur : 康洪志

Grade : Master 2021

Université : Shanxi University

Résumé partiel
Vegetation restoration is an important method for mining area restoration.Studying the dynamic characteristics of plant population restoration is of great importance to reveal the succession law and the co-existence and maintenance mechanism of species in the process of vegetation restoration in semi-arid area,it is also of great significance to further optimize the allocation model of vegetation ecological restoration.In this study,Robinia pseudoacacia population structure and the ecological niche and spatial distribution dynamics of community associated species were studied by continuous monitoring of fixed quadrats in the ecological restoration area of the south dump of Antai Bao open-pit coal mine in semi-arid area.The main research conclusions are as follows :(1)There was a negative relationship correlation between planting density and survival rate of Robinia pseudoacacia population in the early stage.The survival rate was S1>S3>S4>S2,before recovery 22 years ago,and S3>S1>S4>S2 after 27 years of recovery.In S1 and S3 of Robinia pseudoacacia × Pinus tabulaeformis combination,the overall tree height and DBH of combination of Robinia pseudoacacia were the largest,and the growth of Robinia pseudoacacia first entered the slow stage after 22 years of recovery.The growth of Robinia pseudoacacia in pure S4 and S2 of Robinia pseudoacacia × Ulmus pumila × Ailanthus stinkella was poor and all of them were in the growth stage.With the increasement of recovery years,the proportion of individuals in middle diameter class and middle height class was the largest in all plots.The overall DBH and height structure all shifted to higher diameter class and height class.The proportion of individuals in large diameter class and height class showed S1 and S3>S2>S4.The overall age structure of Robinia pseudoacacia was in an increasing state.The growth potential of Robinia pseudoacacia population age structure in S1,S2 and S3 plots is great,and the future population structure tends to be reasonable.The number of young Robinia pseudoacacia in S4 sample plot decreased gradually,which made it difficult to renew and maintain Robinia pseudoacacia population,and it may be a declining population in the future.In general,Robinia pseudoacacia grew well and the population survival was better in Robinia pseudoacacia × Pinus tabulaeformis mixed forest,while Robinia pseudoacacia broad-leaved pure forest had the worst performance

Mots clés : Open-pit mine ;Ecological restoration ;Robinia pseudoacacia species ;Population dynamics ;

Présentation (CNKI)

Page publiée le 25 novembre 2021