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Université de Mongolie-Intérieure (2019)

Physio-eco-adaptability of Three Extreme Strong Xerophyte Species in Western Ordos Appled in Coal Mining Area Bioremediation

孙安安;

Titre : Physio-eco-adaptability of Three Extreme Strong Xerophyte Species in Western Ordos Appled in Coal Mining Area Bioremediation

Auteur : 孙安安;

Grade : Master’s Theses 2019

Université : Université de Mongolie-Intérieure

Résumé partiel
Ecological cumulative effect and vegetation restoration in the process of ecological reconstruction after long-term high-intensity mining in large coal power generation base have become focuses of academic circles at both China and abroad. Threee xeremestrongxerophytespeciesT etraenamongolica, Ammopiptanthus mongolicus and Zarcozygium xanthoxylon distributed in East Alashan-West Ordos,which were appled at the first time in Shendong Shangwan mining area of China Energy Group to bioremediate the sporeled land after intense artificial disturbance.The photosynthetic physiological and ecological adaptability of three exereme strong xerophyte species in mining area management was measured by LI-6800 photosynthetic system tester manufactured.Additionally,the plant bio-enzymes(SOD,POD and CAT)and the agrochemical characteristics of plant rhizosphere soil were analyzed.The results as below that :(1)The net photosynthetic rate(Pn),transpiration rate(Tr)and stomatal conductance(Gs)of the three plants in Shendong mining area were higher than those in Wuhai area.The intercellular CO2 concentration(Ci)in Shendong mining area is lower than that of Wuhai area.Water use efficiency(WUE)of Tetraena mongolica and Zarcozygium xanthoxylon in spring and WUE of the three plants were higher in Wuhai area than that of Shendong mine while it is higher in Shendong mining area in rest months.(2)In the same growth period,the net photosynthetic rate(Pn)of the three plants varied in different periods.Pn of the three plants in Wuhai area in spring showed as follows:Zarcozygiumxanthoxylon>Tetraenamongolica>Ammopiptanthus mongolicus and Ammopiptanthus mongolicus>Zarcozygium xanthoxylon>Tetraena mongolica in summer and autumn.At the same time it shows that the level of Pn as Ammopiptanthus mongolicus≥Zarcozygium xanthoxylon>Tetraena mongolica in Shendong mining area.(3)In different growth periods,there was no significant difference in Pn of Tetraena mongolica and Zarcozygium xanthoxylon between different seasons in Wuhai area ;the Pn of Ammopiptanthus mongolicus in spring and autumn was significantly different,but there was no significant difference between summer and other seasons.However,Pn of Tetraena mongolica and Ammopiptanthus mongolicus shows significant difference in spring and summer,the Pn in autumn was no significantly different from that in spring and summer ;Pn of Zarcozygium xanthoxylon shows significant difference in spring and autumn,the Pn in summer was no significantly different from that in spring and autumn in Shendong mining area.(4)In the original habitat of Wuhai area water use efficiency(WUE)is the main limitingfactoraffectingTetraenamongolica’sphotosyntheticefficiency.Transpiration rate(Tr)has the greatest influence on photosynthetic efficiency of Ammopiptanthus mongolicus,while atmospheric temperature(Ta)is the main limiting factor for photosynthetic efficiency of Zarcozygium xanthoxylon.In Shendong mining area,Ta and WUE are the main ecological factors affecting photosynthesis of Tetraena mongolica

Mots clés : Strong extreme xerophyte; Photosynthetic efficiency; Bioremediation in mining areas; Physiological and ecological adaptability; Eastern Alxa-Western Ordos;

Présentation (CNKI)

Page publiée le 20 mai 2020