The Research On Drought-resistance Of Twelve Species Of Gardening Trees And Comprehensive Evaluation

Select twelve species of Gardening Trees as research object, Including Prunus serrulata、Machilus thunbergii、Lindera communis、Phoebe bournei、Lindera megaphylla、Fraxinus griffithi、Zelkova schneideriana、Sloanea hemsleyana、 Aceraceae fabri、Cyclobalnopsis glauca、Melliodendron xylocarpum and Parakmeria lotungensis. By using the method of grey correlation analysis and the method of fuzzy analysis method, the comprehensive index of drought resistance of 12 tree species in arid environment of were determined. The main conclusions are as follows:(1) In the same drought conditions, leaf tissues of 12 species of garden trees water and water saturation deficit show the corresponding trend:Aceraceae fabri>Zelkova Schneider iana>Cyclobalnopsis glauca> Sloanea hemsleyana> Prunus serrulata Lindl.> Lindera megaphylla> Fraxinus griffithii>Parakmeria lotungensis> Machilus thunbergii>Lindera communis>Melliodendron xylocarpum> Phoebe bournei.(2) In the same drought conditions,12 garden tree species on chlorophyll content show the corresponding trend:Lindera megaphylla> Cyclobalnopsis glauca> Sloanea hemsleyana> Melliodendron xylocarpum> Parakmeria lotungensis> Zelkova schneideriana>Prunus serrulata>Lindera communis>Fraxinus griffithii >Phoebe bournei>Machilus thunbergii>Aceraceae fabri.(3) In the same drought conditions, The proline content of 12 garden tree species shows the corresponding trend:Lindera communis> Fraxinus griffithii> Melliodendron xylocarpum> Lindera megaphylla>Cyclobalnopsis glauca>Zelkova Schneideriana>Sloanea hemsleyana>Parakmeria lotungensis>Machilus thunbergii >Phoebe bournei>Aceraceae fabri>Prunus serrulata.(4) In the same drought conditions, The MDA content of 12 garden tree species shows the corresponding trend:Parakmeria lotungensis>Prunus serrulata>Lindera communis> Phoebe bournei> Fraxinus griffithii> Lindera megaphylla> Cyclobalnopsis glauca> Aceraceae fabri> Zelkova schneideriana> Machilus thunbergii>Melliodendron xylocarpum>Sloanea hemsleyana.(5)The corresponding correlation index of each index weight by correlation analysis is:relative water content 0.208,water saturation deficit 0.203, free proline content 0.201, the MDA content 0.189,.Selected the four drought physiological indexes on behalf of the garden trees and drought assessment requirements.(6)By the principal components and the membership function analysis method, results show that the drought resistance of twelve kinds of garden plants from the strongest to the weakest as follows:Melliodendron xylocarpum>Lindera communis>Lindera megaphylla>Fraxinus griffithii>Cyclobalnopsis glauca>Zelkova schneideriana>Sloanea hemsleyana> Parakmeria lotungensis>Machilus thunbergii>Phoebe bournei>Aceraceae fabri> Prunus serulata.