Aesthetic growth of a native tree species with desirable characteristics for urban green areas in arid and semiarid environments

《Aesthetic growth of a native tree species with desirable characteristics for urban green areas in arid and semiarid environments》

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来源: URBAN FORESTRY & URBAN GREENING,Vol.33,P.12-15

语言: 英文

关键字: Semiarid environments; Bursera fagaroides; PAR extinction; Propagation protocols; Urban green areas; PHOTOSYNTHETICALLY ACTIVE RADIATION; ARCHITECTURE; ORIENTATION

作者单位: [Carrillo-Angeles, Israel G.; Queijeiro-Bolanos, Monica E.; Malda-Barrera, Guadalupe X.; Suzan-Azpiri, Humberto] Univ Autonoma Queretaro, Fac Ciencias Nat, Av Ciencias S-N, Juriquilla 76230, Queretaro, Mexico. Queijeiro-Bolanos, ME (reprint author), Univ Autonoma Queretaro, Fac Ciencias Nat, Av Ciencias S-N, Juriquilla 76230, Queretaro, Mexico. E-Mail: israel.carrillo@uaq.mx; monica.queijeiro@uaq.mx; gmalda@uaq.mx; hsuzan@uaq.mx

摘要: Having an aesthetic form is one of the desirable aspects of trees used to create or reforest urban green areas, which is often achieved by procedures that require a great effort. The understanding of factors affecting the architecture of plants in natural conditions may be useful to promote a desirable shape during the growth process. Under the hypothesis that trees in high luminosity conditions have a more aesthetical growth, in this study we explore the relationship between plant shape and photosynthetically active radiation (PAR) in Bursera fagaroides, a characteristic species of the tropical dry forest and xerophytic shrub-lands useful for urban green areas in semiarid environments. To evaluate trees shape we calculate a symmetry index (I-S) by using two diameters of the crown, perpendicular to each other, and the total height. Measurements were made over three periods (before, during and after the growth period); and PAR was also measured for each tree. Linear regressions were used to analyze the relationship between the symmetry of trees and PAR received during the growth period. The post-growth symmetry of trees showed a positive relationship with the PAR received by trees during the growth period, suggesting that PAR effects can be harnessed to develop post-germination strategies for the production of trees with a more aesthetical growth in the studied species. Effect of PAR on the shape of plants may represent a practical option to promote aesthetical growth of trees and shrubs with importance for creation and restoration of urban green areas.