PJB-2017-267
Leaf phenology characteristics of greening tree species and implications for greening in coastal saline land
Xiaolei Zhao, Hong Jiang, Hongyu Du, Bin He and Yongli Cai
Abstract
Phenological characteristics of greening tree species in coastal saline land can not only determine the best afforestation time, but also guide the landscape configuration of plant communities. Taking 28 greening tree species in coastal saline area as the study objects, we investigated and analyzed the leaf emergence and leaf abscission phenology for one year in 2015. We found that the beginning of leaf emergence was from mid-March to early May, 2015 and mainly concentrated in the mid to late April, 2015 and the ending of leaf emergence was from early April to late May, 2015. Afforestation time for introducing 28 greening tree species was suggested from March to May. The beginning of leaf abscission ranged from early October to early November, 2015 and was mainly concentrated in October, 2015, while the ending of leaf abscission ranged from early November, 2015 to early January, 2016 and mainly concentrated in the period from late November to late December, 2015. According to the time of leaf emergence and the time of leaf abscission, the 28 tree species were divided into four categories. Tree species in the same category had the relative synchronicities and were similar in phenological matching relationship in leaf emergence and leaf abscission phenology. Therefore, they had certain mutual replacement function in landscape configuration. Landscape configuration of tree species could be conducted according to time of leaf emergence and leaf abscission. Tree species with early or late leaf emergence time and with early or late leaf abscission time could be planted together.
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