ISHS Acta Horticulturae 620: XXVI International Horticultural Congress: Asian Plants with Unique Horticultural Potential: Genetic Resources, Cultural Practices, and Utilization
PHENOLOGY OF SOME LANDSCAPE TREE SPECIES UNDER SEMI-ARID CONDITIONS OF HARYANA STATE, INDIA |
| Author: | D.S. Dahiya |
| Keywords: | Tree height, spread, canopy, flowering |
| Abstract:
Phenological observations are given on 44 species of ornamental trees encompassing 23 botanical families growing on about 300 ha well-developed and landscaped campus of the university. Observations on growth and flowering parameters were recorded for one complete calendar year. Twelve trees were small in height (< 10m), 22 medium (10-15 m) and 10 were large-sized (>15 m), whereas the spread of 18 trees was small (< 6 m) and rest of 26 trees had large crown spread (> 6m). A total of eight canopy shapes were recorded; out of which 12 trees had hemispherical shape, 4 pyramidal and spreading each, 1 upright and columnar each, 7 weeping, 3 open headed and 12 trees had irregular shapes. Growth pattern of trees was evergreen – 22, deciduous –16 and semi-deciduous – 6. Three distinct phonological categories could be recognized on flowering: species flowering once a year (86.36%), twice a year (4.54%), and species that did not produced flowers (9.10%). Thirteen species produced small flowers (< 2 cm), 10 medium (2-4 cm) and rest 11 large flowers (> 4 cm). This study is of immense importance to landscape horticulturists or architects for their use in similar climatic conditions. | |
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