Abstract
A field experiment was conducted during 2015-2017 at CSIR-Institute of Himalayan Bioresource Technology, Palampur, India to calculate agro-meteorological indices and to study the duration of different phenological phases of damask rose (Rosa damascena) varieties under mid hills of western Himalayas. Agro-meteorological indices were computed for two damask rose varieties Himroz and Jwalaat different pruning time from October 30 to January 15 at fifteen days’ interval. The results indicated that the number of days required forattaining each phenological stage, decreased with delay in pruning time. Variation in different phenological stages of damask rose varieties were observed. Higher GDD, PTU and HTU were accounted by Jwala as compared to Himroz during all the phenophases of R. damascena. Plants pruned on January 15 (late pruning) required lesser GDD, PTU as well as HTU, while plants pruned on October 30 (early pruning) accumulated higher GDD, PTU and HTU during crop growth period. The results showedthat agro-meteorological indices play a vital role in the productivity of R. damascenacrop.
Highlights
Roses are believed to be pruned every year regularly for proper growth and development and it increases the aesthetic values like the quality of the flowers and larger blooms with inspiring color
Phenological parameters viz.,days taken for pruning to leaf bud formation, days taken for leaf bud to flower bud formation, days taken for flower bud to flower initiation, days taken for flower initiation to complete flower harvestand total days taken for pruning to complete flower harvest were recorded during the cropping period
The calendar of different phenological stages for damask rose wasinfluenced by different pruning time for two different varieties Himroz and Jwala
Summary
Roses are believed to be pruned every year regularly for proper growth and development and it increases the aesthetic values like the quality of the flowers and larger blooms with inspiring color. Pruning in roses ease the harvesting of flowers, and maintain the plant in proper shape and other intercultural operations. Crop weather relationship studies in aromatic plants are very meager and need attention. Though some attempts earlier have been made for medicinal and aromatic crops viz., wild marigold (Kumar et al, 2010), clary sage (Personnel communication), stevia (Kumar et al, 2010) and mentha (Braret al., 2015). The objective of the present study was to ascertain the role of meteorological parameters in crop growth and development of R. damascena varieties under mid hill conditions of western Himalayas
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