to evaluate the effects of different mulches and environmental conditions on growth, quality and yield of carnation cut flowers under naturally ventilated polyhouse conditions. Different types of mulch were replicated six times in a plot of 1.0 × 1.0 m size. Mulching with spent mushroom compost (M1), grass (M2), pine needles (M3) along with control (M0) was done 15 days after transplanting of rooted cuttings. The results revealed that plants mulched with spent mushroom compost (M1) recorded maximum duration of flowering (28.77 & 28.97 days), minimum days taken to reach harvesting stage (141 & 132.33 days), highest number of cut flowers per plant (6.50 & 9.47) and vase life (18.30 & 23.37 days) during first and second flush, respectively as compared to control. The maximum temperature and relative humidity inside greenhouse were 39.8ºC and 85 %, respectively. However, maximum soil temperature was recorded in the plots mulched with pine needles.
Studies were conducted to study the effect of different holding solutions on vase life and associated characteristics of cut carnation (Dianthus caryophyllus L.) flowers. Serotonin (300 uM) resulted in earliest flower opening, maximum flower diameter, maximum amount of holding solution consumption, maximum score for freshness of cut flowers, maximum RWC and maximum membrane stability. Cut flowers exhibited highest vase life of 27.37 days when placed in serotonin (300 uM) followed by 24.67 days in holding solution containing sucrose (2%) + 8HQC (150ppm) + BA (5ppm). Therefore, serotonin (300 uM) can be used as a noble environmental friendly alternative holding solution in floriculture industry to replace harmful chemical compounds which are being used to increase flower longevity of carnation cut flowers.
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