Response of Zinnia Cultivars to Different Levels of Humic Acid
Response of Zinnia Cultivars to Different Levels of Humic Acid
Imran Ullah Khan*, Noor Ul Amin, Sayyed Hamad Ahmad Shah, Maqsood Khan, Shehzad Ahmad and Syed Aizaz Ali Shah
ABSTRACT
This experiment was performed in Ornamental Nursery at the Department of Horticulture, The University of Agriculture Peshawar during 2016. The experiment was laid out on Randomized Complete Block Design (RCBD) with split plot arrangement and replicated three times. Seedlings of Zinnia cultivars (Dahlia, Candy Cane, and Dream land) were tested against five different levels of humic acid (0, 2.5, 5, 7.5, and 10 kg ha-1). Experimental data was collected on days to flowering, plant height (cm), number of leaves plant-1, leaf area (cm2), number of branches plant-1, number of flower plant-1, diameter of flower (cm), fresh flower weigh (g), flower stalk length (cm) and flower vase life. The above mentioned parameters are highly influenced by most of humic acid levels. The increment value were shown on humic acid at the rate of 10 kg ha ‑1 for days to flowering (21.2 days), plant height (85.0 cm), number of leaves plant-1 (183.7), leaf area (56.7 cm2), number of branches plant-1 (15.9), number of flower plant-1 (18.4), flower diameter (9.8 cm), fresh flower weight (12.9 g), flower stalk length (16.9 cm) and flower vase life (7.0 days), while among different cultivars, “Dahlia” showed minimum days to flowering (23.9), maximum plant height (96.3 cm), flower weight (14.7 g), flower diameter (9.6 cm) and leaf area (62.1 cm2). Cultivar Candy Cane showed maximum number of leaves plant-1 (190), number of branches plant-1 (14.6), flower stalk length (17.1 cm), and flower vase life (6.1 days), whereas number of flower plant-1 (16) was found maximum in cultivar “Dream land”. The cultivar and humic acid interaction was not significant in all parameters. Zinnia Cv. Dahlia and Candy Cane both adapted to the agro-climatic conditions of Peshawar. Humic acid level at the rate of 10 kg ha-1 showed better results upon application to Zinnia and hence it is suggested for best production.
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