Influence of split application of different levels of NPK through drip fertigation on growth and flowering of chrysanthemum (Dendranthema grandiflora Tzvelev)
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Date
2021-09
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was conducted during 2019-20 and 2020-21 at Model Floriculture Centre, Department of Horticulture, G.B. Pant University of Agriculture and Technology, Pantnagar. The experiment was laid out in randomized block design with five treatments and four replications. The water soluble fertilizer and straight fertilizers were used which were applied through drip system and soil application. The treatments used were NPK @ 100:150:100 kg/ha/year (T1 i.e. control), NPK @ 100:150:100 kg/ha/year (T2), NPK @100:150:100 kg/ha/year (T3), NPK @ 75:112.5:75 kg/ha/year (T4) and NPK @ 75:112.5:75 kg/ha/year (T5). Observations were recorded on vegetative growth, flowering, post-harvest life and soil nutrient status. Results revealed that treatment T3 was found most superior than other treatments and resulted in higher plant height, maximum plant spread, number of primary branches, number of leaves (181.34) and length of branch. This treatment also showed improved flowering traits like earliest flower bud appearance (48.24 days), flower bud diameter, number of flowers per branch, flower buds per plant, 50 per cent flowering, flower diameter (9.02 cm), duration of flowering (47.46 days), yield of flowers, weight of cut flower, number of cut flowers per plant (11.03), number of cut flowers per hectare (5,26,990.00), chlorophyll content a, b as well as total chlorophyll and carotene content. The significant differences were obtained in post-harvest traits viz., weight of flower bud, final weight of flower in vase, diameter of flower, final diameter of flower in vase, amount of water absorbed (96.83 mL), vase life (14.88 days) and shelf life (7.17 days). For soil nutrient status, maximum organic carbon, available nitrogen, available phosphorus, available potassium and maximum B:C ratio were observed under T3 treatment and treatment T1 recorded minimum values of all of the above parameters.