JOURNAL OF AGRICULTURAL SCIENCE AND PRACTICE
Integrity Research Journals
ISSN: 2536-7072
Model: Open Access/Peer Reviewed
DOI: 10.31248/JASP
Start Year: 2016
Email: jasp@integrityresjournals.org
Effect of foliar application of gibberellic acid (GA3) on quality attributes of calendula flowers (Calendula officinalis) cv. Gitana Fiesta in Chitwan, Nepal
https://doi.org/10.31248/JASP2020.219 | Article Number: E992617A2 | Vol.5 (4) - August 2020
Received Date: 06 July 2020 | Accepted Date: 11 August 2020 | Published Date: 30 August 2020
Authors: Bishal Shrestha* , Ashmita Karki and Jenny Shrestha
Keywords: Calendula, flower quality, flower size, gibberellic acid.
An experiment was conducted to study the effect of gibberellic acid (GA3) on quality attributes of calendula (Calendula officinalis L.). Single factorial experiment based on completely randomized design including 7 treatments and 3 replications was carried out. The treatments used were different concentrations of GA3 (0, 50, 100,150, 200, 250 and 300 ppm). Results showed that foliar application of GA3 had positive effect on quality of calendula flowers. First bud initiation and first flowering were recorded significantly earlier (p<0.05) if plants were sprayed with T5 (GA3@200ppm) treatment. Similarly, the study showed that the maximum flower diameter (6.43 cm) was recorded in T6 (GA3@250ppm) which was significantly similar (p>0.05) to T5 (GA3@200ppm) treatment whereas minimum flower diameter (4.19 cm) was recorded in control. Significant differences (p<0.05) among treatments were recorded in weight of flower where maximum weight of flower (3.77 gm) was recorded in T6 (GA3@250ppm), while minimum weight of flower (2.86 gm) was recorded in control plants. These results suggest that GA3 of dose 200 ppm to 250 ppm was ideal for enhancing the quality of flowers in calendula.
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