Seybold Report ISSN: 1533-9211
R. Bharani Vijay and R. Sendhilnathan
Department of Horticulture, Faculty of Agriculture, Annamalai University, Annamalainagar, Tamil Nadu, India.
Corresponding author Email ID: vijaysrivijay502@gmail.com
Vol 17, No 12 ( 2022 ) | Licensing: CC 4.0 | Pg no: 3014-3025 | Published on: 07-12-2022
Abstract
A field experiment was conducted to study the “Standardization of different levels of pruning and growth regulators on the performance of Ixora (Ixora coccinea L.) Cv. Red” at Manickapuram village, Thiruchirappalli District, Tamil Nadu during the year 2020 - 21. The treatment comprises of three different levels of pruning at 30 cm, 45 cm and 60 cm along with three different growth regulators viz., GA3 @ 150 ppm, NAA @ 150 ppm and Ethrel @ 150 ppm alone and without application of growth regulator to pruned plants (Control). The experiment was laid out in Factorial Randomized Block Design (FRBD) with three replications consists of twelve treatments. Considering all the treatments, observation recorded on growth, physiological and flower yield parameters, the treatment (T5) was significantly increased when compare to control (with out application of growth regulators to the pruned plants). Growth parameters viz., plant height (93.62 cm and 105.23 cm), number of branches (82.96 and 90.66), number of leaves (3038.19 and 3197.04) at 240 and 300 days after pruning and canopy spread N-S (133.04 cm), E-W (135.01 cm) at 240 DAP respectively. With regard to physiological and yield parameters viz., leaf length (8.01 cm), leaf width ( 5.21 cm), leaf area index (2.64 cm2), chlorophyll content index (CCI) ( 11.85 mg g-1), dry matter production ( 44.65 g plant-1), number of flower heads plant-1 (36.73), number of florets flower head-1 (54.18), fresh weight of flower head (9.01 g) and flower yield (330.93 g plant-1) it was recorded maximum when pruning was done at 45 cm height above the ground level along with foliar application of GA3 @ 150 ppm. From the above studies, it is revealed that pruning at 45 cm along with foliar application of GA3 @ 150 ppm were found to be the best in increasing the plant growth, physiological and flower yield attributes in Ixora coccinea .
Keywords:
Pruning, Growth regulator, Ixora