Response of different plant growth regulators on fruit yield of Brinjal

摘要

The experiment was conducted at Instructional cum Research Farm, Department of Horticulture, Biswanath College of Agriculture (AAU) Biswanath Chariali, Sonitpur district of Assam during 2014-15 in order to study the response of plant growth regulatorson physiogical and fruit yield of brinjal (Solanum melongena L.) cv. JC -1. The experiment was laid out in a Randomized Block Design with ten treatments replicated three times. The details of treatment comprised of GA3 (25, 50 and 100 ppm), IAA (25, 50and 100 ppm), NAA (25, 50 and 100 ppm) and control (distilled water). During the period of investigation the growth regulators showed significant response on physiological and yield attributing characters of brinjal. The result revealed that the maximumleaf area index (2.82) was recorded under GA3 at100 ppm (T3) while GA3 at 50 ppm (T2) recorded the highest (802.40 g) total dry weight per plant at harvest. However, the highest leaf chlorophyll content index (44.50) was recorded under treatment with NAAat 50 ppm (T8). Foliar application GA3 at 50 ppm (T2) exhibited significantly higher total number of flower per plant (38.49), number of fruit per plant (18.56) and fruit yield (1.58 kg plant and 377.00 q ha~(-1)). It may be concluded from the experiments that GA3 proved to be the best in improving the physiological and yield attributing parameters in brinjal.