Vol. 11, Issue 12 (2022)

Author(s):
S Kumaravel, P Nandakumar, M Mathialagan, K Maheshwaran, S Gowtham and Sooraj Kumar

Abstract:
World population is increasing year by year. This increase in population increases their demand for food and thus we are forced to increase food production. So although there are various factors to increase the production of rice which is a food source but without plant growth regulators (PGR) it is not possible to increase the food production. So in this compilation we will increase the food production by using PGR. The treatments are T₁ - Gibberellic acid 40% WSG @ 10 gm ha^-1,T₂ - Gibberellic acid 40% WSG @ 20 gm ha^-1, T₃ - Abscisic acid 20% SG @ 60 gm ha^-1, T₄ - Abscisic acid 20% SG @ 30 gm ha^-1,T₅ - Humic acid 12% @ 12.5 l ha^-1, T₆ - Humic acid 12% @ 10 l ha^-1, T₇ - Triacontanol 0.05% EC @ 250 ml ha^-1, T₈ - Triacontanol 0.05% EC @ 150 ml ha^-1, T₉ - Untreated control. Growth regulators viz., Gibberellic acid (GA₃), Humic acid, and Triacontanol were foliar sprayed at active tillering stage and Abscisic acid was foliar sprayed at early grain filling stage of crop growth. The result showed that foliar application of Humic acid 12% @ 12.5 l ha^-1 (T₅) recorded the highest yield attributes viz., Number of panicles m^-2, Number of grains panicle^-1, Thousand Grain weight (g) and yield of rice over the control.