Vol. 16 No. 3
Yield maximization through higher fertilization and lodging management in irrigated timely sown wheat (Triticum aestivum L.) under eastern sub-Himalayan plains
Author(s): T. MONDAL, B. MITRA, A. ROY. CHOWDHURY AND S. DAS
Abstract: An experiment was conducted during rabi season of 2016-17 and 2017-18 under eastern sub-Himalayan plains of West Bengal, India with the objective to maximize grain yield of wheat (Triticum aestivum L.) through higher fertilization and lodging management. The design of the experiment was split-plot with 4 nutrient management options viz. No application of fertilizer (F0); Recommended dose (RD) (150, 60, 40kg N, P2O5, K2O ha-1) (F1); 150% RD(225, 90, 60 kg N,P2O5,K2O kg ha-1) (F2); 150% RD (225, 90, 60 N, P2O5, K2O kg ha-1) + 15 t ha-1 FYM (F3) in main-plots and 4 growth regulator spraying options viz. No spaying of chemicals, spraying of water twice (G0); spraying of chlormequat chloride twice (G1); spraying of tebuconazole twice (G2); spraying of chlormequat chloride + tebuconazole twice (G3)in sub-plots each replicated thrice. It was revealed that 150% RD + 15 t ha-1 FYM treatment recorded the highest grain yield (5.61 t ha-1) followed by 150% R Donly (5.30 t ha-1). Chlormequat chloride (0.2%) + tebuconazole (0.1%) spray at 1st node and flag leaf development stage provided lowest lodging score(1.65) reflecting its reliability in lodging management. Thus 150% RD with lodging management through chlormequat chloride (0.2%) + tebuconazole(0.1%) sprayingtwiceat 1st node and flag leaf stage indicated its superiority in terms of benefit: costratio (B:C) (2.51:1) with higher agronomic N use efficiency (ANUE) (23.84 kg grain kg N-1) and economic N use efficiency (ENUE) (2.80 kg grain invested in N-1).
Download Full Article: Click Here