Abstract
The stagnant crop productivity and declining factor productivity especially under rice-wheat system in changing climate scenario demand the adoption of nutrient responsive high yielding climate-resilient varieties. Considering these challenges, the present study was conducted during two consecutive Rabi seasons of 2020-21 and 2021-22 with an aim to improve wheat productivity through appropriate combinations of genotypes, nutrient management and plant growth regulators (PGRs). The experiment was conducted in split-plot design with two nutrient levels {recommended dose of fertilizer (RDF) as 150:60:40 kg N, P2O5 and K2O ha-1, respectively, and 150% RDF + 15 t FYM (farm yard manure) ha-1 + two sprays of PGRs consisting of tank-mix of chlormequat chloride @ 400 g + tebuconazole @ 172 g ha-1 at the first node and flag leaf stage} in main-plots and nine genotypes (DBW187, DBW303, DBW327, DBW332, DBW370, DBW371, DBW372, HD3086 and PBW872) in sub-plots. The plant height significantly reduced while earheads m-2 and grains m-2 improved with PGRs application under high fertility which led to increased (12.6%) mean grain yield over RDF. Among genotypes, maximum yield was observed for DBW370 (67.84 q ha-1) followed by PBW872, DBW371 and DBW372. Nutrient management and genotype interaction revealed that more grains m-2 in DBW370 led to maximum yield (66.2 q ha-1) at RDF while bolder grains in PBW872 made it top yielder (71.16 q ha-1) under high fertility condition. It is concluded that productivity of modern wheat cultivars can be improved through higher fertility and tank-mix application of chlormequat + tebuconazole.
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Authors thankfully acknowledge the support provided by ICAR–Indian Institute of Wheat and Barley Research, Karnal, Haryana, India during the conduct of this research. The help provided by Dr. Kailash Prajapat, ICAR-CSSRI, Karnal, in statistical analysis is duly acknowledged.
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Chhokar, R.S., Kumar, N., Gill, S.C. et al. Enhancing Wheat Productivity Through Genotypes and Growth Regulators Application Under Higher Fertility Conditions in Sub-humid Climate. Int. J. Plant Prod. 18, 85–95 (2024). https://doi.org/10.1007/s42106-023-00277-w
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DOI: https://doi.org/10.1007/s42106-023-00277-w