Yield dynamics of wheat (Triticum aestivum L.) in relation to different seeding rate and seed priming under late and very late sowing conditions
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Date
2022
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Punjab Agricultural University, Ludhiana
Abstract
A field experiment entitled “Yield dynamics of wheat (Triticum aestivum L.) in relation to different seeding rate and seed priming under late and very late sowing conditions” was conducted during rabi season 2021-22 at Regional Research Station (RRS), Gurdaspur and Punjab Agricultural University, Ludhiana. The experiment was laid out in split plot design having three replications with combination of two sowing dates such as late sown (1st week of December) and very late sown (3 nd week of January), and with three seed rates (100, 112.5 and 125 kg ha-1 ) were kept in main plot. In sub-plot four treatments of priming were taken (control, Water priming, Salicylic acid priming and Sea weed extract priming). The late sown crop recorded significantly higher emergence count, growth parameters, tiller density, days taken to phenological stages, normalized difference vegetation index (NDVI), leaf area index (LAI) and canopy temperature depression (CTD) as compared to very late sowing. The higher pollen viability and biochemical characteristics were also recorded in late sowing wheat whereas very late sown wheat recorded significantly higher proline content, total soluble sugars and protein content. The late sown wheat recorded significantly higher spike length, number of grains per ear, 1000-grain weight, grain yield, straw yield and harvest index. The higher grain appearance, grain hardness, hectolitre weight, gluten index and Sodium dodecyl sulphate (SDS) sedimentation was also under late sown crop. The 125 kg ha-1 seed rate recorded significantly higher emergence count, dry matter accumulation, NDVI, LAI, CTD, effective tillers, grain and straw yield than other seed rates. The other quality parameters and biochemical characteristics remained non significant in relation to different seed rates. The seed priming with salicylic acid (75ppm) recorded significantly higher emergence count, tiller density, dry matter accumulation and delayed the days taken to earing and physiological maturity. The effective tillers, 1000-grain weight, grain appearance, grain yield and straw yield was significantly highest in salicylic acid priming which was also statistically similar to sea weed extract priming. The late sown wheat, 125 kg ha-1 seed rate and salicylic acid priming significantly increased the grain yield and also the net returns.
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Harvir Singh (2022). Yield dynamics of wheat (Triticum aestivum L.) in relation to different seeding rate and seed priming under late and very late sowing conditions (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.