Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

  • Print ISSN 0367-6722

  • Online ISSN 0976-0555

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  • SJR .282 (2022)

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Shalini Jhanji*, D.S. Gill
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1Department of Botany, Punjab Agricultural University, Ludhiana - 141 004, India.
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Cite article:- Jhanji* Shalini, Gill D.S. (2023). PHENOLOGICAL DEVELOPMENT AND HEAT UNIT REQUIREMENT OF WHEAT UNDER DIFFERENT DATES OF SOWING. Indian Journal of Animal Research. 45(2): 161- 166. doi: .
A field experiment was conducted to work out relationship between heat unit requirement and phenophases of two wheat cultivars (PBW-343 and WH-542 ) under different dates of sowing (2 November , 1 December  and 4 January). Growth duration and heat unit requirement of different phenophases was distinct for two cultivars, and showed a decline with delay in sowing. High temperature during reproductive development in late-sown crop forced the plants to attain maturity. For all phenological stages, plants of timely-sown crop accumulated more heat units in both cultivars than late-sown crop. The pheno-thermal indices decreased during vegetative stages but increased during reproductive phenophase with delay in sowing. The cultivar, PBW-343 took more number of days, accumulated more heat units and used heat more efficiently; and thus produced higher grain yield than WH-542. The timely-sown crop used heat more efficiently and yielded higher than late-sown crop. It was concluded that timely- sown crop exhibited best growth and grain yield as the favorable environmental conditions coincided with heat unit requirement of different phenophases of wheat.
  1. Akhtar, M., Cheema, M.S., Jamil, M. and Ali, L. (2006) Effect of time of sowing on some important characters of wheat (Triticum aestivum L.) genotypes. J. Agric. Res. 44(4): 255-259.
  2. Bazgeer, S., Mahey, R.K., Sidhu, S.S., Sharma, P.K., Sood, A., Noorian, A.M. and Kamali, G. (2009) Wheat yield prediction using remotely sensed agromet trend-based models for Hoshiarpur district of Punjab, India. J. Applied. Sci. 8(3): 510-515.
  3. Esfandiary, F., Aghaie, G., and Mehr, A.D. (2009) Wheat Yield Prediction through Agro Meteorological Indices for Ardebil District. Int. J. Biol. Life Sci. 1(2): 48-51.
  4. Ghosh, D.C., Nandi, P. and De, B. (2000) Phenological development and productivity of wheat (Triticum aestivum L.) at different dates of sowing. Indian J. Agric. Sci. 70(6): 390-395.
  5. Khichar, M. L. and Niwas, R. (2007) Thermal effect on growth and yield of wheat under different sowing environments and planting systems. Indian J. Agric. Res. 41(2): 92-96.
  6. Nagarajan, S., Anand, A. and Chaudhary, H.B. (2008) Response of spring wheat (Triticum aestivum L.) genotypes under changing environment during grain filling period. Indian J. Agric. Sci. 78(2): 177-179.
  7. Pal, S.K., Verma, V.N., Singh, M.K. and Thakur, R. (1996) Heat unit requirement for phonological development of wheat (Triticum aestivum L.) under different levels of irrigation, seeding date and fertilizer. Indian J. Agric. Sci. 66: 397- 400.
  8. Paul, N.K. and Sarker, D.K. (2000) Accumulated heat units and phenology relationships in wheat as influenced by sowing dates. Bangladesh J. Bot. 29(1): 49- 54.
  9. Phadnawis, B.N. and Saini, A.D. (1992) Photothermal effects on tiller survival of wheat. Ann. Plant Physiol. 6: 262-67.
  10. Sandhu, I.S., Sharma, A.R. and Sur, H.S. (1999) Yield performance and heat unit requirement of wheat (Triticum aestivum L.) varieties as affected by sowing dates under rain fed conditions. Ind. J. Agric. Sci. 69: 175-179.
  11. Singh, A.K., Mishra, S.R. and Tripathi, P. (2001) Phenology, growing degree days and phasic development model of wheat (Triticum aestivum L.) under rice (Oryza sativa L.) wheat cropping system. Ind. J. Agric. Sci. 71: 363-366.

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