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Paper Details

Effect of thermal stress management strategies on yield and yield attributes of wheat (Triticum aestivum L.) under late sown conditions

JUGAL K. MANI* AND RAJ SINGH

Journal Title:International Journal of Agricultural Sciences
Abstract


Field experiment was conducted at research farm, Department of Agricultural Meteorology, CCS HAU, Hisar located at 29 10' N latitude, 75 46' E longitude and 215.2 m altitude during Rabi season of 2007-08 and 2008-09 (Last week of December) to study the effect of thermal stress management strategies on yield and yield attributes of wheat under late sown conditions. The grain, straw and biological yields were maximum in T5 (3803, 5829 and 9632 kg ha-1, respectively) and these were lower in T1 (3504, 5617 and 9121 kg ha-1, respectively) during 2007-08. During 2008-09, the grain, straw and biological yields were maximum in T5 (3713, 5814 and 9527 kg ha-1, respectively) and these were lowest in T1 (3417, 5598 and 9016 kg ha-1, respectively). The harvest and attraction index were maximum in T3 (39.6 and 65.5%, respectively) and these were minimum in T1 (38.4 and 62.4%, respectively) during 2007-08. During 2008-09, harvest and attraction index were maximum in T3 (39.1 and 64.1%, respectively) and minimum in T1 (37.9 and 61.0%, respectively). Among post anthesis strategies, the highest grain and biological (3758 and 9659 kg ha-1 in 2007-08) and (3666 and 9551 kg ha-1 in 2008-09) was observed in S3. The harvest and attraction index were statistically at par among all the treatments during both the crop seasons. The pooled LAI (r = 0.94), LAD (r = 0.96), CGR (r = 0.98) at vegetative and the pooled LAI (r = 0.92), LAD (r = 0.98), CGR (r = 0.78) at reproductive phase have shown highly significant and positive correlation with grain yield

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