National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Field experiment was conducted during Rabi season of 2010-11 and 2011-12 at Research farm of CCS Haryana Agricultural University, Hisar, India to study agrometeorological indices on phenology and yield of wheat cultivars as influenced by Late, very late sown heat stress condition. The experiment was laid out in split plot design with two sowing time viz., late (16th Dec.) and very late (5th Jan.) in main plot and four late sown genotypes (PBW 373, WH 1021, PBW 590 and PBW 550) in sub plots with three replications. On the basis of two years pooled data it was revealed that 16th Dec. sown wheat took maximum calendar days (129 days), GDD (1546 0C day), HTU (11421 0days hour) and PTU (18143 0days hour) for all the phenophases upto maturity, which got reduced significantly with very late sowing of wheat on 5th Jan., grain yield and biological yield recorded with 16th Dec. sown crop were significantly higher by 14.8 and 13.2 percent over very late sowing of 5th Jan. Among the varieties, PBW 550 was recorded with maximum effective tillers/m2 (419), highest grain (44.5 q/ha), biological yield (114 q/ha), GY HUE (3.02 kg ha-1 day-1) and BY HUE (7.74 kg ha-1 day-1). PBW 373 recorded maximum GDD (926 and 1540 0C day), HTU (6416 and 11689 0days hour), PTU (10554 and 18222 0days hour) and PTI (10.2 and 12.7 0C days day-1) upto heading and maturity. Due to very late sowing (5th Jan.), maximum reduction in grain yield of about 17.1 percent was recorded in PBW 550, followed by PBW 373 (14.7%) and PBW 590 (14.7%) and minimum reduction in WH 1021 (12.5%) as compared to 16th Dec. sown crop.
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