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Effect of Terminal High Temperature Imposed by Late Sowing on Phenological Traits of Wheat Genotypes

M. Ilias Hossain
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

M. Israil Hossain
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

M. Nur-E- Alam Siddquie
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

M. A. Zaman
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

M. A A Mamun
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

M Jahedul Islam
Regional Wheat Research Centre, Bangladesh Agricultural Research Institute, Shyampur, Rajshahi-6212

Abstract/ Executive Summary:

A field experiment was conducted at Regional Wheat Research Centre, BARl, Rajshahi to study the varietals/genotypic potentiality in heat tolerant tendency and producing maximum yield under heat stress environmental conditions. The experiment was conducted in split plot design with three replications to evaluated four sowing dates were (i) November 25, (ii) December 10, iii) December 25 and iv) January 10 in the main plot and three genotypes/lines were i) BAW 1051, ii) BAW 120, iii) BAW 1141 in sub plot. In overall performance BAW 1141 was better performance among in heat stress and late seeding condition of January 10, but BAW 1120 was better performance in early seeding condition than other genotypes. However, BAW 1141 should be recommended in late seeding as well as heat stress condition and BAW 1120 should be recommended in early sowing situation.

Keywords: Wheat genotypes, Late sowing, Seeding

Location: Regional Wheat Research Centre, Bangladesh Agricultural Research institute, Rajshahi

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Risk Management in Agriculture

Commodity: Wheat

Objectives:

To study the varietals/genotypic potentiality of wheat in heat tolerant tendency and producing maximum yield under heat stress environmental conditions.

Methodology:

The field experiment was initiated at Regional Wheat Research Centre, Bangladesh Agricultural Research institute, Rajshahi (lat 24° N, long 90°3 'E. 8 m elev.) stating with a wheat crop in 2009-10. The soil of the experimental field belongs to AEZ 11 characterized by flood free highland, fine in texture (Silty loam), poor in organic matter (1.1 %) and total N (0.07%) content. The annual rainfall at the research field ranged from about 800 mm to 1200 mm of which about 90% of the total rainfall occurred in monsoon during July to October. The rest periods are dry to severely dry thus the entire wheat growing period of both the years were dry with very negligible precipitation in first wheat season and 5.2 cm of rain during second week of December. The experiment comprises the combination of four levels of sowing time and three advanced lines tested in a split plot design. Sowing time starting from November 25, December 10, December 25 and January 10 were assigned in main plots and three genotypes were BAW 1051, BAW 1120 and BAW 1141 were imposed in the subplots. The size of each sub-plot was 5m X 4m and there were gaps of 1m. 1.5m and 1.5 m between the sub-plots, main plots and replications, respectively. Seeds of each genotypes were sown continuously in 20 cm spaced line at the rate of 120 kg ha^-1. Fertilizers at the rates of 120 kg N, 30 kg P. 50 kg K, 20 kg Sand 1.5 kg B ha^-1 were applied as urea, triple super phosphate, murate of potash, gypsum, and boric acid, respectively. All fertilizers including two-third urea were uniformly applied in the field during final land preparation. The rest of urea was top dressed at the crown root initiation (CRI) stage at 21 days after sowing (DAS). The crop was irrigated uniformly to bring the soil moisture near to field capacity during 20, 50 and 75 DAS. At maturity the wheat crop was harvested on 25th March. All the data were statistically analyzed and the mean values were tested by the least significant difference (LSD) at 5% level of significance.

Source of Information: Annual Research Report 2011-12, RWRC, BARI, Rajshahi, Page:48-53, Publication June 2012

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In overall, performance of BAW 1141 was better among genotypes/lines in heat stress and late seeding condition of January 10, but BAW 1120 was better performance in early seeding condition than other genotypes. However, BAW 1141 should be recommended in late seeding as well as heat stress condition and BAW 1120 should be recommended in early sowing situation.

Knowledge Management: Report/Proceedings