Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields.
hdl:11529/11084
Version: 1– Released: Wed Sep 27 05:16:49 CDT 2017
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Krupnik, T.J., Ahmed, Z.U., Timsina, J., Shahjahan, Md., Kurishi, A.S.M.A., Rahman, S. Miah, A.A., Gathala, M.K., McDonald, A.J. 2015. Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields. Field Crops Research. 170: 1–7.
ID: DOI:10.1016/j.fcr.2014.09.019
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Data Citation Details
SubtitlePerformance of new wheat genotypes under different sowing dates and nitrogen rates in southern Bangladesh, Rabi Season 2011-12, 2012-2013
Study Global IDhdl:11529/11084
AuthorsTimothy J. Krupnik (International Maize and Wheat Improvement Center); Zia Uddin Ahmed (International Maize and Wheat Improvement Center); Jagadish Timsina (Melbourne School of Land and Enviornment, University of Melbourne, Australia); Md. Shahjahan (International Maize and Wheat Improvement Center); A.S.M. Alanuzzaman Kurishi (International Maize and Wheat Improvement Center); Azahar A. Miah (International Maize and Wheat Improvement Center); B.M. Saidur Rahman (International Maize and Wheat Improvement Center); Mahesh K. Gathala (International Maize and Wheat Improvement Center); Andrew J. McDonald (International Maize and Wheat Improvement Center)
ProducerInternational Maize and Wheat Improvement Center (CIMMYT) Logo; International Rice Research Institute (IRRI) Logo; International Food Policy Research Institute (IFPRI) Logo
Production Date2014
Production PlaceBangladesh
Funding AgencyUSAID and Bill & Melinda Gates Foundation (BMGF)
DistributorInternational Maize and Wheat Improvement Center (CIMMYT) Logo; International Rice Research Institute (IRRI) Logo; International Food Policy Research Institute (IFPRI) Logo
Distributor ContactTimothy J. Krupnik (CIMMYT Bangladesh), t.krupnik@cgiar.org
Distribution Date2017
DepositorAshok Rai
Deposit DateSeptember 27, 2017
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Description and Scope
Description

Working with 64 farmers ineight production environments, we examined yield response to three genotypes, BG25 and BG27 (with salinity - and heat - tolerant traits) and BG21 (local check), across a gradient of sowing dates, grouped as ‘early’ (sown before 15 December) and ‘late’ (after 15 December), under 0, 100 and 133 and 0, 67 and 100 kg N ha-1 for early- and late-sowing groups, respectively.

Across environments and genotypes, yield ranged from 2.11 to 4.77 t ha-1(mean: 3.9 t ha-1) under early-sowing, and from 0.83 to 4.27 t ha-1(mean: 2.74 t ha-1) under late-sowing. Wheat performance varied with environment (1.68 - 4.77 t ha-1 at 100 kg N ha-1across sowing groups); the lowest yields found where early sowing was delayed and soil salinity levels were elevated. Small but significant (P less than 0.001) yield differences (0.22 t ha-1) were found between 100 and 133 kg N ha-1 for the early-sowing group, though no difference was found between 67and 100 kg N ha-1 for late-sowing. Combining early- and late-sowing groups, significant environment x N rate and sowing-group x N rate interactions (both P less than 0.001) for 100 kg N ha-1 indicated the importance of site-and time-specific N management in these stress-prone environments.

Considering all cultivars and environments, ECa at sowing, flowering and grain filling negatively correlated with yield (r = - 0.50, - 0.59 and - 0.54, all P less than 0.001). Correlations with ground water depth at flowering and grain filling were negative and significant, but less pronounced in the context of farmer-managed irrigation scheduling. Despite putative stress-tolerance traits in two of the three entries, no genotypic yield differences were found under early-sowing, though small differences (less than 0.19 t ha-1) were observed with late sowing. Agronomic fertilizer-N efficiency (AE-N) was consistently higher for 100 than 133 and 67 than 100 kg N ha-1 for early- and late-sowing. The marginal economic value of N application followed similar trends, indicating that rates of at most 100 and 67 kg N ha-1 are favorable for sowing before or after December 15th.

Keywordswheat (AGROVOC); genotypes (AGROVOC); fallow (AGROVOC); nitrogen fertilizers (AGROVOC); sowing date (AGROVOC); coastal area (AGROVOC); Bangladesh (AGROVOC)
Time Period Covered2011 - 2013
Date of Collection2011 - 2013
Data Availability
Number of Files 3
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"Forgoing the fallow in Bangladesh’s stress-prone coastal deltaic environments: Effect of sowing date, nitrogen, and genotype on wheat yield in farmers’ fields.", hdl:11529/11084