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Potential of Supplemental Irrigation for Increasing the Yield of Wheat

Anwar Iqbal
PSO (Soils)
Bangladesh Agricultural Research Council, Farmgate, Dhaka-1215, Bangladesh.

Indrajit Roy
SSO(Crops)
Bangladesh Agricultural Research Council, Farmgate, Dhaka-1215, Bangladesh.

Z. Karim
Bangladesh Agricultural Research Council, Farmgate, Dhaka-1215, Bangladesh.

Abstract/ Executive Summary:

The paper examines different aspects of supplemental irrigation for increasing the yield of wheat. The crop is grown during the dry Rabi season, predominantly under rice-wheat rotations. Long duration of dry days coupled with soil water deficit cause the wheat crop to suffer from frequent droughts. The intensity of droughts in different agroecologieal zones of the country vary depending on pre-sowing rainfall, frequency of dry days, prevalence of extreme higher temperatures and the amount of profile stored residual moisture from the preceding monsoon. The evaluation revealed that,maximum sensitivity to moisture stress occurs during crown root initiation and tiller formation stage and later at grain-filling stage. In general, yield losses due to drought vary between 60-70% in very severe and between 50-60% in severe drought-prone areas of the country. Supplemental irrigation at critical growth stages of the crop can increase the yield of wheat as far as 50%. This offers potential opportunities for increased production of wheat

Keywords: Supplemental irrigation,Yield, Wheat

Location: All over Bangladesh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

Examine different aspects for increasing the yield of wheat with particular emphasis on supplemental irrigation for area expansion and higher productivity.

Methodology:

Based on the secondary information of different sources, identified the major constraints in wheat cultivation . As wheat in Bangladesh is grown during dry Rabi season; evaluated the drought situation as is influenced by climatic and edaphaic factors along with the impact of drought on the growth and yield of wheat. Drought prone areas relocated and analyzed. Results obtained used to assess the response of wheat to supplemental irrigation and the growth stages of the crop as per sensitivity.

Source of Information: Bangladesh J. Sci. Res. 10(2):189-195, 1992 (December)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The crop shows maximum sensitivity to moisture stress during crown root initiation and tiller formation stage and later at grain-filling stage. In general, yield losses due to drought vary between 60 and 70% in very severe and between 50 and 60% in severe drought-prone areas of the country. Supplemental irrigation at critical growth stages of the crop can increase the yield of wheat as far as 50%. This offers potential opportunities for increased production of wheat.

Knowledge Management: Journal