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<p>This research explores the optimization of raised bed (RB) widths for wheat (<i>Triticum aestivum</i> L.) cultivation under irrigation within the agricultural setting of Bangladesh, aiming at yield maximization, enhanced water use efficiency (WUE), and soil moisture conservation amidst escalating water scarcity. This experimental study with a randomized complete block design was laid out at the field irrigation laboratory of Bangladesh Agricultural University in Mymensingh to assess the impact of various bed sizes i.e., widths (25&#xa0;cm, 45&#xa0;cm, and 65&#xa0;cm) on wheat growth and, yield attributes, and water productivity, in comparison with conventional flood irrigation (CI). The experiment revealed that the RB45 configuration (45&#xa0;cm bed width) significantly outperformed the other treatments by achieving the highest grain yield of 3.93 ± 0.11&#xa0;t/ha and demonstrating superior water productivity of 1.33 ± 0.01&#xa0;kg/m<sup>3</sup>. These outcomes were attributed to its optimal balance between water conservation and soil moisture regulation, thus highlighting its effectiveness in improving both yield and WUE. While the RB65 treatment saved the most water (36.92% over CI), its yield was lower due to inadequate water distribution across the beds. Conversely, the RB25 treatment, despite ensuring better bed wetting, resulted in a lower yield due to a decrease in cultivable area, stemming from an increased number of furrows. Interestingly, soil moisture content comparisons across treatments showed that CI maintained higher moisture at the surface level (0–10&#xa0;cm), while the RB45 treatment exhibited greater soil moisture content at deeper layers (20–60&#xa0;cm), indicating efficient water distribution that supports root development. The study’s findings underscore the critical importance of selecting the appropriate bed width for sustainable wheat farming in semi-arid environments. By demonstrating the efficacy of the RB45 treatment in balancing water savings with yield improvements, this research provides valuable insights for the strategic implementation of RB widths.</p>

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Optimizing raised bed widths with conserving furrow irrigation: effects on crop-water productivity and soil moisture in wheat cultivation in Bangladesh

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Md. Touhidul Islam,
  • K. M. Kulsum Akter,
  • Nilima Das,
  • Nusrat Jahan,
  • Mohammed Mizanur Rahman,
  • A. K. M. Adham

摘要

This research explores the optimization of raised bed (RB) widths for wheat (Triticum aestivum L.) cultivation under irrigation within the agricultural setting of Bangladesh, aiming at yield maximization, enhanced water use efficiency (WUE), and soil moisture conservation amidst escalating water scarcity. This experimental study with a randomized complete block design was laid out at the field irrigation laboratory of Bangladesh Agricultural University in Mymensingh to assess the impact of various bed sizes i.e., widths (25 cm, 45 cm, and 65 cm) on wheat growth and, yield attributes, and water productivity, in comparison with conventional flood irrigation (CI). The experiment revealed that the RB45 configuration (45 cm bed width) significantly outperformed the other treatments by achieving the highest grain yield of 3.93 ± 0.11 t/ha and demonstrating superior water productivity of 1.33 ± 0.01 kg/m3. These outcomes were attributed to its optimal balance between water conservation and soil moisture regulation, thus highlighting its effectiveness in improving both yield and WUE. While the RB65 treatment saved the most water (36.92% over CI), its yield was lower due to inadequate water distribution across the beds. Conversely, the RB25 treatment, despite ensuring better bed wetting, resulted in a lower yield due to a decrease in cultivable area, stemming from an increased number of furrows. Interestingly, soil moisture content comparisons across treatments showed that CI maintained higher moisture at the surface level (0–10 cm), while the RB45 treatment exhibited greater soil moisture content at deeper layers (20–60 cm), indicating efficient water distribution that supports root development. The study’s findings underscore the critical importance of selecting the appropriate bed width for sustainable wheat farming in semi-arid environments. By demonstrating the efficacy of the RB45 treatment in balancing water savings with yield improvements, this research provides valuable insights for the strategic implementation of RB widths.