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<p>Sorghum is the main staple crop grown for food and feed in eastern Ethiopia. However, in the majorities of sorghum- producing areas of this area the parasitic weed<i>, Striga hermonthica</i> is the main bottleneck in reducing the productivity of the crop. Hence, in 2019 and 2020 cropping seasons field experiments were conducted in Fedis district, eastern Ethiopia to assess the interaction effects of common bean intercropping and blended NPS fertilizer on severity reduction of the weed and productivity of the crop. The treatment combinations consisted of four levels of NPS blended fertilizer (0, 50, 100, and 150&#xa0;kg&#xa0;ha-1 NPS) in a factorial arrangement in a randomized complete block design with three replications, using susceptible sorghum variety (<i>Teshale)</i> and common bean variety (<i>Dursitu</i>), with planting densities of (25%, 50%, and 75%). Results from the analysis of variance indicated that treatment interactions on Striga infestation caused highly significant (<i>p</i> &lt; 0.001) changes. The combination of 50% common bean and 100&#xa0;kg&#xa0;ha-1 NPS blended fertilizer application resulted in the lowest Striga count (2 Striga shoots) per plot, whereas the single planted susceptible sorghum variety (Teshale) produced the highest Striga count (8 Striga shoots) per plot. The main findings of this study consequently indicated that the host crop (sorghum) was supported by a 60% reduction in <i>Striga hermonthica</i> severity level when NPS fertilizer and common bean were combined. The combination of 50% common bean planting density and 100&#xa0;kg NPS ha<sup>−1</sup> blended fertilizer application yielded the maximum (2.54 t ha<sup>−1</sup>) grain yield of sorghum, while the control plot produced the lowest (0.98 t ha-1) grain yield. Hence, farmers in the study area could manage Striga and improve sorghum productivity through the combination of common bean with NPS blended fertilizer under natural Striga infestation.</p>

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Interaction of Intercropped Common Bean and NPS Blended Fertilizer application reduced the severity of Striga hermontica infestation and enhanced the productivity of Sorghum in Fedis, Eastern Ethiopia

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Lemma Degebasa,
  • Taye Tessema,
  • Zelalem Bekeko,
  • Ketema Belete

摘要

Sorghum is the main staple crop grown for food and feed in eastern Ethiopia. However, in the majorities of sorghum- producing areas of this area the parasitic weed, Striga hermonthica is the main bottleneck in reducing the productivity of the crop. Hence, in 2019 and 2020 cropping seasons field experiments were conducted in Fedis district, eastern Ethiopia to assess the interaction effects of common bean intercropping and blended NPS fertilizer on severity reduction of the weed and productivity of the crop. The treatment combinations consisted of four levels of NPS blended fertilizer (0, 50, 100, and 150 kg ha-1 NPS) in a factorial arrangement in a randomized complete block design with three replications, using susceptible sorghum variety (Teshale) and common bean variety (Dursitu), with planting densities of (25%, 50%, and 75%). Results from the analysis of variance indicated that treatment interactions on Striga infestation caused highly significant (p < 0.001) changes. The combination of 50% common bean and 100 kg ha-1 NPS blended fertilizer application resulted in the lowest Striga count (2 Striga shoots) per plot, whereas the single planted susceptible sorghum variety (Teshale) produced the highest Striga count (8 Striga shoots) per plot. The main findings of this study consequently indicated that the host crop (sorghum) was supported by a 60% reduction in Striga hermonthica severity level when NPS fertilizer and common bean were combined. The combination of 50% common bean planting density and 100 kg NPS ha−1 blended fertilizer application yielded the maximum (2.54 t ha−1) grain yield of sorghum, while the control plot produced the lowest (0.98 t ha-1) grain yield. Hence, farmers in the study area could manage Striga and improve sorghum productivity through the combination of common bean with NPS blended fertilizer under natural Striga infestation.