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<p>Soil acidity has become a threat to food security impacting productivity of staple crops in major cereal producing highlands of Ethiopia. An experiment was conducted in three acid soil districts of southern Ethiopia in 2021 and 2022 to investigate effects of combined use of acid soil management strategies on productivity and economic feasibility of barley (<i>Hordeum vulgare</i> L.).&#xa0;Factorial combinations involving various levels of lime, phosphorus (P) and genotype were tested using spilt-split plot design with three replicates. Combined analysis of variance over sites was done using the mixed effects model where lime, P and genotype were assigned as fixed effects whereas site and replications were considered random effects.&#xa0;All main effects and their two factor interactions significantly influenced grain yield consistently over the two years. Top yielding interaction combinations were liming + 30&#xa0;kg P ha<sup>−1</sup>, liming + accession 217176b or cultivar HB-1307 and 30&#xa0;kg P ha<sup>−1</sup> + cultivar HB-1307. The corresponding yield increments were 105, 23 and 598% compared to controls, in that order. These interaction combinations also gave highest net benefits with acceptable marginal rates of return ranging between 248 and 5034%. Grain yield response index for applied P grouped accession 217176b and cultivar HB-1307 under the efficient and responsive category.&#xa0;Raising the P rate from the current 20 to 30&#xa0;kg ha<sup>−1</sup> and its combined use with exchangeable acidity based lime rate along with cultivar HB-1307 is the best option to enhance barley yield and benefit in acid soils of southern Ethiopian highlands.</p>

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Interactions among Acid Soil Management Practices Enhance Grain Yield and Economic Benefit of Barley Production

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Chigign Adamu,
  • Walelign Worku,
  • Berhanu Abate,
  • Alemayehu Kiflu

摘要

Soil acidity has become a threat to food security impacting productivity of staple crops in major cereal producing highlands of Ethiopia. An experiment was conducted in three acid soil districts of southern Ethiopia in 2021 and 2022 to investigate effects of combined use of acid soil management strategies on productivity and economic feasibility of barley (Hordeum vulgare L.). Factorial combinations involving various levels of lime, phosphorus (P) and genotype were tested using spilt-split plot design with three replicates. Combined analysis of variance over sites was done using the mixed effects model where lime, P and genotype were assigned as fixed effects whereas site and replications were considered random effects. All main effects and their two factor interactions significantly influenced grain yield consistently over the two years. Top yielding interaction combinations were liming + 30 kg P ha−1, liming + accession 217176b or cultivar HB-1307 and 30 kg P ha−1 + cultivar HB-1307. The corresponding yield increments were 105, 23 and 598% compared to controls, in that order. These interaction combinations also gave highest net benefits with acceptable marginal rates of return ranging between 248 and 5034%. Grain yield response index for applied P grouped accession 217176b and cultivar HB-1307 under the efficient and responsive category. Raising the P rate from the current 20 to 30 kg ha−1 and its combined use with exchangeable acidity based lime rate along with cultivar HB-1307 is the best option to enhance barley yield and benefit in acid soils of southern Ethiopian highlands.