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<p>Sorghum’s intrinsic hardiness constitutes a better adaptability to organic farming, though evidence for performance under such management systems is scarce. This study assessed the agronomic performance of three improved sorghum varieties, namely SAMSORG 44, SAMSORG 47, and SAMSORG 48, under varying rates of poultry manure (0, 2.5, and 5.0 t ha⁻¹). Field trials were conducted during the 2023 and 2024 rainy seasons at the Certified Organic Research Plots, Institute of Food Security, Environmental Resources and Agricultural Research, FUNAAB, between June and December 2023, and at the Organic Agriculture Professionals in Tertiary Institutions in Nigeria, FUNAAB, between September and November 2024. A randomized complete block design with three replications was used. Results showed that poultry manure application had no significant (<i>p</i> &lt; 0.05) effect on days to 50% flowering, 100% flowering, or maturity in both years, though varietal differences were significant (<i>p</i> &lt; 0.05). SAMSORG 44 consistently flowered earliest and reached maturity in the shortest time. In contrast, poultry manure application significantly (<i>p</i> &lt; 0.05) increased dry matter accumulation, plant height, panicle weight, seed weight per plant, threshing percentage, biomass yield, and grain yield. Significant (<i>p</i> &lt; 0.05) interactions between variety and manure rate indicated that the application of 5.0 t ha⁻¹ poultry manure to SAMSORG 44 resulted in the shortest maturation period and the highest grain yield of 2748.4&#xa0;kg ha⁻¹ in 2023 and 2599.1&#xa0;kg ha⁻¹ in 2024. These values were higher than the average yields obtained in Africa (924.8&#xa0;kg ha⁻¹) and the world (2534.2&#xa0;kg ha⁻¹). Therefore, application of 5.0 t ha⁻¹ poultry manure with SAMSORG 44 could be a suitable option for resource-constrained organic sorghum farmers in the humid tropics providing a sustainable strategy for productivity improvement within organic systems.</p>

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Impact of Organic Amendment on the Agronomic Performance of Selected Improved Sorghum (Sorghum Bicolor L. Moench) Varieties in the Humid Tropics

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Olasupo James Fadeyi,
  • Thomas Oladeji Fabunmi,
  • Victor Idowu Olugbenga Olowe,
  • Christopher Olu Adejuyigbe

摘要

Sorghum’s intrinsic hardiness constitutes a better adaptability to organic farming, though evidence for performance under such management systems is scarce. This study assessed the agronomic performance of three improved sorghum varieties, namely SAMSORG 44, SAMSORG 47, and SAMSORG 48, under varying rates of poultry manure (0, 2.5, and 5.0 t ha⁻¹). Field trials were conducted during the 2023 and 2024 rainy seasons at the Certified Organic Research Plots, Institute of Food Security, Environmental Resources and Agricultural Research, FUNAAB, between June and December 2023, and at the Organic Agriculture Professionals in Tertiary Institutions in Nigeria, FUNAAB, between September and November 2024. A randomized complete block design with three replications was used. Results showed that poultry manure application had no significant (p < 0.05) effect on days to 50% flowering, 100% flowering, or maturity in both years, though varietal differences were significant (p < 0.05). SAMSORG 44 consistently flowered earliest and reached maturity in the shortest time. In contrast, poultry manure application significantly (p < 0.05) increased dry matter accumulation, plant height, panicle weight, seed weight per plant, threshing percentage, biomass yield, and grain yield. Significant (p < 0.05) interactions between variety and manure rate indicated that the application of 5.0 t ha⁻¹ poultry manure to SAMSORG 44 resulted in the shortest maturation period and the highest grain yield of 2748.4 kg ha⁻¹ in 2023 and 2599.1 kg ha⁻¹ in 2024. These values were higher than the average yields obtained in Africa (924.8 kg ha⁻¹) and the world (2534.2 kg ha⁻¹). Therefore, application of 5.0 t ha⁻¹ poultry manure with SAMSORG 44 could be a suitable option for resource-constrained organic sorghum farmers in the humid tropics providing a sustainable strategy for productivity improvement within organic systems.