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<p>The effects of biochar, its combination with poultry manure with different nitrogen (N) levels on maize production on the Andosol and Nitisol was studied. Treatments were factorial combinations of three organic amendments (OA) (biochar - B, poultry manure - PM and B co-composted with PM - BPM) as main-plot factor and four N levels (0, 50, 75 and 100&#xa0;kg N/ha) as sub-plot factor, laid out as split-plot design and replicated thrice at two sites: Kinigi with Andosol and Rwerere with Nitisol. At both sites, there was general increase in maize total N uptake, aboveground biomass (AGB) and grain yield in response to increase in N level. A multifactorial analysis showed significant (<i>p</i> ≤ 0.001) differences between Kinigi and Rwerere for nearly all measured parameters, with BPM at 100&#xa0;kg N/ha having better performance on maize total N uptake, AGB and grain yield for Rwerere as compared to Kinigi. Significant Site*OA*N levels interaction effect was observed for grain N uptake (<i>p</i> ≤ 0.01), total N uptake (<i>p</i> ≤ 0.001), agronomic efficiency (<i>p</i> &lt; 0.05) and grain yield (<i>p</i> ≤ 0.001), and highest grain yields were attained at 100&#xa0;kg N/ha, with PM for Kinigi and BPM for Rwerere. Significant OA*N levels interaction effect was observed for apparent nitrogen recovery efficiency (ANRE) (<i>p</i> &lt; 0.05) and grain yield (<i>p</i> ≤ 0.01), highlighting synergistic effects of OA and N levels on maize ANRE and grain yield. Overall, the integration of PM (10 t/ha) and 100&#xa0;kg N/ha is suitable for Kinigi, while the integration of BPM (10 t/ha) and 100&#xa0;kg N/ha is good for Rwerere.</p>

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Effects of biochar and its combination with poultry manure on nitrogen use efficiency, growth, and yield of maize under different nitrogen fertilization levels

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月15日

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  • Charles Lwanga Twagiramungu,
  • Bobe Bedadi,
  • Claver Ngaboyisonga,
  • Concorde Nsengumuremyi,
  • David Fangueiro

摘要

The effects of biochar, its combination with poultry manure with different nitrogen (N) levels on maize production on the Andosol and Nitisol was studied. Treatments were factorial combinations of three organic amendments (OA) (biochar - B, poultry manure - PM and B co-composted with PM - BPM) as main-plot factor and four N levels (0, 50, 75 and 100 kg N/ha) as sub-plot factor, laid out as split-plot design and replicated thrice at two sites: Kinigi with Andosol and Rwerere with Nitisol. At both sites, there was general increase in maize total N uptake, aboveground biomass (AGB) and grain yield in response to increase in N level. A multifactorial analysis showed significant (p ≤ 0.001) differences between Kinigi and Rwerere for nearly all measured parameters, with BPM at 100 kg N/ha having better performance on maize total N uptake, AGB and grain yield for Rwerere as compared to Kinigi. Significant Site*OA*N levels interaction effect was observed for grain N uptake (p ≤ 0.01), total N uptake (p ≤ 0.001), agronomic efficiency (p < 0.05) and grain yield (p ≤ 0.001), and highest grain yields were attained at 100 kg N/ha, with PM for Kinigi and BPM for Rwerere. Significant OA*N levels interaction effect was observed for apparent nitrogen recovery efficiency (ANRE) (p < 0.05) and grain yield (p ≤ 0.01), highlighting synergistic effects of OA and N levels on maize ANRE and grain yield. Overall, the integration of PM (10 t/ha) and 100 kg N/ha is suitable for Kinigi, while the integration of BPM (10 t/ha) and 100 kg N/ha is good for Rwerere.