Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (9): 3671-3688.DOI: 10.1016/j.jia.2025.03.002

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  • 收稿日期:2024-08-13 修回日期:2025-03-11 接受日期:2025-01-15 出版日期:2025-09-20 发布日期:2025-08-11

System fertilization improves soil quality and increases primary production in an integrated crop-livestock system

Vicente José Laamon Pinto Simões1#, Lóren Pacheco Duarte1, Rafaela Dulcieli Daneluz Rintzel2, Amanda Posselt Martins2, Tales Tiecher2, Leonardo Dallabrida Mori1, Carolina Bremm1, Marco Aurélio Carbone Carneiro3, Paulo César de Faccio Carvalho1   

  1. 1 Department of Forage Plants and Agrometeorology, Integrated Crop-Livestock System Research Group (GPSIPA), Federal University of Rio Grande do Sul, Porto Alegre 91540-000, Brazil

    2 Department of Soil Science, Interdisciplinary Research Group on Environmental Biogeochemistry (IRGEB), Federal University of Rio Grande do Sul, Porto Alegre 91540-000, Brazil

    3 Laboratory of Soil Microbiology and Environmental Geochemistry, Department of Soil Science, Federal University of Lavras, Lavras 37200-000, Brazil

  • Received:2024-08-13 Revised:2025-03-11 Accepted:2025-01-15 Online:2025-09-20 Published:2025-08-11
  • About author:#Correspondence Vicente José Laamon Pinto Simões, E-mail: laamoneng.agro@gmail.com
  • Supported by:

    This study was funded by the Fundação Agrisus through project code ‘PA3010/20’, and the Coordination for the Improvement of Higher Education Personnel, Brasil, under Finance Code 001.

Abstract:

Managing fertilization in integrated crop-livestock systems (ICLS) during periods of low nutrient export, known as system fertilization, can optimize nutrient use by enhancing the soil’s biochemical and physical-hydric properties.  However, interdisciplinary studies on processes that improve input utilization in ICLS remain scarce.  This study aimed to assess the relationships between the efficiencies of different nutrient management strategies in ICLS and pure crop systems (PCS) and the biochemical and physical-hydric quality of soil.  Two fertilization strategies (system fertilization and crop fertilization) and two cropping systems (ICLS and PCS) were evaluated in a randomized block design with three replicates.  In the PCS, soybean was grown followed by ryegrass as a cover crop.  In the ICLS, sheep grazed on the ryegrass.  In the crop fertilization, phosphorus and potassium were applied to the soybean planting, and nitrogen was applied in the ryegrass establishment.  Nitrogen, phosphorus, and potassium were applied during ryegrass establishment in the system fertilization.  Soil quality indexes were calculated using fourteen physical-hydric and biochemical soil indicators, and primary production and nutrient utilization efficiency were evaluated.  System fertilization in ICLS enhanced the soil functions of water storage and availability for plants, structural stability, and resistance to degradation.  System fertilization in ICLS improved the soil quality by 14% over PCS and 13% over crop fertilization in ICLS.  Notably, this optimized system yielded the highest primary production.  These findings underscore the pivotal role of system fertilization in ICLS to boost food production and enhance soil ecosystem services without increasing the consumption of external fertilizers.  They advocate for a strategic shift towards system-level fertilization in integrated systems, and demonstrate for the first time in ICLS, the delicate balance between nutrient management, soil health, and sustainable productivity.


Key words: crop-livestock integration , soil functions ,  nutrient use efficiency ,  nutrient management