NITROGEN MANAGEMENT WITH MINERALS AND MICROORGANISMS
DOI:
https://doi.org/10.47820/recima21.v6i11.7039Keywords:
sustainable management, nitrogen use efficiency, biological N fixationAbstract
The low efficiency of nitrogen (N) use in corn cultivation represents an economic and environmental challenge, with losses exceeding 50% of the N applied. Bio-inputs containing growth-promoting microorganisms emerge as a sustainable alternative to increase N absorption and reduce dependence on mineral fertilizers. This study aimed to evaluate the agronomic performance of 15 combinations of bio-inputs and urea, under the hypothesis that microbial co-inoculation associated with mineral N increases physiological and productive efficiency compared to conventional fertilization. The experiment was conducted in a randomized block design with four replicates in the 2025/2025 crop season under field conditions in Paraná. The standard area showed a productivity of 4,200 kg ha⁻¹, while the formulations combined with urea promoted increases of more than 25%, with Methylobacterium sp. Code 1 + urea (5,337 kg ha⁻¹), Utrischa N + urea (5,299 kg ha⁻¹), Methylobacterium sp. Code 2 + urea (5,295.4 kg ha⁻¹), and Biolotto + urea (5,265 kg ha⁻¹). Microorganisms such as Azospirillum brasilense ab-V5 and ab-V6 also showed consistent increases. The results suggest that the integration of microorganisms and mineral N is an effective strategy for increasing productivity and improving sustainable nitrogen management. The results indicate the agronomic potential of the combined application of microorganisms, suggesting the need for further trials in multiple environments and economic analysis for large-scale validation. The integration of bio-inputs and mineral fertilizers increases production performance and represents an efficient strategy for sustainable nitrogen management in corn cultivation.
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