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Impact of nitrogen fertilizer sustainability on corn crop yield: the role of beneficial microbial inoculation interactions.
Galindo, Fernando Shintate; Pagliari, Paulo Humberto; da Silva, Edson Cabral; de Lima, Bruno Horschut; Fernandes, Guilherme Carlos; Thiengo, Cassio Carlette; Bernardes, João Victor Silva; Jalal, Arshad; Oliveira, Carlos Eduardo Silva; de Sousa Vilela, Lucila; Furlani Junior, Enes; Nogueira, Thiago Assis Rodrigues; do Nascimento, Vagner; Teixeira Filho, Marcelo Carvalho Minhoto; Lavres, José.
Afiliación
  • Galindo FS; College of Agricultural and Technological Sciences, Department of Crop Production, São Paulo State University, Dracena, 17900-000, Brazil. fernando.galindo@unesp.br.
  • Pagliari PH; Southwest Research and Outreach Center, Department of Soil, Water, and Climate, University of Minnesota, Lamberton, MN, 56152, USA.
  • da Silva EC; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • de Lima BH; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • Fernandes GC; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • Thiengo CC; Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, 13416-000, Brazil.
  • Bernardes JVS; Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, 13416-000, Brazil.
  • Jalal A; King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
  • Oliveira CES; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • de Sousa Vilela L; College of Agricultural and Technological Sciences, Department of Crop Production, São Paulo State University, Dracena, 17900-000, Brazil.
  • Furlani Junior E; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • Nogueira TAR; Department of Agricultural Sciences, São Paulo State University, Jaboticabal, 14884-900, Brazil.
  • do Nascimento V; College of Agricultural and Technological Sciences, Department of Crop Production, São Paulo State University, Dracena, 17900-000, Brazil.
  • Teixeira Filho MCM; Department of Plant Health, Rural Engineering, and Soils, São Paulo State University, Ilha Solteira, 15345-000, Brazil.
  • Lavres J; Center for Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, 13416-000, Brazil.
BMC Plant Biol ; 24(1): 268, 2024 Apr 11.
Article en En | MEDLINE | ID: mdl-38605320
ABSTRACT

BACKGROUND:

Considering the challenges posed by nitrogen (N) pollution and its impact on food security and sustainability, it is crucial to develop management techniques that optimize N fertilization in croplands. Our research intended to explore the potential benefits of co-inoculation with Azospirillum brasilense and Bacillus subtilis combined with N application rates on corn plants. The study focused on evaluating corn photosynthesis-related parameters, oxidative stress assay, and physiological nutrient use parameters. Focus was placed on the eventual improved capacity of plants to recover N from applied fertilizers (AFR) and enhance N use efficiency (NUE) during photosynthesis. The two-year field trial involved four seed inoculation treatments (control, A. brasilense, B. subtilis, and A. brasilense + B. subtilis) and five N application rates (0 to 240 kg N ha-1, applied as side-dress).

RESULTS:

Our results suggested that the combined effects of microbial consortia and adequate N-application rates played a crucial role in N-recovery; enhanced NUE; increased N accumulation, leaf chlorophyll index (LCI), and shoot and root growth; consequently improving corn grain yield. The integration of inoculation and adequate N rates upregulated CO2 uptake and assimilation, transpiration, and water use efficiency, while downregulated oxidative stress.

CONCLUSIONS:

The results indicated that the optimum N application rate could be reduced from 240 to 175 kg N ha-1 while increasing corn yield by 5.2%. Furthermore, our findings suggest that replacing 240 by 175 kg N ha-1 of N fertilizer (-65 kg N ha-1) with microbial consortia would reduce CO2 emission by 682.5 kg CO2 -e ha-1. Excessive N application, mainly with the presence of beneficial bacteria, can disrupt N-balance in the plant, alter soil and bacteria levels, and ultimately affect plant growth and yield. Hence, highlighting the importance of adequate N management to maximize the benefits of inoculation in agriculture and to counteract N loss from agricultural systems intensification.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Zea mays / Fertilizantes Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Zea mays / Fertilizantes Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido