Inoculation with Plant Growth-Promoting Bacteria and Nitrogen Doses Improves Wheat Productivity and Nitrogen Use Efficiency

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  • Rafaela Neris Gaspareto
  • Arshad Jalal
  • William Cesar Nishimoto Ito
  • Carlos Eduardo da Silva Oliveira
  • Cassia Maria de Paula Garcia
  • Eduardo Henrique Marcandalli Boleta
  • Poliana Aparecida Leonel Rosa
  • Fernando Shintate Galindo
  • Salatier Buzetti
  • Ghaley, Bhim Bahadur
  • Marcelo Carvalho Minhoto Teixeira Filho

Wheat is one of the staple foods of the global population due to its adaptability to a wide range of environments. Nitrogen is one of the crucial limiting factors in wheat production and is considered a challenge to food security. Therefore, sustainable agricultural technologies such as seed inoculation with plant growth-promoting bacteria (PGPBs) can be adopted to promote biological nitrogen fixation (BNF) for higher crop productivity. In this context, the objective of the current study was to evaluate the effects of nitrogen fertilization and seed inoculations with Azospirillum brasilense, Bacillus subtilis and A. brasilense + B. subtilis on agronomic and yield attributes, grain yield, grain N accumulation, N use efficiency and applied N recovery in Brazilian Cerrado, which consists of gramineous woody savanna. The experiment was carried out in two cropping seasons in Rhodic Haplustox soil under a no-tillage system. The experiment was designed in a randomized complete block in a 4 x 5 factorial scheme, with four replications. The treatments consisted of four seed inoculations (control-without inoculation, inoculation with A. brasilense, B. subtilis and A. brasilense + B. subtilis) under five N doses (0, 40, 80, 120 and 160 kg ha(-1), applied from urea) at the wheat tillering stage. Seed co-inoculation with A. brasilense + B. subtilis increased grain N accumulation, number of spikes m(-1), grains spike(-1) and grain yield of wheat in an irrigated no-tillage system of tropical savannah, regardless of the applied N doses. Nitrogen fertilization at a dose of 80 kg ha(-1) significantly increased grain N accumulation and number of grains spikes(-1) and nitrogen use efficiency. Recovery of applied N was increased with inoculation of B. subtilis and co-inoculation of A. brasilense + B. subtilis at increasing N doses. Therefore, N fertilization can be reduced by the inclusion of co-inoculation with A. brasilense + B. subtilis in the cultivation of winter wheat under a no-tillage system of Brazilian Cerrado.

Original languageEnglish
Article number1046
JournalMicroorganisms
Volume11
Issue number4
Number of pages14
ISSN2076-2607
DOIs
Publication statusPublished - 2023

    Research areas

  • Triticum aestivum L, microorganisms, nitrogen fertilization, grain yield, cereal inoculation, nitrogen use efficiency, NUTRIENT EFFICIENCY, NO TILL, FERTILIZATION, YIELD, CERRADO, MAP

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