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BioTechnologia
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2/2021
vol. 102
 
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abstract:
RESEARCH PAPERS

Rhizobacterial inoculation in combination with mineral fertilizer improves maize growth and yield in poor ferruginous soil in center of Benin

Olaréwadjou Amogou
1
,
Agossou P. Noumavo
1, 2
,
Nadège A. Agbodjato
1
,
Haziz Sina
1
,
Gustave Dagbénonbakin
3
,
Marcel Y. Adoko
1
,
Valère K. Salako
4
,
Romain Glèlè Kakaï
4
,
Adolphe Adjanohoun
3
,
Lamine Baba-Moussa
1

  1. Laboratoire de Biologie et de Typage Moleculaire en Microbiologie, Departement de Biochimie et de Biologie Cellulaire, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, Cotonou, Benin
  2. Laboratoire de Microbiologie et des Technologies Alimentaires, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, Cotonou, Bénin
  3. Institut National des Recherches Agricoles du Bénin, Cotonou, Bénin
  4. Laboratoire de Biomathématique et d’Estimation Forestière, Faculty of Agronomic Sciences, University of Abomey-Calavi, Cotonou, Bénin
BioTechnologia vol. 102(2) ∙ pp. 141–155 ∙ 2021
DOI: https://doi.org/10.5114/bta.2021.106520
Online publish date: 2021/07/05
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The use of biotechnological approaches to increase soil fertility and productivity allows to obtain sustainable agriculture with lesser use of chemical fertilizers. The present study aimed to determine whether the inoculation of Bacillus panthothenicus, Bacillus thuringiensis, Pseudomonas putida, Pseudomonas syringae, or Serratia marcescens combined with reduced doses of NPK (nitrogen, phosphorus, potassium) fertilizer can improve the growth and yield of maize on poor ferruginous soils under field conditions in central Benin. For this purpose, maize seeds of the EVDT 97 STR C1 variety were inoculated with 10 ml suspension of five plant growth-promoting rhizobacteria (PGPR) strains, and the plots were fertilized at seeding with the recommended doses (0, 25, 50, 100%) of 200 kg/ha of NPK and 100 kg of urea for corn cultivation. The study was conducted in a completely randomized design with 3 replicates. The results showed that except for P. syringae, which induced the highest fresh aerial biomass (94.51%) and dry aerial biomass (63.63%), all other parameters were positively improved with inoculation associated with reduced doses of NPK + urea. The best height, leaf area, fresh underground biomass, and grain yield were recorded in response to the application of P. syringae + 50% NPK + urea, with an increase of 26.82, 32.23, 107.57, and 30.64%, respectively, compared to those of the control. The inoculation of seeds with P. syringae + 50% NPK + urea can be considered to be an environmentally sustainable strategy for maize cultivation.
keywords:

PGPR, biofertilizer, poor ferruginous soil, Zea mays L, Benin


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