04333nab a2200349 i 4500003000900000005001700009008004100026040001800067072001400085072000800099100003100107100002700138100002800165100002900193100003000222100002400252100003200276100002400308245010000332500005500432520145800487520158901945650002203534650001103556650001503567650003203582650001903614773024303633856008003876942000803956999001903964BR-BrBNA20250609195828.0250609b2023    bl.mr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aP34b1440  aH50  aNascimento, Elka C. S. do   aSouza, Allesson R. de   aNascimento, Ronaldo do   aSilva, André A. R. da   aBezerra, Carlos V. de C.   aLima, Robson F. de   aGuimarães, Rafaela F. B.   aBatista, Mateus C.   aCo-inoculation with Bradyrhizobium spp. and Azospirillum brasilense in cowpea under salt stress  aPublicação on-line; 28 ref.; Sumaries (En, Pt)  a

ABSTRACT: Plants grown under salinity are subject to many morphological and physiological disorders. In this context, practices that can enable the use of saline water are essential. The deleterious effects of salinity can be mitigated by using beneficial microorganisms, especially diazotrophic bacteria. In this context, this study aimed to evaluate the effect of bacterial inoculation and co-inoculation using Bradyrhizobium spp. and Azospirillum brasilense on the growth, nodulation and production of cowpea under salt stress. The experiment was conducted using a randomized block design, in a 4 × 5 factorial arrangement, corresponding to four nitrogen sources (N1 - without nitrogen and without inoculant; N2 - fertilization with mineral nitrogen and without inoculant; N3 - inoculation of Bradyrhizobium spp.; and N4 - co-inoculation of Bradyrhizobium spp. and Azospirillum brasilense) and five values of electrical conductivity of irrigation water - ECw (0.4, 1.9, 3.4, 4.9 and 6.4 dS m-1), with five replicates. Co-inoculation with Azospirillum brasilense and Bradyrhizobium spp. favors the growth, production and nodulation of cowpea plants up to ECw of 0.4 dS m-1. Increase in the electrical conductivity of irrigation water negatively affects the growth, production and nodulation of cowpea plants in Corujinha variety, regardless of the nitrogen source used.

Key words: Vigna unguiculata L. Walp., salinity, biological nitrogen fixation  a

RESUMO: Plantas cultivadas sob salinidade estão sujeitas a muitos distúrbios morfológicos e fisiológicos. Neste sentido, práticas que possam viabilizar o uso de águas salinas são essenciais. Os efeitos deletérios da salinidade podem ser mitigados ao utilizar microrganismos benéficos, especialmente bactérias diazotróficas. Nesse contexto, objetivouse avaliar o efeito da inoculação e co-inoculação bacteriana utilizando Bradyrhizobium spp. e Azospirillum brasilense no crescimento, nodulação e produção de feijão-caupi sob estresse salino. O experimento foi conduzido em blocos casualizados, em arranjo fatorial 4 × 5, sendo quatro fontes de nitrogênio (F1 - sem nitrogênio e sem inoculante; F2 - adubação com nitrogênio mineral e sem inoculante; F3 - inoculação de Bradyrhizobium ssp. e F4 - coinoculação de Bradyrhizobium ssp. e Azospirillum brasilense) e cinco valores de condutividade elétrica da água de irrigação - CEa (0,4; 1,9; 3,4; 4,9 e 6,4 dS m-1), com cinco repetições. A coinoculação com Azospirillum brasilense e Bradyrhizobium favoreceu o crescimento, a produção e a nodulação de plantas de feijão caupi quando irrigadas até CEa de 0,4 dS m-1. O aumento da condutividade elétrica da água de irrigação afetou negativamente o crescimento, a produção e a nodulação de plantas de feijão Caupi da variedade Corujinha independentemente da fonte de nitrogênio utilizada.

Palavras-chave: Vigna unguiculata L. Walp, salinidade, fixação biológica de nitrogênio  aFEIJÃO DE CORDA  aSTRESS  aSALINIDADE  aFIXAÇÃO DE NITROGÊNIO  aINOCULAÇÃO0 035349317829dCampina Grande-PB Universidade Federal de Campina Grande. Centro de Ciências e Tecnologia 1997o2024-4548tRevista Brasileira de Engenharia Agrícola e Ambiental (Brazil)x1415-4366gv. 27 (1) p. 3-8; (2023)wBR2025001432  uhttps://www.scielo.br/j/rbeaa/a/VVfPDpmtNrYQ6hHPjFmv7TJ/?format=pdf&lang=en  cANA  c331972d331972