Sulfur fertilization and inoculation of soybean with Azospirillum brasilense and Bradyrhizobium spp. can improve grain yield and quality.

Autor: Deak EA; Departamento de Fitotecnia, Universidade Federal de Santa Maria - UFSM, Santa Maria, Rio Grande do Sul, Brazil., Martin TN; Departamento de Fitotecnia, Universidade Federal de Santa Maria - UFSM, Santa Maria, Rio Grande do Sul, Brazil. martin.ufsm@gmail.com., Stecca JDL; Departamento de Fitotecnia, Universidade Federal de Santa Maria - UFSM, Santa Maria, Rio Grande do Sul, Brazil., Conceição GM; Universidade Regional do Noroeste do Estado do Rio Grande do Sul - UNIJUÍ, Ijuí, Rio Grande do Sul, Brazil., Ferreira MM; Departamento de Fitotecnia, Universidade Federal de Santa Maria - UFSM, Santa Maria, Rio Grande do Sul, Brazil., Rumpel VS; Universidade Regional do Noroeste do Estado do Rio Grande do Sul - UNIJUÍ, Ijuí, Rio Grande do Sul, Brazil., Grolli Carvalho AF; União de Ensino do Sudoeste do Paraná - UNISEP, Dois Vizinhos, Paraná, Brazil., Baena FJL; Departamento de Microbiología de la Universidad de Sevilla, Sevilla, Spain.
Jazyk: angličtina
Zdroj: Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] [Braz J Microbiol] 2024 Dec 12. Date of Electronic Publication: 2024 Dec 12.
DOI: 10.1007/s42770-024-01585-7
Abstrakt: The success of biological nitrogen fixation (BNF) in soybean depends on two crucial factors, viz., seed inoculation and soil nutritional balance. The macronutrient sulfur (S) is vital to the formation of ferredoxin, a common source of electrons that controls the proper functioning of the subunits of the enzyme nitrogenase, responsible for the conversion of atmospheric nitrogen (N 2 ) to ammonia (NH 3 + ). However, as the S dynamics is a complex process in soil, it may cause to the plants to be sulfur limited. This study aims at assessing the relationship between S fertilization through the use of elemental-S, and bacterial inoculation (Bradyrhizobium spp.) and co-inoculation (Bradyrhizobium spp. and Azospirillum brasilense) on nodulation, production and quality of soybean. The study was performed on the 2017/2018 and 2018/2019 crop seasons, involving four experiments where two were carried out in Santa Maria and two in Augusto Pestana, Rio Grande do Sul, Brazil. Adopting the randomized experimental block design, the treatments included a 3 × 4 factorial design, with three inoculations (Non-inoculated control, Inoculation and Co-inoculation) together with four doses of S (0, 20, 40 and 60 kg ha - 1 ). Evaluations were done of the plant nodulation, accumulation of shoot dry matter, yield constituents, and quality of the soybean grain. S fertilization and co-inoculation promote an increase in plant nodulation, proving to be an important strategy to support nitrogen supply to soybean crops. The application of elemental sulfur in doses between 20 and 40 kg ha - 1 promotes nodulation, the accumulation of dry mass of plants, the productivity and quality of soybeans, in addition to benefiting nodulation when combined with co-inoculation of Bradyrhizobium ssp. and Azospirillum brasilense.
Competing Interests: Declarations. Conflict of interest: The authors declare no conflict of interest related to the publication of this manuscript.
(© 2024. The Author(s) under exclusive licence to Sociedade Brasileira de Microbiologia.)
Databáze: MEDLINE
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