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International Journal of Microbiology
Volume 2017, Article ID 5914786, 11 pages
https://doi.org/10.1155/2017/5914786
Research Article

Preinoculation of Soybean Seeds Treated with Agrichemicals up to 30 Days before Sowing: Technological Innovation for Large-Scale Agriculture

1Total Biotecnologia Indústria e Comércio S/A, Rua Emilio Romani, No. 1190, CIC, Curitiba, PR, Brazil
2Universidade Federal de Santa Catarina, Campus Curitibanos, Rodovia Ulisses Gaboardi, Km 3, Curitibanos, SC, Brazil
3Instituto Federal Goiano, Campus Rio Verde, Rodovia Sul Goiana, Km 01, Caixa Postal 66, Rio Verde, GO, Brazil
4Universidade Federal de Santa Maria, Avenida Roraima, No. 1000, Santa Maria, RS, Brazil
5Embrapa Soja, CP 231, 86001-970 Londrina, PR, Brazil

Correspondence should be addressed to Ricardo Silva Araujo; rb.moc.aigoloncetoiblatot@ojuarasr

Received 20 July 2017; Accepted 30 August 2017; Published 10 October 2017

Academic Editor: Dulal Borthakur

Copyright © 2017 Ricardo Silva Araujo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The cultivation of soybean in Brazil experienced an expressive growth in the last decades. Soybean is highly demanding on nitrogen (N) that must come from fertilizers or from biological fixation. The N supply to the soybean crop in Brazil relies on the inoculation with elite strains of Bradyrhizobium japonicum, B. elkanii, and B. diazoefficiens, which are able to fulfill the crop’s N requirements and enrich the soil for the following crop. The effectiveness of the association between N2-fixing bacteria and soybean plants depends on the efficacy of the inoculation process. Seed treatment with pesticides, especially fungicides or micronutrients, may rapidly kill the inoculated bacteria, affecting the establishment and outcome of the symbiosis. The development of technologies that allow inoculation to become a successful component of industrial seed treatment represents a valuable tool for the seed industry, as well as for the soybean crop worldwide. In this article, we report the results of new technologies, developed by the company Total Biotecnologia Indústria e Comércio S/A of Brazil, for preinoculation of soybean seeds with bradyrhizobia, in the presence of agrichemicals. Our results demonstrate improved bacterial survival for up to 30 days after inoculation, without compromising nodulation, N2-fixation, and yield in the field.