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

Author:

Araujo Ricardo Silva1ORCID,Cruz Sonia Purin da2,Souchie Edson Luiz3ORCID,Martin Thomas Newton4,Nakatani André Shigueyoshi1,Nogueira Marco Antonio5,Hungria Mariangela5

Affiliation:

1. Total Biotecnologia Indústria e Comércio S/A, Rua Emilio Romani, No. 1190, CIC, Curitiba, PR, Brazil

2. Universidade Federal de Santa Catarina, Campus Curitibanos, Rodovia Ulisses Gaboardi, Km 3, Curitibanos, SC, Brazil

3. Instituto Federal Goiano, Campus Rio Verde, Rodovia Sul Goiana, Km 01, Caixa Postal 66, Rio Verde, GO, Brazil

4. Universidade Federal de Santa Maria, Avenida Roraima, No. 1000, Santa Maria, RS, Brazil

5. Embrapa Soja, CP 231, 86001-970 Londrina, PR, Brazil

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 ofBradyrhizobium japonicum, B. elkanii,andB. 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.

Publisher

Hindawi Limited

Subject

Microbiology (medical),Microbiology

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