Abstract
Abstract: The objective of this work was to evaluate the economic viability of the co-inoculation with Rhizobium tropici and Azospirillum brasilense in the Pérola cultivar of common bean (Phaseolus vulgaris), under sprinkler irrigation, in commercial and family farming in the states of Minas Gerais and Goiás, Brazil. For the analysis of economic viability, data from seven field experiments that evaluated the agronomic performance of common bean co-inoculated with R. tropici and A. brasilense, at six different sites, in three cropping seasons, were used. In these experiments, the treatments consisted of: non-inoculated control; N-fertilizer treatment; and different doses and forms of inoculum application. The economic analysis was performed based on market prices and indices as a function of the grain production of the different treatments. Economic viability was analyzed using the partial budgeting method. The best economic performance was obtained with the treatment R. tropici + three doses of A. brasilense sprayed on plants, which resulted in return rates of 90% in Goiás and 114% in Minas Gerais, for commercial farming, and of 13% in Goiás for family farming. For commercial and family farming, the production cost when using N fertilizer is 5.0 and 8.5% higher, respectively, than that with the co-inoculation of two doses of R. tropici and three doses of A. brasilense.
Highlights
Common bean (Phaseolus vulgaris L.) is grown in three annual crop seasons in Brazil
The objective of this work was to evaluate the economic viability of the co-inoculation with Rhizobium tropici and Azospirillum brasilense in the Pérola cultivar of common bean (Phaseolus vulgaris), under sprinkler irrigation, in commercial and family farming in the states of Minas Gerais and Goiás, Brazil
The best economic performance was obtained with the treatment R. tropici + three doses of A. brasilense sprayed on plants, which resulted in return rates of 90% in Goiás and 114% in Minas Gerais, for commercial farming, and of 13% in Goiás for family farming
Summary
The first is during spring-summer, mainly in the Southern and Southeastern regions of the country. The second occurs during summer-autumn in the Southern, Southeastern, and Midwestern regions. According to Embrapa Arroz e Feijão (2020), in 2017, common bean production in the first and second crop seasons was 1.20 and 0.88 million tons, respectively. The area harvested with common bean was 723.1 and 759.6 thousand hectares, respectively, with yields of 1,667 and 1,159 kg ha-1, in the first and second harvests. The irrigated crop produced 539 thousand tons of common bean, harvested in 207 thousand hectares, with an average yield of 2,598 kg ha-1. The irrigated common bean crop represents 25.9 and 14.0% of the common bean production and area harvested in the country, respectively
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