Respostas fisiológicas e produtividade de feijoeiro cultivado em sistema silviagrícola com diferentes manejos de adubação

Abstract

The agroforestry systems are models of integrated production composed by agricultural and forest species, becoming important the selection of crop species adapted to the shading conditions. Thus, this study evaluated the physiological responses and productivity components of the two common bean cultivars (‘Pérola’ and ‘Dama’) co-inoculated with Rhizobium tropici and Azospirillum brasilense and cultivated in an agroforestry system with different fertilization management (urea, sodium molybdate, natural P and NPK) in the North of Minas Gerais State, Brazil. Net CO2 assimilation rate, intercellular CO2 concentration, total shoot dry matter, number of nodules in roots, foliar nitrogen content, number of pods per plant, grain per pod and grains per plant, weight of 100 grains and productivity of grains were analyzed. The data obtained were submitted to analysis of variance and the means were compared by the Tukey test (p <0.05) using R software. The common bean co-inoculation with different fertilization management did not influenced the CO2 assimilation rate of the ‘Pérola’ and ‘Dama’ cultivars. Molybdenum and nitrogen fertilization in top dressing does not increase the number of nodules in the roots, but increases the productivity of common bean in the integrated production system. The ‘Pérola’ cultivar presents higher productivity in relation to the ‘Dama’ cultivar in agroforestry system, being indicated for planting under shading conditions.