Inoculation with Rhizobium tropici can totally replace N-fertilization in the recently released BRSMG Uai bean cultivar



Título del documento: Inoculation with Rhizobium tropici can totally replace N-fertilization in the recently released BRSMG Uai bean cultivar
Revista: Acta scientiarum. Agronomy
Base de datos: PERIÓDICA
Número de sistema: 000459607
ISSN: 1679-9275
Autores: 1
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2
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Instituciones: 1Universidade Federal de Lavras, Escola de Ciencias Agrarias, Lavras, Minas Gerais. Brasil
2Empresa de Pesquisa Agropecuaria de Minas Gerais, Unidade Sul, Lavras, Minas Gerais. Brasil
3Instituto Federal do Triangulo Mineiro, Setor de Engenharia Agricola, Uberaba, Minas Gerais. Brasil
4Universidade Federal de Lavras, Departamento de Agricultura, Lavras, Minas Gerais. Brasil
Año:
Volumen: 44
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés The BRSMG Uai common bean cultivar (Phaseolus vulgaris L.) unites traits required by producers, such as high yield and upright stands, the latter of which is considerably improved in relation to previously released cultivars such as BRSMG Madrepérola and Pérola. However, the potential of the cultivar to form symbiotic relationships with rhizobia to fix N2 has not yet been assessed. Here, field experiments were conducted to assess the efficiency of biological nitrogen fixation (BNF) in the cultivar, and to compare this to the efficiencies of other genetic materials widely grown throughout Brazil (BRSMG Madrepérola and Pérola). Experiments were conducted on two Oxisols in Minas Gerais State, Brazil (one during the dry season in the south, and the other during the winter season in the Alto-Paranaíba region), under a no-tillage system over maize stover. A randomized block experimental design was implemented in a 3 × 3 factorial arrangement with four replicates. Individual and combined Analysis of Variance were performed and the data were normalized. Homogeneity of the residual mean squares was observed. Significant effects of factors were identified by Scott-Knott tests and F tests. The BRSMG Uai cultivar responded to inoculation with the rhizobial strain CIAT 899, with yields similar to those achieved upon fertilization with 80 kg ha-1 of N-urea and to the yields of the BRSMG Madrepérola and Pérola cultivars inoculated with the same rhizobial strain. In terms of commercial use, this cultivar may be successful under either of the management practices adopted for N supply, and from the perspective of plant breeding, it has potential for inclusion in breeding programs directed toward improving BNF
Disciplinas: Agrociencias,
Biología
Palabras clave: Leguminosas,
Bacterias,
Fertilización,
Frijol,
Phaseolus vulgaris,
Rhizobium tropici,
Nitrógeno
Keyword: Legumes,
Bacteria,
Fertilization,
Bean,
Phaseolus vulgaris,
Rhizobium tropici,
Nitrogen
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