RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES

Fernandes de Brito L, Pacheco RS, de Souza Filho BF, de Brito Ferreira EP, Straliotto R, Araujo AP (2015)
Revista Brasileira de Ciência do Solo 39(4): 981-992.

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Abstract
Common bean (Phaseolus vulgaris L.) may benefit from biological N-2 fixation, but inconsistent responses of the crop to rhizobium inoculation indicate the need for supplemental mineral N fertilization. In this study, we aimed to evaluate the response of the common bean crop to rhizobium inoculation in association with supplemental mineral N in the Cerrado (Brazilian tropical savanna) and Atlantic Forest biomes. Four field experiments were carried out, two in Santo Antonio de Goias (State of Goias), one in Valenca (State of Rio de Janeiro), and another in Macae (State of Rio de Janeiro), all in Brazil. Inoculation with commercial rhizobium strains was compared to inoculation with strain BR 923 of Sinorhizobium sp., to mineral N fertilization, and to supplementation with N at sowing and in topdressing. Evaluation of the native rhizobium population indicated 105 cells g(-1) in the soil of the experimental area in Goias, previously cultivated with common bean, and 102 cells g(-1) in the soil in Valenca, previously kept in pasture. In both experiments in Goias, grain yields of around 2,100 kg ha(-1) did not differ among the control treatments, rhizobia inoculation, or the application of 120 kg ha(-1) of N. In Valenca, inoculation with commercial strains provided yields from the cultivar Ouro Negro higher than the absolute control, in the lack of topdressing N fertilization. With 40 kg ha(-1) of N in topdressing, rhizobium inoculation led to 3,420 kg ha(-1) of grain yield, higher than the other treatments. In the mean of different N sources at sowing, topdressing fertilization increased grain yield from 2,367 to 2,542 kg ha(-1). In Macae, in a soil with high organic matter content, the highest yields were obtained with inoculation of commercial strains associated with 40 kg ha(-1) of N in topdressing, and there were deleterious effects from application of 80 kg ha(-1) of N at sowing. We conclude that in areas without a previous common bean crop, inoculation with commercial rhizobium strains increases grain yield, particularly when associated with topdressing N fertilization.
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Fernandes de Brito L, Pacheco RS, de Souza Filho BF, de Brito Ferreira EP, Straliotto R, Araujo AP. RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES. Revista Brasileira de Ciência do Solo. 2015;39(4):981-992.
Fernandes de Brito, L., Pacheco, R. S., de Souza Filho, B. F., de Brito Ferreira, E. P., Straliotto, R., & Araujo, A. P. (2015). RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES. Revista Brasileira de Ciência do Solo, 39(4), 981-992.
Fernandes de Brito, L., Pacheco, R. S., de Souza Filho, B. F., de Brito Ferreira, E. P., Straliotto, R., and Araujo, A. P. (2015). RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES. Revista Brasileira de Ciência do Solo 39, 981-992.
Fernandes de Brito, L., et al., 2015. RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES. Revista Brasileira de Ciência do Solo, 39(4), p 981-992.
L. Fernandes de Brito, et al., “RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES”, Revista Brasileira de Ciência do Solo, vol. 39, 2015, pp. 981-992.
Fernandes de Brito, L., Pacheco, R.S., de Souza Filho, B.F., de Brito Ferreira, E.P., Straliotto, R., Araujo, A.P.: RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES. Revista Brasileira de Ciência do Solo. 39, 981-992 (2015).
Fernandes de Brito, Luciana, Pacheco, Rafael Sanches, de Souza Filho, Benedito Fernandes, de Brito Ferreira, Enderson Petronio, Straliotto, Rosangela, and Araujo, Adelson Paulo. “RESPONSE OF COMMON BEAN TO RHIZOBIUM INOCULATION AND SUPPLEMENTAL MINERAL NITROGEN IN TWO BRAZILIAN BIOMES”. Revista Brasileira de Ciência do Solo 39.4 (2015): 981-992.
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