Título:	New rhizobia strains isolated from the Amazon region fix atmospheric nitrogen in symbiosis with cowpea and increase its yield
Autor(es):	Ferreira, Paulo Ademar Avelar Pereira, João Paulo Andrade Resende Oliveira, Dâmiany Pádua Vale, Helson Mário Martins do Jesus, Ederson da Conceição Soares, André Luis de Lima Nogueira, Cláudia de Oliveira Gonçalves Andrade, Messias José Bastos de Moreira, Fátima Maria de Souza
ORCID:	http://orcid.org/0000-0002-5622-6303 http://orcid.org/0000-0002-9852-3939 http://orcid.org/0000-0002-1817-4020 http://orcid.org/0000-0002-5452-3873 http://orcid.org/0000-0002-2687-8976 http://orcid.org/0000-0001-8244-0912 http://orcid.org/0000-0002-1812-3645 http://orcid.org/0000-0001-7056-2349 http://orcid.org/0000-0003-0159-5811
Assunto:	Feijão-de-corda Nitrogênio Inoculação artificial Nitrogênio - fixação
Data de publicação:	2019
Editora:	Instituto Agronômico de Campinas
Referência:	FERREIRA, Paulo Ademar Avelar et al. New rhizobia strains isolated from the Amazon region fix atmospheric nitrogen in symbiosis with cowpea and increase its yield. Bragantia, Campinas, v. 78, n. 1, p. 38-42, 2019. DOI:https://doi.org/10.1590/1678-4499.2018053. Disponível em: http://scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100038. Acesso em: 23 jan.2020.
Abstract:	Studies in the Amazon indicate a wide diversity of rhizobia with the ability for biological nitrogen fixation (BNF), which could expand the number of strains approved for cowpea. Thus, the aim of this field study was to evaluate the agronomic performance in cowpea of the several strains isolated from the soils of the Brazilian states Acre and Rondônia, and to compare them withstrains approved by the Ministry of Agriculture (MAPA) and withnon-inoculated controls (without and with mineral nitrogen fertilizer). The inoculants performed well. Though less effective than the other strains, the UFLA 03-36 strain also was prominent with respect to grain yield. Because of the positive response of the UFLA 03-129 strain, which led to yield increases greater than the obtained from the control without inoculation plus mineral-N, it can be recommended as an inoculum for cowpea. Further investigations should be carried out to obtain MAPA’s approval for their use. Other experiments involving this strain and several cultivars are being carried out on other types of soil and environmental conditions of the state of Minas Gerais.
Licença:	(CC BY)
DOI:	https://doi.org/10.1590/1678-4499.2018053
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