Inoculation of Bacillus spp. and nitrogen levels increase chickpea production

• Autor(a) principal: Maria Nilfa Almeida Neta
• Data de Publicação: 2021
• Outros Autores: Elaine Soares de Almeida, Cândido Alves da Costa, Jéssica Aparecida dos Reis Nunes, Luiz Arnaldo Fernandes, Rodinei Facco Pegoraro
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: https://doi.org/10.1590/1413-7054202145015421; http://hdl.handle.net/1843/52218; http://orcid.org/0000-0002-6203-4914; http://orcid.org/0000-0001-5417-3087; http://orcid.org/0000-0002-1859-1422; http://orcid.org/0000-0002-6813-6604; http://orcid.org/0000-0002-9877-1924; http://orcid.org/0000-0002-8692-9296
• topic: Cicer arietinum L.; bactéria promotora de crescimento; rendimento agronômico; Grão-de-bico; Produtividade agrícola; Bacterias

Chickpea growth and yield are related to the balanced supply of N. In weathered soils, this factor depends on the biological activity of growth-promoting bacteria, the presence of diazotrophic bacteria, and the management of nitrogen fertilization. In this regard, this study aimed to evaluate the efficiency of inoculation with a mix of Bacillus spp. and N levels on chickpea cultivation. Two experiments were carried out: area 01, characterized by shortest cultivation time and area 02, with the longest cultivation time. For both studies, the experimental design was in randomized blocks with four replications arranged in a 2 x 6 factorial consisting of the absence or presence of the mix of Bacillus spp. (1 x 107 CFU per mL) from root isolates and six N levels: 0, 25, 50, 75, 100, and 125 kg ha-1. The chickpea production and yield characteristics were evaluated. In the area 01, inoculation with the mix of Bacillus spp. did not interfere with grain yield, whereas the application of lower N levels (25 kg ha-1) increased the dry mass of branches, grains, total dry mass, and yield (4.17 t ha-1). In contrast, in the area 02, nitrogen fertilization increased the chlorophyll index but did not interfere with the remaining production variables, whereas inoculation with Bacillus spp. increased chickpea yield by 4%, resulting in a grain harvest of 4.16 t ha-1. Therefore, inoculation of chickpea seeds with the mix of Bacillus spp. is recommended in soils with long-time cultivation of agricultural species.