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Open AccessArticle

Azospirillum brasilense Can Impressively Improve Growth and Development of Urochloa brizantha under Irrigation

1
Department of Phytosanitary, Rural Engineering and Soils, School of Engineering, São Paulo State University (Unesp), Ilha Solteira, São Paulo 17385-000, Brazil
2
Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
3
Brazilian Agricultural Research Corporation (Embrapa), Jaguariúna, São Paulo 13820-000, Brazil
*
Author to whom correspondence should be addressed.
Agriculture 2020, 10(6), 220; https://doi.org/10.3390/agriculture10060220
Received: 3 May 2020 / Revised: 6 June 2020 / Accepted: 8 June 2020 / Published: 10 June 2020
(This article belongs to the Special Issue Innovative Agronomic Practices for Maximizing Crop Growth and Yield)
Development of strategies to ensure grazing systems are sustainably produced in harsh environments, while not fertilizing them conventionally, is challenging. Figuring out the extent to which dose of inoculation and period of watering can positively influence the establishment of an effective symbiosis between U. brizantha cv. Marandu and Azospirillum brasilense is the point of this research. The treatment consisted of mixing 1 kg seeds with the inoculant of the strains Ab-V5 and Ab-V6 at 5, 10, 20, and 40 mL kg−1, 2 × 108 CFU mL−1. The plants grew in pots watered 2, 4, 8, and 16 days after sowing over thirty-days, twice. The bioagent at 5–10 mL kg−1 enabled the plants watered up to 4 days after sowing to peak the production of dry mass of shoots (28.50 g) and roots (12.55 g). The efficiency of the symbiosis goes down quickly with increasing dose and delay of watering. Hence, if the dose of inoculant is higher than 10 mL kg−1, it cannot successfully act in plants watered at least 8 days after sowing anymore. In conclusion, A. brasilense can assist in U. brizantha cv. Marandu growth and healthy development unless a lack of water in the substrate and an overdose collectively deter its potential. View Full-Text
Keywords: foraging-crop; palisade-grass; plant growth-promoting bacterium; rhizobacterium foraging-crop; palisade-grass; plant growth-promoting bacterium; rhizobacterium
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Almeida Moreira, B.R.; Silva Viana, R.; Lopes Favato, V.; Monteiro de Figueiredo, P.A.; Manzani Lisboa, L.A.; Tadao Miasaki, C.; Chagas Magalhães, A.; Bispo Ramos, S.; Almeida Viana, C.R.; Dias Rezende Trindade, V.; May, A. Azospirillum brasilense Can Impressively Improve Growth and Development of Urochloa brizantha under Irrigation. Agriculture 2020, 10, 220.

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