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

Bruno Rafael de Almeida Moreira, Ronaldo da Silva Viana, Vinícius Lopes Favato, Paulo Alexandre Monteiro de Figueiredo, Lucas Aparecido Manzani Lisboa, Celso Tadao Miasaki, Anderson Chagas Magalhães, Sérgio Bispo Ramos, Charlene Raquel de Almeida Viana, Vanessa Dias Rezende Trindade and André May
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Bruno Rafael de Almeida Moreira: Department of Phytosanitary, Rural Engineering and Soils, School of Engineering, São Paulo State University (Unesp), Ilha Solteira, São Paulo 17385-000, Brazil
Ronaldo da Silva Viana: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Vinícius Lopes Favato: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Paulo Alexandre Monteiro de Figueiredo: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Lucas Aparecido Manzani Lisboa: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Celso Tadao Miasaki: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Anderson Chagas Magalhães: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Sérgio Bispo Ramos: Department of Plant Production, College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 17900-000, Brazil
Charlene Raquel de Almeida Viana: Department of Phytosanitary, Rural Engineering and Soils, School of Engineering, São Paulo State University (Unesp), Ilha Solteira, São Paulo 17385-000, Brazil
Vanessa Dias Rezende Trindade: Department of Phytosanitary, Rural Engineering and Soils, School of Engineering, São Paulo State University (Unesp), Ilha Solteira, São Paulo 17385-000, Brazil
André May: Brazilian Agricultural Research Corporation (Embrapa), Jaguariúna, São Paulo 13820-000, Brazil

Agriculture, 2020, vol. 10, issue 6, 1-13

Abstract: 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 × 10 8 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.

Keywords: foraging-crop; palisade-grass; plant growth-promoting bacterium; rhizobacterium (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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