Mitigation of Mombasa Grass ( Megathyrsus maximus ) Dependence on Nitrogen Fertilization as a Function of Inoculation with Azospirillum brasilense

Leite, Rubson da Costa; Santos, Antônio Clementino dos; Santos, José Geraldo Donizetti dos; Leite, Robson da Costa; Oliveira, Leonardo Bernardes Taverny de; Hungría, Mariangela

doi:10.1590/18069657rbcs20180234

Cited by 46 publications

(26 citation statements)

References 41 publications

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“…in different sites of Brazil and the combination with N-fertilizer (40 kg ha of N) increased biomass production by 15% and of protein by 25% in comparison to the control receiving only N-fertilizer (Hungria et al 2016). Other studies confirmed the good performance of these strains of A. brasilense with brachiarias (Bulegon et al 2016; Guimarães et al 2016; Leite et al 2018a, b), and also with another important pasture in Brazil, panicum Panicum maximum , = Megathyrsus maximus ) (Leite et al 2019). In addition to A. brasilense , positive results were reported for brachiaria inoculated with Bacillus sp.…”

Section: Main Inoculated Cropsmentioning

confidence: 63%

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

2019

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More than one hundred years have passed since the development of the first microbial inoculant for plants. Nowadays, the use of microbial inoculants in agriculture is spread worldwide for different crops and carrying different microorganisms. In the last decades, impressive progress has been achieved in the production, commercialization and use of inoculants. Nowadays, farmers are more receptive to the use of inoculants mainly because high-quality products and multi-purpose elite strains are available at the market, improving yields at low cost in comparison to chemical fertilizers. In the context of a more sustainable agriculture, microbial inoculants also help to mitigate environmental impacts caused by agrochemicals. Challenges rely on the production of microbial inoculants for a broader range of crops, and the expansion of the inoculated area worldwide, in addition to the search for innovative microbial solutions in areas subjected to increasing episodes of environmental stresses. In this review, we explore the world market for inoculants, showing which bacteria are prominent as inoculants in different countries, and we discuss the main research strategies that might contribute to improve the use of microbial inoculants in agriculture.

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Section: Main Inoculated Cropsmentioning

confidence: 63%

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

2019

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“…B.K.Simon & Jacobs (syn. Panicum maximum) genotypes Zuri Guinea (Sá et al 2019b) and Mombassa (Leite et al 2019a). However, the great majority of the pastures in Brazil and worldwide is already established, and nothing is known on the feasibility of inoculation of PGPB to boost plant growth and forage biomass production under these conditions.…”

Section: Introductionmentioning

confidence: 99%

Seed and leaf-spray inoculation of PGPR in brachiarias (Urochloa spp.) as an economic and environmental opportunity to improve plant growth, forage yield and nutrient status

et al. 2021

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Purpose Brazil has 180 Mha of pastures, 86 Mha occupied with Urochloa spp. (syn. Brachiaria), and 70% in some level of degradation. Inoculation with plant-growth-promoting bacteria (PGPR) may represent an economic and environmental feasible strategy to improve pasture production. Methods Two greenhouse and seven field trials were performed to verify the effects of seed inoculation at sowing or leaf-spray inoculation in established pastures of Urochloa with elite strains of Azospirillum brasilense and Pseudomonas fluorescens. All plants received nutrients including 40 kg ha−1 of N at sowing, and half of the treatments a supply of 40 kg ha−1 of N 30 days after emergence. Results A. brasilense increased shoot biomass by an average of 16.8% with both seed and leaf-spray inoculation, whereas P. fluorescens increased by 15.2 and 14.2%, respectively, always higher with the extra supply of N. Seed and leaf-spray inoculation with A. brasilense increased N content by an average of 11.7 and 20.7%, and K by 9.9 and 11.3%, respectively; for P. fluorescens average increases were of 33.3 and 36.6% for P, and of 10.6 and 13.6% for K, respectively. Benefits were mainly attributed to improvements in root architecture by the synthesis of phytohormones. Biological nitrogen fixation in A. brasilense, P acquisition (solubilization of phosphates and siderophores synthesis) and ACC-deaminase in P. fluorescens also contributed to plant growth and nutrient status. Conclusion Inoculation with elite PGPR strains translated into more fodder and improved nutritional value of feed for livestock, representing a promising and environmentally-friendly strategy for tropical pastures.

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“…Similar results were reported by [9] in M. maximus cv. BRS Zuri, in this same dose of N, and by [41], in M. maximus cv. Mombasa, with A. brasilense Ab-V5 + Ab-V6, regardless of the associated N dose.…”

Section: Nutritional Value Of Mavuno Grass Crude Protein (Cp) In the mentioning

confidence: 94%

Inoculation with plant growth-promoting bacteria and reduction of nitrogen fertilizer in herbage accumulation and nutritional value of Mavuno grass

Duarte

Filho

et al. 2021

Int J Innov Educ Res

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Strategies that improve the use of nitrogen (N), by tropical forage grasses, can bring environmental and social gains. Thus, this study aimed to evaluate the forage productivity and the nutritional value (NV) of the hybrid Urochloa spp. cv. ´Mavuno`, under inoculation with plant growth-promoting bacteria (PGPB) and doses of N. The experiment was carried out in the field, for a period of 14 months, in a randomized block design, with nine treatments and four replications in plots of 9 m². Seed inoculations were tested with: Azospirillum brasilense Ab-V5 and Ab-V6 strains; Pseudomonas fluorescens CCTB 03 and co-inoculation with Rhizobium tropici CIAT 899 and A. brasilense Ab-V6, combined with 50 and 100 kg ha-1 of added mineral N; fertilization with N-mineral with these doses, without inoculation and the control treatment, without N and without inoculation. The bacteria were inoculated to the grass seeds. The forage was evaluated by determining the shoot dry weight yield (SDWY) and the levels of crude protein (CP), neutral detergent insoluble fiber (NDF), acid detergent insoluble fiber (ADF) and in vitro dry matter digestibility (IVDMD). The results were subjected to analysis of variance by the F test (p ≤ 0.05) and compared to each other by the Scott-Knott test at 5% probability. Inoculation with PGPB resulted in greater SDWY when associated with a dose of 50 kg ha-1 of N. In plants inoculated with A. brasilense Ab-V5 + Ab-V6 and P. fluorescens CCTB 03, associated with a dose of 50 kg ha-1 of N-mineral, SDWY was similar to that obtained with double the dose of N in the absence of inoculation. The inoculation with PGPB resulted in an increase in the NV of Mavuno grass, with emphasis on A. brasilense Ab-V5 + Ab-V6 and P. fluorescens CCTB 03, associated with the dose of 100 kg ha-1 of N-mineral that improved the nutritional value in all evaluated items. The inoculation with A. brasilense Ab-V5 + Ab-V6 was the most promising, followed by P. fluorescens CCTB 03, mainly in association with 50 kg ha-1 of N.

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Mitigation of Mombasa Grass ( Megathyrsus maximus ) Dependence on Nitrogen Fertilization as a Function of Inoculation with Azospirillum brasilense

Cited by 46 publications

References 41 publications

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

Microbial inoculants: reviewing the past, discussing the present and previewing an outstanding future for the use of beneficial bacteria in agriculture

Seed and leaf-spray inoculation of PGPR in brachiarias (Urochloa spp.) as an economic and environmental opportunity to improve plant growth, forage yield and nutrient status

Inoculation with plant growth-promoting bacteria and reduction of nitrogen fertilizer in herbage accumulation and nutritional value of Mavuno grass

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