Características produtivas e nutricionais do capim-xaraés inoculado com bactérias diazotróficas associativas

Bosa, Chistiane Kamila; Guimarães, Salomão Lima; Polizel, Analy Castilho; Bonfim-Silva, Edna Maria; Canuto, Erineudo Lima

doi:10.1590/1678-4162-8290

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The reduction in CP content as a function of age may be related to the increase of the cellular appearance constituents, proportionally diluting the components present in the cellular content, a fact also observed by Bosa, Guimarães, Polizel, Bonfim-Silva and Canuto (2016) and Monção et al (2016). The CP content of 8.8% at the 49 days of regrowth verified in this research is satisfactory according to Van Soest (1994), who showed that the dry matter intake of tropical forages is positively influenced by the protein content of the plants, when this parameter is above 7%.…”

Section: Resultsmentioning

confidence: 67%

<b>Hay Tifton 85 grass under nitrogen doses in different days of regrowth

Andrade

Sales

Monção

et al. 2018

Acta Sci. Anim. Sci.

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The objective of this study was to evaluate the yield, nutritional value and potential ruminal degradation of Tifton 85 hay (Cynodon spp.) harvested at four regrowth ages (28, 35, 42 and 49 days) and fertilized with two nitrogen doses (N; 100 and 300 kg N ha-1). The experimental design was a randomized block design, arranged in a 4 x 2 factorial scheme, with six replications each. Nitrogen fertilization increased (p < 0.05) dry matter yield and digestible dry matter production of hay and also lignin and crude protein contents. Nitrogen fertilization increased (p < 0.01) the dry matter yield and the digestible dry matter production of hay, as well as lignin (p = 0.01) and crude protein (p = 0.01). The neutral detergent fiber corrected for ash and protein (p = 0.01), acid detergent fiber (p = 0.01) and cellulose (p = 0.02) adjusted to the quadratic function regression model of the regrowth ages. For potential rumen degradability hay, it was observed quadratic effect (p = 0.01) with maximum value of 73.1% at 37 days of regrowth. Tifton 85 hay fertilized with 300 kg ha -1 of N and harvested up to 37 days of regrowth results in higher hay dry matter yield, higher crude protein content, and better dry matter rumen degradability.

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Section: Resultsmentioning

confidence: 67%

<b>Hay Tifton 85 grass under nitrogen doses in different days of regrowth

Andrade

Sales

Monção

et al. 2018

Acta Sci. Anim. Sci.

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“…Biological nitrogen fixation (BNF) is performed through the nitrogenase enzyme present exclusively in diazotrophic bacteria, transforming N2 into ammonia (Moreira & Siqueira, 2006). They also reduce the need for chemical fertilizers (Bosa et al, 2016).…”

Section: Biological Nitrogen Fixationmentioning

confidence: 99%

Microbial Activity in the Agricultural and Forestry System

Oliveira

Rocha

Teles

et al. 2022

RSD

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Soil quality is directly related to the diversity and density of microorganisms present in it, as they perform important functions that promote the growth of plant species, maintaining soil sustainability and favoring increased agricultural production and environmental regeneration. With this, the objective was to describe and relate the functions of microorganisms existing in the soil and their action potentials in agricultural and forestry species. Some species of fungi and bacteria are able to solubilize phosphorus from phosphate sources, releasing it to be absorbed by plant roots, resulting in gains in crop productivity. Other species of bacteria, when inoculated to seeds, besides stimulating the growth and development of plants, act as biofertilizers by fixing nitrogen from the air (N2). Mycorrhizae constitute a specialized symbiotic association between roots and some soil fungi in which fungal hyphae absorb nutrients from the soil solution and transport them to plants. The inoculation of plant species with microorganisms that help in the availability of phosphorus, due to its low concentration in soils, becomes essential in supplying the nutritional demands of plants and arbuscular mycorrhizal fungi (AMF) and phosphate solubilizing bacteria are among microorganisms that can perform this function. In relation to the main forest species cultivated in Brazil, all have the potential to benefit from associations with microorganisms, hence the importance of knowing, researching and stimulating the increase of the microbial quality of the soil.

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“…However, the density and diversity of these microorganisms in the soil is influenced both by edaphoclimatic conditions and vegetation type (VITORAZI FILHO et al, 2012). Studies by Guimarães et al (2011) and Bolsa et al (2016) report the potential contribution of inoculation with some bacterial strains to the development of Brachiaria spp. Still, studies of inoculation with nitrogen-fixing bacteria in forage grasses are incipient, requiring in vitro research studies to identify desirable physiological properties in bacterial strains that could potentially promote grass growth and soil enrichment with a great success when applied in the field.…”

Section: Introductionmentioning

confidence: 99%

PHYSIOLOGICAL CHARACTERIZATION OF DIAZOTROPHIC BACTERIA ISOLATED FROM Brachiaria brizantha RHIZOSPHERE

et al. 2019

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The objective of this study was to evaluate the ability of diazotrophic bacteria isolated from Brachiaria brizantha rhizosphere to grow at different pH values and salt concentrations, to produce indoleacetic acid (IAA), and to solubilize phosphate. Both acidity and salinity tolerance tests were performed on modified solid FAM medium. Acidity resistance tests were performed at pH values of 4.0, 5.0, 6.0, and 7.0, while, salt resistance was evaluated at concentrations of 0.01, 5.02, 9.99, 14.96, 19.98, 24.95, 29.98, 34.94, 39.97, 44.94, and 49.96 gL-1 NaCl. For the IAA production assay, bacterial strains were cultivated in liquid DYGS medium both in the absence and presence of tryptophan (Trp). In addition, phosphorus solubilization assay was performed in GL liquid medium. All strains grew at every pH value tested, and a high diversity was observed after salt resistance, IAA production, and phosphate solubilization testing. Strains UNIFENAS 100-51, UNIFENAS 100-52, UNIFENAS 100-60, UNIFENAS 100-63, and UNIFENAS 100-65 were those with the best growth at the highest salt concentrations. Furthermore, in the presence of Trp, strains UNIFENAS 100-63 and UNIFENAS 100-69 were the ones with the highest IAA production. Strain UNIFENAS 100-52 showed the best response to the in vitro phosphate solubilization assay. Based on these results, it can be seen that studies related to the physiological and metabolic characteristics of diazotrophic bacterial strains are important to ensure greater success in the field.

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Características produtivas e nutricionais do capim-xaraés inoculado com bactérias diazotróficas associativas

Cited by 5 publications

References 13 publications

<b>Hay Tifton 85 grass under nitrogen doses in different days of regrowth

<b>Hay Tifton 85 grass under nitrogen doses in different days of regrowth

Microbial Activity in the Agricultural and Forestry System

PHYSIOLOGICAL CHARACTERIZATION OF DIAZOTROPHIC BACTERIA ISOLATED FROM Brachiaria brizantha RHIZOSPHERE

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