Growth analysis of sugarcane inoculated with diazotrophic bacteria and nitrogen fertilization

Pedula, Renan O.; Schultz, Nivaldo; Monteiro, Rafael; Pereira, Willian; Araújo, Adelson Paulo; Urquiaga, Segundo; Reis, Verônica Massena

doi:10.5897/ajar2016.11141

Cited by 24 publications

(5 citation statements)

References 21 publications

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“…RB92579, although there were no differences in chlorophyll compared to control. This increase was also observed by other authors who used the same mixture of diazotrophic bacteria in the variety RB92579 (Pedula et al, 2016).…”

Section: Resultssupporting

confidence: 87%

“…Endophytic diazotrophic bacteria inhabit the interior of sugarcane plants and assist in obtaining nutrients through biological nitrogen fixation and production of phytohormones that modify root architecture, CO 2 assimilation, and leaf number (Fischer et al, 2012). They also act in other processes such as phosphate and zinc solubilization (Estrada et al, 2013), production of auxins, gibberellins, and cytokines (Lin et al, 2012) and protection against pathogens, which result in increased growth and productivity (Pedula et al, 2016;Schultz et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Application of a mixture of five diazotrophs on sugarcane cultivated in the south of Brazil

Matoso¹,

Reis²,

Avancini³

et al. 2020

Agraria

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Sugarcane production in Brazil for the 2019/20 harvest is estimated at approximately 615 million tons. However, in the state of Rio Grande do Sul, it is estimated at only 42.5 thousand tons. It is assumed that the use of diazotrophic bacteria can contribute to the expansion of sugarcane cultivation in the state through increased productivity; hence, this study aimed to evaluate the effects of diazotrophs on the growth of sugarcane. The study was conducted using sugarcane varieties: RB867515, RB92579, RB966928, and RB975932 that were either treated with diazotrophic bacteria or left as a control. The application of diazotrophic bacteria resulted in increased leaf area and stem number in variety RB867515 (cane plant cultivation cycle), and an increase in the relative chlorophyll content of all the varieties of sugarcane except of RB92579. Furthermore, most varieties responded positively in terms of biomass, dry matter, total nitrogen, and soluble solids. These results suggest that the application of diazotrophs assists in the growth and development of sugarcane varieties in Rio Grande do Sul.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Application of a mixture of five diazotrophs on sugarcane cultivated in the south of Brazil

Matoso¹,

Reis²,

Avancini³

et al. 2020

Agraria

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show abstract

“…The most frequently used models for sugarcane are the Logistic and Gompertz models, commonly adjusted for stalk growth (SILVA et al, 2012;BATISTA et al, 2013). Based on these models, plant growth rates can be determined (GAVA et al, 2001;SANTOS et al, 2009;PEDULA et al, 2016), indicating increase in growth over time. These rates help determined the duration of the phenological stages, model curve inflection point (IP), points of maximum acceleration (PMA), minimum deceleration point (PMD), and asymptotic deceleration (PDA).…”

Section: Introductionmentioning

confidence: 99%

Adjusting the growth curve of sugarcane varieties using nonlinear models

et al. 2020

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Assessing sugarcane (Saccharum spp.) stalk growth helps to adequately manage the phenological stages of the crop. The aim of this study was to describe the height-growth curve of four sugarcane varieties (RB92579, RB93509, RB931530 and SP79-1011), in irrigated plant-cane and ratoon cane plantations, using the Logistic and Gompertz nonlinear models, while considering all deviations from assumptions. The model parameters were estimated based on the least squares method using the Gauss-Newton algorithm. To select the most suitable model, nonlinear measures, adjusted coefficient of determination (R2 adj), residual standard deviation (RSD), and corrected Akaike information criterion (AICc) were used. Based on the best models, stalk height growth rates and crop phenological stages were determined using critical points. All tests were performed in the free software environment for statistical computing and graphics, R. In general, the Logistic and Gompertz models without AR(1) better described the plant-cane and ratoon cane stalk height, respectively. All varieties showed early growth, and the RB92579 variety presented higher rates in both cycles.

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“…In the quest to optimize cane production and reduce environmental impacts, an alternative would be the use of bacteria that promote plant growth and fix atmospheric nitrogen (PEDULA et al, 2016;KHAN et al, 2020). With emphasis on the genus Azospirillum, one of the most widely studied and commercially used in agriculture (CASSÁN; DIAZ-ZORITA, 2016;PEDRAZA et al, 2020), including cane (SCHULTZ et al, 2014;TORTORA et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Cultivation of Azospirillum brasilense in Vinasse and Potential Use in Fertigation

Silva

Gasparotto

Lustri

et al. 2020

JAS

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Vinasse, residue from the sugar-energy sector, has been applied as a fertilizer in sugarcane fields due to its nutritional characteristics, which may reduce nitrogen fertilization, especially if associated with diazotrophic bacteria. The objective was to evaluate the use of vinasse as culture medium for Azospirillum brasilense and the chemical changes caused in the residue after bacterial colonization. The experimental design was completely randomized with 9 treatments: T0-control (nutrient broth DYGs inoculated with A. brasilense); T1- 100% vinasse inoculated with A. brasilense; T2- 75% vinasse inoculated with A. brasilense; T3- 25% vinasse inoculated with A. brasilense; T4- 50% vinasse inoculated with A. brasilense; T5- 100% vinasse; T6- 75% vinasse; T7- 25% vinasse and T8- 50% vinasse. Microbial growth was evaluated in a spectrophotometer, by turbidimetry (700nm). Chemical characterization of vinasse was carried out before bacterial inoculation and on days 1, 3, 5 and 7 after inoculation according to the methodologies of the Standard Methods for the Examination of Water and Wastewater 22 ND for the elements nitrogen (4500-Norg), phosphorus (4500-P), potassium (3030-A) and calcium (3500 Ca-B). The determination of organic matter was carried out in accordance with the technical standard NBR 13600. The bacteria A. brasilense survived and multiplied in sugarcane vinasse, causing changes such as the increase in the levels of phosphorus and nitrogen and the reduction of the organic load, mainly in pure vinasse (100%), indicating that the viability of this practice for the application of these organisms in the culture of sugar cane via fertigation.

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Growth analysis of sugarcane inoculated with diazotrophic bacteria and nitrogen fertilization

Cited by 24 publications

References 21 publications

Application of a mixture of five diazotrophs on sugarcane cultivated in the south of Brazil

Application of a mixture of five diazotrophs on sugarcane cultivated in the south of Brazil

Adjusting the growth curve of sugarcane varieties using nonlinear models

Cultivation of Azospirillum brasilense in Vinasse and Potential Use in Fertigation

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