Desempenho de novilhos recebendo dietas à base de cana-de-açúcar in natura ou hidrolisada

Freitas, Acyr Wanderley de Paula; Rocha, Fernanda Cipriano; Zonta, Augusto; Fagundes, Jaílson Lara; Fonseca, Ricardo da; Zonta, Mauro

doi:10.1590/s1516-35982011001100035

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…No Brasil, a produção da cana-de-açúcar é destinada, principalmente, à indústria sucroalcooleira. No entanto, Landell et al (2002) e Freitas et al (2011) estimam que 10% de sua produção são utilizadas na alimentação de ruminantes.…”

Section: Introductionunclassified

Produção e composição química de variedades de cana-de-açúcar com fins forrageiros sob irrigação e adubação

Magalhães

Rodrigues

Santos

et al. 2018

Pubvet

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Objetivou-se avaliar os efeitos de variedades, da irrigação e da adubação sobre a produção e composição química da cana-de-açúcar com fins forrageiros em Parnaíba, Piauí. O delineamento experimental foi em blocos casualizados, em esquema fatorial 2 x 5 x 4, com quatro repetições. Os tratamentos consistiram em duas lâminas de irrigação (reposição de 50% e 100% da evapotranspiração de referência -ETo), cinco variedades de cana-de-açúcar (RB962962, RB867515, RB92579, RB863129 e RB98710) e quatro níveis de adubação (70 + 63; 140 + 126; 210 + 189 e 280 + 252 kg de N + K 2 O/ha/ano, respectivamente). O plantio foi realizado em julho de 2015 e a colheita em julho de 2016. As variedades de cana-de-açúcar RB962962 e RB867515 se sobressaíram das demais, apresentando elevada produtividade de biomassa e maiores percentuais de colmos, conciliada a satisfatórios teores de sólidos solúveis (açúcares). Para as condições do norte do Piauí, considerando-se a produtividade, melhoria da composição química e a possibilidade de economia de água, a lâmina de água aplicada (lâmina de irrigação + 1.696 mm de precipitação pluviométrica), associada à aplicação de 70 kg de N e 63 kg de K 2 O/ha/ano, pode ser utilizada na produção de biomassa da cana-de-açúcar com fins forrageiros.

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Section: Introductionunclassified

Produção e composição química de variedades de cana-de-açúcar com fins forrageiros sob irrigação e adubação

Magalhães

Rodrigues

Santos

et al. 2018

Pubvet

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“…The effect of alkalinizing agents, such as sodium hydroxide (NaOH), calcium hydroxide (Ca(OH) 2 ) and, more recently, calcium oxide (CaO), on the digestibility of the fibrous fraction of sugarcane has been evaluated in studies conducted in vitro (MOTA et al, 2010;DOMINGUES et al, 2015) and in vivo in cattle (EZEQUIEL et al, 2005;MORAES et al, 2008;PINA et al, 2010;CAMPOS et al, 2011;FREITAS et al, 2011;PINA et al, 2011;MISSIO et al, 2012;DANIEL et al, 2013). In theory, these alkalis promote the breakdown of the cell wall and the partial solubilization of the hemicelluloses, lignin and silica, through the hydrolysis of uronic esters and acetic acid and the swelling of cellulose (JACKSON, 1977).…”

Section: Introductionmentioning

confidence: 99%

Rumen parameters and passage rate in cattle fed diets based on sugarcane hydrolyzed with calcium oxide

Lopes

Campos

Borges

et al. 2018

SCA

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Nine non-lactating Holstein x Gyr cattle were fed with rations based on chopped sugarcane supplied in natura (control) or hydrolyzed (fresh matter basis) for 24 h with 1% or 2% calcium oxide (CaO), which corresponds to 3.1% or 6.2% CaO on a dry matter (DM) basis, respectively. Ruminal parameters (pH and ammonia N, acetate, propionate and butyrate concentrations) as well as the kinetics of fluid and particulate passage in the gastrointestinal tract from cattle were evaluated. A design using three 3 x 3 contemporaneous Latin Squares (LS) was adopted. The studies of kinetics of fluid and particulate passage were performed using the external markers cobalt-EDTA and chromium-mordanted-NDF, respectively. The ruminal parameters were analyzed according to a 3 x 3 LS replicated three times with repeated measures in time using mixed models that included the fixed effects of treatment (level of CaO), time of sampling and their interaction and the following random effects: LS, animal(LS), period of LS and period*animal (LS). The kinetic parameters of fluid and particulate passage were analyzed using mixed models with treatment as a fixed effect and period of LS, animal(LS) and LS as random effects. The linear and quadratic effects of the treatments were analyzed using orthogonal contrasts. Significant differences were declared at P ? 0.05. No treatment*time interaction was observed (P > 0.05) for any ruminal parameter. A linear effect (P = 0.0279) of CaO inclusion on ruminal pH was observed, but there were no effects (P > 0.05) of the treatments on the ammonia N, acetate, butyrate and total volatile fatty acid ruminal concentrations. There was a quadratic effect (P = 0.05) of the addition of CaO on the ruminal propionate concentration. There was no effect (P > 0.05) of the treatments on the particulate rate of passage in the rumen as well as on the mean retention time in this compartment and in the total gastrointestinal tract. On the other hand, the addition of CaO to sugarcane promoted a linear increase (P = 0.0258) in the particulate post-ruminal passage rate and, consequently, a linear reduction (P = 0.0363) of the mean retention time in the cecum-proximal colon. There was no effect (P > 0.05) of the sugarcane hydrolysis with CaO on the ruminal parameters of the kinetics of fluid passage (dilution rate, retention time and turnover rate). The addition of 3.1% or 6.2% CaO on a DM basis (1% or 2% CaO on a fresh matter basis, respectively) of sugarcane does not improve ruminal fermentation, nor does it increase the fluid or particulate passage in the rumen of non-lactating Holstein x Gyr cattle.

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Chemical composition and in situ degradability of sugarcane tip hay subjected to alkaline treatment

Franco

Garcez

Alves

et al. 2022

An. Acad. Bras. Ciênc.

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The present study aimed to evaluate the effect of alkaline treatments with urea, NaOH and Ca(OH) 2 on chemical composition and in situ ruminal degradability of dry matter, crud protein and neutral detergent fi ber of sugarcane tip hay. Samples were incubated in the rumen of three cannulated cattle for up to 72 hours in a split plot randomized block design. Ammoniation with 6% urea increased (p<0.05) the crude protein content by 13% and reduced the neutral detergent fi ber and insoluble nitrogen content of the hay. When treated with the highest doses of the compounds, there was a high potential degradability of dry matter, crude protein and neutral detergent fi ber, and a shorter neutral detergent fi ber lag time. Ammoniation with urea promotes a reduction in the content of NDF, hemicellulose and insoluble nitrogen, with an increase in the content of CP in the hay, with emphasis for the level of 6% urea. The ruminal degradation of sugarcane tip hay increases with alkaline treatments using 6% urea or 3% NaOH, however, ammoniation with urea is indicated for the treatment of hay, as this is low cost and can be easily adopted by farmers in the semiarid region.

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Desempenho de novilhos recebendo dietas à base de cana-de-açúcar in natura ou hidrolisada

Cited by 5 publications

References 7 publications

Produção e composição química de variedades de cana-de-açúcar com fins forrageiros sob irrigação e adubação

Produção e composição química de variedades de cana-de-açúcar com fins forrageiros sob irrigação e adubação

Rumen parameters and passage rate in cattle fed diets based on sugarcane hydrolyzed with calcium oxide

Chemical composition and in situ degradability of sugarcane tip hay subjected to alkaline treatment

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