Degradabilidade in situ da cana-de-açúcar tratada ou não com óxido de cálcio, em novilhas leiteiras Holandês x Gir

Campos, M. M.; Borges, A. L. C. C.; Lopes, F. C. F.; Pancoti, Carlos Giovani; Silva, R.R.

doi:10.1590/s0102-09352011000600028

Cited by 20 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results indicate that hydrolysis with CaO did not reach the objective of reducing the fibrous fractions of sugarcane. To reinforce this hypothesis, in a companion study performed concomitantly with the present study, Campos et al (2011) did not observe any effects of the inclusion of 1% or 2% CaO on in situ ruminal degradability of the fibrous fractions (NDF and ADF) of hydrolyzed sugarcane.…”

Section: Resultssupporting

confidence: 78%

Performance of Holstein x Gyr dairy cows fed hydrolyzed sugarcane-based diets

Campos

Borges

Pancoti³

et al. 2019

SCA

View full text Add to dashboard Cite

Twelve multiparous 7/8 Holstein x Gyr dairy cows were fed diets based on chopped sugarcane supplied in natura (control) or after being hydrolyzed (fresh matter basis) for 24 h with 0.5%, 1% or 2% calcium oxide (CaO). The voluntary consumption and digestibility of dietary nutrients, milk production and composition, and feeding behavior of cows were evaluated. A switchback design with three periods, four treatments and three blocks was used. The linear and quadratic effects of the treatments were analyzed using orthogonal contrasts, and the effects were considered significant when P ≤ 0.05. Compared to the that in the control treatment, the Ca concentration increased by 297%, 570% and 1,083% in the diets including sugarcane hydrolyzed with 0.5%, 1% and 2% CaO, respectively, while the respective Ca:P ratios were 6.58:1, 10.70:1 and 19.77:1 (control Ca:P ratio: 1.55:1). The hydrolysis of sugarcane with increasing amounts of CaO promoted a linear reduction (P < 0.01) in the intake of dry matter (DM), nonfibrous carbohydrates, crude protein (CP), organic matter (OM), neutral detergent fiber corrected for ash and protein (NDFap) and ether extract. The intake of total digestible nutrients, acid detergent fiber (ADF), lignin, hemicelluloses and cellulose presented quadratic behavior (P < 0.01) in response to increasing CaO concentrations used for sugarcane hydrolysis. Increases in the amount of CaO used for sugarcane hydrolysis had no effect on the digestibility of NDFap (P > 0.05), but there were linear reductions (P < 0.05) in the digestibility of DM, OM and ADF; the production of milk corrected or not corrected to 4% fat; and the content of protein, lactose and total solids. Linear reductions (P < 0.05) were also observed in the production of all milk components. Only the milk fat content was not altered (P > 0.05) in response to the inclusion of hydrolyzed sugarcane in the diets. There was no effect (P > 0.05) of sugarcane hydrolysis with increasing amounts of CaO on the time the cows spent idle, ruminating and feeding, but there was a linear increase (P < 0.05) in the minutes spent ruminating 1 kg of DM and NDF. Chopped sugarcane hydrolyzed for 24 h with 0.5% to 2.0% CaO should not be used as exclusive roughage in diets for Holstein x Gyr dairy cows with an average milk production of 10 kg day −1 . ResumoDoze vacas multíparas 7/8 Holândês x Gir foram alimentadas com dietas à base de cana de açúcar picada fornecida in natura (controle) ou hidrolisada (base da matéria natural) por 24 h com 0,5%, 1% ou 2% de óxido de cálcio (CaO). O consumo voluntário e a digestibilidade dos nutrientes das dietas, a produção e composição do leite, e o comportamento alimentar das vacas foram avaliados. Um delineamento em switchback com três períodos, quatro tratamentos, e três blocos foi utilizado. Os efeitos linear e quadrático dos tratamentos foram analisados por contrastes ortogonais e diferenças foram consideradas significativas quando P ≤ 0,05. Em comparação ao tratamento controle foram observados aumentos de 297%, 570% e 1.083%, re...

show abstract

Section: Resultssupporting

confidence: 78%

Performance of Holstein x Gyr dairy cows fed hydrolyzed sugarcane-based diets

Campos

Borges

Pancoti³

et al. 2019

SCA

View full text Add to dashboard Cite

show abstract

“…A efi ciência do tratamento com agentes alcalinos foi constatada para cana-de-açúcar tratada com 3% de Ca(OH) 2 (CAMPOS et al, 2011), com aumento na degradação da MS e redução de até 17% no teor de fi bra, e para feno de capim-Tanzânia tratado com 3% de NaOH (SANTOS et al, 2008), com redução de 11% na FDN. Este trabalho foi realizado com o objetivo de avaliar o efeito de tratamentos alcalinos por amonização com ureia e por NaOH e Ca(OH) 2 sobre a composição química e degradação ruminal da MS, PB e FDN do feno de folíolos de pindoba de babaçu.…”

Section: Introductionunclassified

Valor nutritivo do feno de folíolos de pindoba de babaçu submetido a tratamentos alcalinos

et al. 2014

View full text Add to dashboard Cite

show abstract

“…O teor de hemicelulose foi estimado pela diferença entre FDN e FDA. Para avaliação da degradação ruminal, pesou-se 4 g de amostra em sacos de náilon de 12 × 8 cm e porosidade 50 µm de acordo com relação de 42 mg/cm 2 adotada por Campos et al (2011). Os sacos foram inseridos no rúmen de três bovinos adultos, providos de cânula ruminal, por 6, 12, 24, 48, 72 e 96 horas (NCR, 2001) e, após o período de incubação, os sacos foram removidos simultaneamente e imersos em recipiente com água gelada, para cessar o processo de fermentação.…”

Section: Discussionunclassified