Degradação in vitro da fibra em detergente neutro de forragem tropical de baixa qualidade em função de suplementação com proteína e/ou carboidratos

Costa, V.; Detmann, Edênio; Filho, Sebastião de Campos Valadares; Paulino, Mário Fonseca; Henriques, Lara Toledo; Mantovani, Hilário Cuquetto

doi:10.1590/s1516-35982008000300015

Cited by 36 publications

(38 citation statements)

References 26 publications

(20 reference statements)

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“…Costa et al (2008) noted average increase of 22.4% in the microbial increase on the fiber carbohydrates of the low quality forage according to nitrogen compounds of the supplementation.…”

Section: Resultsmentioning

confidence: 89%

“…Despite of the fact that both energetic and protein substrate can be introduced in the system through supplementation, most of the energetic substrates related to neutral detergent fiber potentially digestible are not used because of deficiency of microbial enzymatic systems in the ruminal environment . So, primordial supplementation with nitrogen compounds increase microbial activity by providing increase of intake and extraction of energy from forage (NDFpd fraction), as a response to the stimulus verified on rate and extension of NDFpd degradation, with a consequent reduction of ruminal fullness effect (Costa et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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-The objective of this work was to evaluate the effect of using multiple supplements with different levels of cottonseed meal 38% on intake, total apparent digestibility of dietary components, efficiency of microbial synthesis and productive performance of beef heifers in Brachiaria decumbens pasture during the rainy season. It was used 25 Nellore heifers and 10 crossbred heifers with predominance of Zebu breed at 16 months of age and with 249.8 ± 0.6 kg of body weight. It was used a complete random experimental design with five treatments and seven replicates. Supplements contained approximately 30% of crude protein (CP) and soybean meal replaced by cottonseed meal 38% at the levels 0; 33; 67 and 100%, (CS 0 , CS 33 , CS 67 and CS 100 , respectively) evaluated in relation to a control group, which received only mineral mixture (MM) ad libitum.Daily weight gain was 397, 546, 570, 525 and 542 g, respectively, for the groups MM, CS 0 , CS 33 , CS 67 and CS 100 . There was no effect of the levels of cottonseed meal 38% on daily weight gain, which differed among animals fed supplement and control group, however. Intakes of crude protein and non-fibrous carbohydrates (NFC) in kg/day were greater in groups under supplementation. Coefficients of total apparent digestibility of CP and NFC were greater in animals fed supplements in relation to the control group. Increase on the replacement level of soybean meal by cottonseed meal had a positive linear effect on coefficients of total apparent digestibility of DM, organic matter and CP. There was no difference on microbial efficiency, expressed as g of crude protein per kg of TDN consumed by the animals under supplements and the ones of the control group, neither it was observed difference among levels of replacement of soybean meal by cottonseed meal. The use of cottonseed meal 38% replacing soybean meal in the diet does not harm performance of grazing beef heifers.

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“…Costa et al (2008) noted average increase of 22.4% in the microbial increase on the fiber carbohydrates of the low quality forage according to nitrogen compounds of the supplementation.…”

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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show abstract

“…These effects result from improvement in the rate and extension of pdNDF degradation, and decrease in the rumen fill effect (Costa et al, 2008). Nevertheless, it is necessary to define an equilibrium point between nitrogenous compounds supplementation and optimal pdNDF use (Paulino et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Intake and digestibility in cattle fed low-quality tropical forage and supplemented with nitrogenous compounds

et al. 2009

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-The objective of this study was to evaluate the effects of supplementation with nitrogenous compounds on intake, digestibility, and rumen microbial synthesis in cattle fed low-quality tropical forage. Five crossbred heifers, averaging 209 kg and fitted with ruminal fistulla, were used. The animals were fed ad libitum with signal grass (Brachiaria decumbens Stapf.) hay, which had crude protein (CP) content of 5.08%, as dry matter (DM) basis. The five treatments were defined according to the increasing level of CP in the diet (0, 3, 5, 7, and 9 percentile points above the forage CP level). The supplement consisted of the following nitrogen sources: urea, ammonium sulfate and albumin (4.5:0.5:1.0, respectively). The experiment was carried out according to a 5 × 5 Latin square design, with five experimental periods. The average CP levels in the diets were: 5. 28, 8.08, 9.82, 11.87, and 13.63% on DM basis. The intakes of DM, organic matter (OM), and neutral detergent fiber (NDF) showed a quadratic response according to CP levels in the diet, with maximum responses at 10.83%, 10.78%, and 10.37% CP, respectively. The digestibility coefficients of OM and NDF showed a linear-response-plateau response according to CP levels, with the plateau beginning (maximum response) at 7.93% and 7.55% CP, respectively. The average daily concentration of rumen ammonia nitrogen (RAN) was positively related with CP levels. The RAN estimate associated with the maximum DM intake was 15.33 mg/dL. It was observed that intestinal flow of microbial nitrogenous compounds and nitrogen intake became equivalent to each other at 7.13% of CP. 8,08; 9,82; 11,87 e 13,63%, com base na matéria seca (MS). Verificou-se efeito quadrático dos níveis de PB na dieta sobre os consumos de MS, matéria orgânica (MO) e fibra em detergente neutro (FDN) (kg/dia), com respostas máximas nos níveis de 10,83%, 10,78% e 10,37% de PB, respectivamente.

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“…Nevertheless, in all byproducts assessed the p parameter tended towards c, so it was necessary to reparametrize the model by applying L'Hôpital's rule, as follows: whose mathematical interpretation is λ = c = p and corresponds to the degradation rate when p tends to c. Because the parameter λ jointly represents the rates of degradation and latency, a direct biological comparison with c parameter is impossible (Costa et al, 2008). In this way, we estimated the fractional rate of degradation from λ, using the properties of the gamma-2 distribution (Ellis et al, 1994): c´ = 0.59635 × λ where: c´= fractional rate of degradation of potentially degradable NDF (h -1 ).…”

Section: Methodsmentioning

confidence: 99%

Degradation kinetics and assessment of the prediction equation of indigestible fraction of neutral detergent fiber from agroindustrial byproducts

et al. 2011

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-This study aimed at estimating the kinetic parameters of ruminal degradation of neutral detergent fiber from agroindustrial byproducts of cashew (pulp and cashew nut), passion fruit, melon, pineapple, West Indian cherry, grape, annatto and coconut through the gravimetric technique of nylon bag, and to evaluate the prediction equation of indigestible fraction of neutral detergent fiber suggested by the Cornell Net Carbohydrate and Protein System. Samples of feed crushed to 2 mm were placed in 7 × 14 cm nylon bags with porosity of 50 μm in a ratio of 20 g DM/cm² and incubated in duplicate in the rumen of a heifer at 0, 3, 6, 9, 12, 16, 24, 36, 48, 72, 96 and 144 hours. The incubation residues were analyzed for NDF content and evaluated by a non-linear logistic model. The evaluation process of predicting the indigestible fraction of NDF

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Degradação in vitro da fibra em detergente neutro de forragem tropical de baixa qualidade em função de suplementação com proteína e/ou carboidratos

Cited by 36 publications

References 26 publications

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Intake and digestibility in cattle fed low-quality tropical forage and supplemented with nitrogenous compounds

Degradation kinetics and assessment of the prediction equation of indigestible fraction of neutral detergent fiber from agroindustrial byproducts

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