Consequences of underfeeding on digestion and absorption in sheep

Doreau, M.; Michalet-Doreau, B.; Grimaud, Patrice; Atti, Naziha; Nozière, Pierre

doi:10.1016/s0921-4488(03)00145-7

Cited by 48 publications

(49 citation statements)

References 62 publications

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“…Our results did not indicate the negative relationship between intake and digestibility reported previously (Colucci et al, 1990), presumably because the negative relationship between these variables has been established in experiments conducted at levels of intake above maintenance (Doreau et al, 2003). Conversely, the lack of intake level effects on digestibility was also observed in other studies (Puchala et al, 2005;Tovar-Luna et al, 2011), in goats fed near maintenance.…”

Section: Discussioncontrasting

confidence: 85%

“…However, energy loss in methane proportional to OM intake was similar among levels of feed restriction; consequently, dietary metabolizability (q) did not differ among treatments either. A previous study pointed out that, during periods of feed restriction, animals experience metabolic and ruminal environmental changes to offset the low feed allowance (Doreau et al, 2003), which may impact their performance. Nonethless, the high-quality diet offered to animals in this Table 2 -Intake, digestibility, methane emission, and energy balance of goats subjected to feed restriction BW -body weight; OM -organic matter; ME -metabolizable energy; DE -digestible energy; q -metabolizability; L -ratio between ME intake and ME required for maintenance (462 kJ/kg 0.75 BW; NRC, 2007); ME/DE -ratio between ME and digestible energy of diet; SEM -standard error of the mean.…”

Section: Discussionmentioning

confidence: 99%

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Effects of feed restriction and forage:concentrate ratio on digestibility, methane emission, and energy utilization by goats

et al. 2016

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-This study was carried out to to evaluate how feed restriction and different forage:concentrate ratios affect digestibility, methane emission (using the SF 6 technique), and energy utilization of Anglo-Nubian goats. Fifteen (15) dry and non-pregnant Anglo Nubian goats, averaging 30±2.9 kg body weight, were used. The experiment was divided into two trials, the first of which was designed to study the effects of feed restriction (0% or ad libitum; 15% of feed restriction or equivalent to 85% of ad libitum intake; and 40% of feed restriction or equivalent to 60% of ad libitum intake) and the second, to study the effects of forage:concentrate (F:C) ratios (75:25, 54:46, and 25:75) in the diet. The sulfur hexafluoride (SF 6 ) tracer gas method was used to collect and estimate methane (CH 4 ) emissions. Feed restriction level did not affect apparent total tract digestibility of dry matter (DM), organic matter, crude protein, and neutral detergent fiber. Methane emission (g d −1 ) decreased linearly as intake level decreased. However, energy loss in methane proportional to organic matter intake was similar among levels of feed restriction; consequently, dietary metabolizability did not differ among treatments. Methane gas (g d −1 ) as a function of F:C ratio revealed a quadratic response, showing the highest values when animals were fed the 46:54 F:C ratio diet (18.2 g d −1 ), suggesting that the decrease in absolute CH 4 occurred when the level of concentrate inclusion in the diet surpassed approximately 50%. The results presented herein may be relevant for the ongoing and future efforts towards completion of an IPCC inventory regarding the contribution of goats to the greenhouse gas effects on the planet.

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Section: Discussioncontrasting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Effects of feed restriction and forage:concentrate ratio on digestibility, methane emission, and energy utilization by goats

et al. 2016

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“…The drop in digestion at 0.4 M may relate to lower available energy for microbes (Doreau et al, 2003) and lower water intake.…”

Section: Digestibilitymentioning

confidence: 99%

Energy metabolism by splanchnic tissues of mature sheep fed varying levels of lucerne hay cubes

Elsabagh

Goto

Sugino

et al. 2013

Animal

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The objective of this study was to determine the pattern of energy metabolites net flux across the portal-drained viscera (PDV) and total splanchnic tissues (TSP) in mature sheep fed varying levels of lucerne hay cubes. Four Suffolk mature sheep (61.4 6 3.6 kg BW) surgically fitted with multi-catheters were fed four levels of dry matter intake (DMI) of lucerne hay cubes ranging from 0.4-to 1.6-fold the metabolizable energy (ME) requirements for maintenance. Six sets of blood samples were simultaneously collected from arterial and venous catheters at 30-min intervals. With increasing DMI, apparent total tract digestibility increased linearly and quadratically for dry matter (P , 0.05), quadratically (P , 0.05) with a linear tendency (P , 0.1) for organic matter and tended to increase quadratically (P , 0.1) for NDF. PDV release of volatile fatty acids (VFA) and b-hydroxybutyric acid was relatively low at 0.4 M and then linearly increased (P , 0.05) with increasing DMI. Net PDV flux of non-esterified fatty acids showed curvilinear decrease from 0.4 to 1.2 M and then increased at 1.6 M. The respective proportions of each VFA appearing in the portal blood differed (P , 0.05) with DMI and this difference was more obvious from 0.4 to 0.8 M than from 0.8 to 1.6 M. Heat production, as a percentage of ME intake (MEI), decreased linearly (P , 0.05) with increasing DMI accounting for 37%, 21%, 16% and 13% for PDV and 62%, 49%, 33% and 27% for TSP at 0.4, 0.8, 1.2 and 1.6 M, respectively. As a proportion of MEI, total energy recovery including heat production, decreased linearly with increasing DMI (P , 0.05) accounting for 113%, 83%, 62% and 57% for PDV and 140%, 129%, 86% and 83% for TSP at 0.4, 0.8, 1.2 and 1.6 M, respectively. Regression analysis revealed a linear response between MEI (MJ/day per kg BW) and total energy release (MJ/day per kg BW) across the PDV and TSP, respectively. However, respective contributions of energy metabolites to net energy release across the PDV and TSP were highly variable among treatments and did not follow the same pattern of changes in DMI.

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“…O consumo e os coeficientes de digestibilidade aparente dos nutrientes são influenciados por fatores como o teor de nutrientes, pelos efeitos associativos entre os alimentos, pela relação Volumoso:Concentrado e pelo processamento dos alimentos FURUSHO-GARCIA et al, 2003;SILVA et al, 2005;MACEDO JUNIOR et al, 2006;SILVA et al, 2007;ARRUDA et al, 2008;ZANINE & MACEDO JUNIOR, 2006;MACEDO JUNIOR et al, 2009;GOMES et al, 2012). O tempo de ruminação é, consideravelmente, influenciado pelas características físicas da dieta, como tamanho de partícula ), e pelo manejo nutricional adotado, como número de refeições (DOREAU & DOREAU, 2001;DEVRIES et al, 2005;DOREAU, et al, 2003). A determinação da produção de calor (PC) pelo animal em jejum é importante, pois representa a energia gasta com a mantença (RODRIGUEZ et al, 2007).…”

Section: Introductionunclassified

Tamanho de partícula do volumoso e freqüência de alimentação sobre o metabolismo energético e protéico em ovinos, considerando dietas com elevada participação de concentrado

Gomes¹,

Borges

et al. 2012

Rev. bras. saúde prod. anim.

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Rev. Bras. Saúde Prod. Anim., Salvador, v.13, n.3, p.732-744 jul./set., 2012 http://www.rbspa.ufba.br ISSN 1519 9940 732Tamanho de partícula do volumoso e freqüência de alimentação sobre o metabolismo energético e protéico em ovinos, considerando dietas com elevada participação de concentrado SUMMARYThis study aimed to evaluate the effect of different forage particle sizes and the feeding frequency on the animals metabolism. Eight lambs with 52.5kg live weight were distributed in a randomized block design according the 2x4 factorial, corresponding to two feeding frequencies and four particle sizes (2mm; 5mm; 10mm and 25mm). The forage used was the Tifton-85 hay (Cynodon spp.) and commercial concentrate, adjusting the forage: concentrate ratio to 25:75%. The respirometry experiment was conducted in an open circuit respiration chamber for small ruminants. The concentrations of oxygen, carbon dioxide and methane were determined. Nitrogen content was determined in urine. With these parameters was determined heat production (PC). The nitrogen retained represented 36.0% of Nitrogen (N) Rev. Bras. Saúde Prod. Anim., Salvador, v.13, n.3, p.732-744 jul./set., 2012 http://www.rbspa.ufba.br ISSN 1519 9940 733 intake (g/day) and 46.8% of N absorbed (g/day). The CH4 average production was 1.45L/UTM/day. The PC was approximately 40.0% of crude energy intake. The metabolizable energy was 73.2% of crude energy intake and the average value of net energy was 1807.35kcal/day. There was no effect of particle size and feeding frequency on the nitrogen balance and energy metabolism.

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Consequences of underfeeding on digestion and absorption in sheep

Cited by 48 publications

References 62 publications

Effects of feed restriction and forage:concentrate ratio on digestibility, methane emission, and energy utilization by goats

Effects of feed restriction and forage:concentrate ratio on digestibility, methane emission, and energy utilization by goats

Energy metabolism by splanchnic tissues of mature sheep fed varying levels of lucerne hay cubes

Tamanho de partícula do volumoso e freqüência de alimentação sobre o metabolismo energético e protéico em ovinos, considerando dietas com elevada participação de concentrado

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