Influence of Feed Intake and Source of Dietary Carbohydrate on the Metabolic Response to Propionate and Glucose Challenges in Lactating Goats

Context The food security of Tunisia is dependent on utilising all of its resources effectively to feed the population. Rangelands used for grazing are subject to continuous degradation, which reduces the availability of feeds to livestock. In the oasis regions, this constraint is attenuated by the systematic use of various by-products of the palm grove. There is a need to constantly search for alternative feed resources to support ruminant-livestock farming in arid regions and, therefore, the products of desert oases need to be exploited Aims The present work aimed to determine the effect of the use of local resources of oases on feed intake and milk quality of goats. Methods Twenty-four indigenous lactating goats were used to investigate the effect of the substitution of the concentrate feed with alternative feed obtained from oases in Tunisian arid zones. The three study groups in the 60-day trial were as follows: the first group received 0% date waste (WD) + 100% concentrate (CON) + oaten hay; the second group received 50% WD + 30% alfalfa cork (AC) + 20% CON + alfalfa hay; and the third group received 50% WD + 50% AC and no CON + alfalfa hay. Key results Feed intake was higher in Group 2 (1167.10 ± 42.8 g DM/day) than in Groups 3 and 1 (1028.9 ± 68.9 and 856.04 ± 58.9 g DM/day respectively. Average daily milk production did not differ among the groups. Dietary fat and crude protein were not affected by the type of ration. The concentrations of saturated fatty acids were similar in the milk of the three groups. In the three groups studied, the ratio n6:n3 (12.80, 8.80 and 6.77) was higher than the recommended value (<5) for human consumption. Conclusions The use of WD did not affect milk production but it improved the nutritional quality of milk, especially the composition of fatty acid (ratio n6/n3). Implications The use of alternative resources in goat feeding, such as WD and alfalfa cork, can replace the use of market feeds and decrease the costs of animal feed.

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Metabolic Response to Dietary Carbohydrate to Protein Rations in Carp

Fisheries Science ◽

10.2331/fishsci.61.277 ◽

1995 ◽

Vol 61 (2) ◽

pp. 277-281 ◽

Cited By ~ 28

Author(s):

Sadao Shimeno ◽

Driss Kheyyali ◽

Takafumi Shikata

Keyword(s):

Metabolic Response ◽

Dietary Carbohydrate

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The effects of dietary carbohydrate sources and forms on metabolic response and intestinal microbiota in sea bass juveniles, Dicentrarchus labrax

Aquaculture ◽

10.1016/j.aquaculture.2013.11.011 ◽

2014 ◽

Vol 422-423 ◽

pp. 47-53 ◽

Cited By ~ 33

Author(s):

François-Joël Gatesoupe ◽

Christine Huelvan ◽

Nicolas Le Bayon ◽

Armelle Sévère ◽

Inga Marie Aasen ◽

...

Keyword(s):

Intestinal Microbiota ◽

Metabolic Response ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Dietary Carbohydrate

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Impact of cow size on dry matter intake, residual feed intake, metabolic response, and cow performance

Journal of Animal Science ◽

10.2527/jas.2014-7702 ◽

2015 ◽

Vol 93 (2) ◽

pp. 672-684 ◽

Cited By ~ 14

Author(s):

R. S. Walker ◽

R. M. Martin ◽

G. T. Gentry ◽

L. R. Gentry

Keyword(s):

Feed Intake ◽

Dry Matter ◽

Metabolic Response ◽

Residual Feed Intake ◽

Dry Matter Intake ◽

Cow Performance

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Carbohydrate restriction regulates the adaptive response to fasting

AJP Endocrinology and Metabolism ◽

10.1152/ajpendo.1992.262.5.e631 ◽

1992 ◽

Vol 262 (5) ◽

pp. E631-E636 ◽

Cited By ~ 12

Author(s):

S. Klein ◽

R. R. Wolfe

Keyword(s):

Palmitic Acid ◽

Metabolic Response ◽

Ketone Bodies ◽

Energy Restriction ◽

Crossover Fashion ◽

Carbohydrate Restriction ◽

Dietary Carbohydrate ◽

Short Term ◽

Study Protocols ◽

Control Study

The importance of either carbohydrate or energy restriction in initiating the metabolic response to fasting was studied in five normal volunteers. The subjects participated in two study protocols in a randomized crossover fashion. In one study the subjects fasted for 84 h (control study), and in the other a lipid emulsion was infused daily to meet resting energy requirements during the 84-h oral fast (lipid study). Glycerol and palmitic acid rates of appearance in plasma were determined by infusing [2H5]glycerol and [1-13C]palmitic acid, respectively, after 12 and 84 h of oral fasting. Changes in plasma glucose, free fatty acids, ketone bodies, insulin, and epinephrine concentrations during fasting were the same in both the control and lipid studies. Glycerol and palmitic acid rates of appearance increased by 1.63 +/- 0.42 and 1.41 +/- 0.46 mumol.kg-1.min-1, respectively, during fasting in the control study and by 1.35 +/- 0.41 and 1.43 +/- 0.44 mumol.kg-1.min-1, respectively, in the lipid study. These results demonstrate that restriction of dietary carbohydrate, not the general absence of energy intake itself, is responsible for initiating the metabolic response to short-term fasting.

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