The Effects of Dietary Energy Level and Lysine on the Voluntary Food Intake and Biological Performance of Caged Layers

1966 ◽  
Vol 22 (2) ◽  
pp. 157-157
Author(s):  
R. Gill ◽  
C. G. Payne ◽  
D. Lewis
Keyword(s):  
Food Intake ◽  
Energy Level ◽  
Dietary Energy ◽  
Biological Performance ◽  
Voluntary Food Intake

The effects of dietary fibre, source of fat and dietary energy concentration on the voluntary food intake and performance of growing pigs

1986 ◽  
Vol 43 (2) ◽  
pp. 327-333 ◽  
Author(s):  
R. G. Campbell ◽  
M. R. Taverner
Keyword(s):  
Growth Rate ◽  
Food Intake ◽  
Energy Intake ◽  
Live Weight ◽  
Growing Pigs ◽  
Energy Concentration ◽  
Dietary Energy ◽  
Crude Fibre ◽  
Acid Detergent Fibre ◽  
Voluntary Food Intake

ABSTRACTNinety entire male pigs were used in two experiments to investigate the effects of energy concentration on the performance of growing pigs given diets containing relatively high or low levels of fibre. A blended fat product was also compared with tallow as a source of dietary energy for pigs in the first experiment.In experiment 1, 60 pigs growing between 20 and 45 kg live weight were given 10 diets containing approximately 120 g acid-detergent fibre per kg (80 g crude fibre per kg), and 10, 30, 50, 75 or 100 g/kg of either tallow or the blended fat product.Although the source of fat had no significant effect on food intake or growth performance, voluntary energy intake and growth rate increased with increase in the level of fat added to the diet and with concomitant increase in dietary digestible energy (DE) concentration up to 50 g/kg and 13·2 MJ/kg respectively. Further increase in the level of fat added to the diet and in DE concentration resulted in a decline in voluntary food intake, whilst energy intake and growth rate remained relatively constant at 27 MJ/day and 720 g/day respectively.In experiment 2, 30 pigs were used to investigate the animals' response to five levels of dietary DE concentration (11·8 to 15·1 MJ DE per kg) between 20 and 50 kg live weight. The highest level of acid-detergent fibre in the diets was 62 g/kg (50 g crude fibre per kg) and this declined with increase in energy concentration to 30 g/kg (25 g crude fibre per kg) in the diet of highest energy concentration.Voluntary food intake was not significantly affected by dietary energy concentration, and voluntary energy intake and growth rate increased linearly with increase in dietary energy concentration up to 14·5 MJ DE per kg. Maximum energy intake (31 MJ DE per day) and growth rate (905 g/day) in experiment 2 was proportionately 0·15 and 0·26 higher than that achieved by pigs given the higher fibre diets in experiment 1.The results for voluntary food intake and growth rate suggested that the pig's demand for energy and consequently its response to dietary energy concentration was affected by dietary fibre concentration.

scholarly journals Voluntary food intake and reproduction

1987 ◽  
Vol 46 (2) ◽  
pp. 193-201 ◽  
Author(s):  
J. M. Forbes
Keyword(s):  
Food Intake ◽  
Voluntary Food Intake

scholarly journals Effect of precalving and postcalving dietary energy level on performance and blood metabolite concentrations of dairy cows throughout lactation

2011 ◽  
Vol 94 (2) ◽  
pp. 808-823 ◽  
Author(s):  
R.A. Law ◽  
F.J. Young ◽  
D.C. Patterson ◽  
D.J. Kilpatrick ◽  
A.R.G. Wylie ◽  
...  
Keyword(s):  
Energy Level ◽  
Dairy Cows ◽  
Dietary Energy ◽  
Blood Metabolite ◽  
Metabolite Concentrations

Realimentation of Cull Range Cows. I. Effect of Final Body Condition and Dietary Energy Level on Rate, Efficiency and Composition of Gains

1979 ◽  
Vol 48 (4) ◽  
pp. 913-918 ◽  
Author(s):  
R. S. Swingle ◽  
C. B. Roubicek ◽  
R. A. Wooten ◽  
J. A. Marchello ◽  
F. D. Dryden
Keyword(s):  
Energy Level ◽  
Body Condition ◽  
Dietary Energy

79 Effects of Age at First Breeding and Dietary Energy Level during the Rearing Period of Replacement Gilts.

2018 ◽  
Vol 96 (suppl_2) ◽  
pp. 41-41
Author(s):  
A Hosseindoust ◽  
Y Choi ◽  
S Oh ◽  
M Kim ◽  
K Y Kim ◽  
...  
Keyword(s):  
Energy Level ◽  
Dietary Energy ◽  
Age At First Breeding

The effect of body reserves at farrowing on the reproductive performance of first-litter sows

1989 ◽  
Vol 48 (2) ◽  
pp. 449-457 ◽  
Author(s):  
B. P. Mullan ◽  
I. H. Williams
Keyword(s):  
Food Intake ◽  
Milk Production ◽  
Reproductive Performance ◽  
Live Weight ◽  
Low Level ◽  
Body Reserves ◽  
H 30 ◽  
Voluntary Food Intake

ABSTRACTThe level of body reserves in first-litter sows was manipulated by giving gilts one of three levels (high (H), medium (M) or low (L)) of food from selection (44 kg live weight) to parturition. The aim of this experiment was either to maintain or to mobilize these reserves during lactation (31·4 days) by feeding sows to appetite (high (H)) or 2·0 kg/day (low (L)).When the level of body reserves was increased prior to farrowing (171 kg live weight, 32 mm backfat) sows had a lower voluntary food intake during lactation than those animals that farrowed with a low level of body reserves (126 kg live weight, 20 mm backfat) (H-H v. L-H, 3·4 v. 4·9 kg/day; P < 0·001). Both groups had a normal return to oestrous activity after weaning (mean interval between weaning and mating of 14 days) but the heavier animals mobilized more of their body reserves (H-H −30·7 kg live weight, -4·3 mm backfat; L-H -3·6 kg live weight +0·9 mm backfat; P < 0·001). When food intake during lactation was restricted to 2·0 kg/day the interval between weaning and mating was increased by 50% regardless of the level of body reserves present at farrowing. For the same animals, there were insufficient body reserves to support milk production at the same level as for those animals given food t o appetite.

A note on the response of pigs weaned at 28 days to dietary protein

1986 ◽  
Vol 42 (3) ◽  
pp. 427-429 ◽  
Author(s):  
R. G. Campbell ◽  
M. R. Taverner
Keyword(s):  
Growth Rate ◽  
Food Intake ◽  
Dietary Protein ◽  
Live Weight ◽  
Gain Ratio ◽  
Digestible Energy ◽  
Voluntary Food Intake

ABSTRACTThirty-six piglets were used to investigate the effect of six concentrations of dietary protein ranging from 155 to 235 g/kg, and corresponding dietary lysine concentrations from 10·1 to 15·4 g/kg, on the performance of pigs weaned at 28 days of age and growing between 7·5 and 20 kg live weight. Voluntary food intake was not significantly affected by dietary protein, and growth rate increased with increase in dietary protein and lysine up to 167 and 10·9 g/kg respectively (0·75 g lysine per MJ digestible energy (DE)). Food: gain ratio improved significantly with each increase in dietary protein and lysine up to 177 and 11·6 g/kg (0·79 g lysine per MJ DE) respectively.

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