scholarly journals Effect of Feed and Light Regimes during the Growing Period on Subsequent Reproductive Performance of Broad Breasted White Turkeys Fed Two Protein Levels

1978 ◽  
Vol 57 (1) ◽  
pp. 27-37 ◽  
Author(s):  
K.K. KRUEGER ◽  
J.A. OWEN ◽  
C.E. KRUEGER ◽  
T.M. FERGUSON
Keyword(s):  
Reproductive Performance ◽  
Light Regimes ◽  
Protein Levels ◽  
Growing Period

scholarly journals Effects of dietary energy and protein levels on reproductive performance in gestating sows and growth of their progeny

2019 ◽  
Vol 61 (3) ◽  
pp. 154-162
Author(s):  
Lin Hu Fang ◽  
Ying Hai Jin ◽  
Jae Hark Jeong ◽  
Jin Su Hong ◽  
Woo Lim Chung ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Dietary Energy ◽  
Protein Levels

The effect of different dietary protein levels in the rearing phase (from 60 kg) on body composition and reproductive performance of gilts

1996 ◽  
Vol 1996 ◽  
pp. 143-143
Author(s):  
M C Cia ◽  
S A Edwards ◽  
V L Glasgow ◽  
M Shanks ◽  
H Fraser
Keyword(s):  
Body Composition ◽  
Reproductive Performance ◽  
Large White ◽  
Muscle Area ◽  
Eye Muscle ◽  
Protein Levels ◽  
Fat Reserves ◽  
Low Protein ◽  
Protein Diets ◽  
Real Time Ultrasonography

Low protein diets have been proposed as a way to enhance fat reserves and reduce liveweight gain in breeding animals of very lean genotypes. The objective of this study was to examine the effect of different protein levels on daily gain, body composition and reproductive performance of gilts.At 118 (sem=0.28) days old, 54 genetically lean gilts ((Landrace x Large White) x Large White) were allocated, considering firstly age and secondly weight, between three treatments with different dietary lysine:energy (g/MJ DE) ratios: High (0.9), Medium (0.6) and Low (0.3), fed twice daily at 2.9 x maintenance energy. Animals were weighed weekly and backfat thickness (P2) and muscle depth values were also taken. Eye muscle area measurements were taken by real time ultrasonography (Aloka 500) at the end of the experiment At 160 days of age, puberty was induced by administration of exogenous gonadotropin (PG600).

The performance of laying hens fed various dietary protein levels in the growing period and first laying year

1971 ◽  
Vol 11 (49) ◽  
pp. 161 ◽  
Author(s):  
JK Connor ◽  
HW Burton
Keyword(s):  
Dietary Protein ◽  
Sexual Maturity ◽  
Egg Production ◽  
Bodyweight Gain ◽  
Protein Restriction ◽  
Protein Layer ◽  
Egg Weight ◽  
Protein Levels ◽  
Growing Period ◽  
Laying Performance

Two experiments examined the effects of protein restriction in the growing period on the production of egg type pullets. The protein levels of diets fed in the growing period were 15, 13, and 11 per cent. The treatments were incorporated in factorial designs with nutritional treatments in the laying period involving diet protein levels of 17, 15, and 13 per cent and, for one of the experiments, with housing densities of either 4 sq. ft. or 2 sq. ft. per bird. Restriction of protein during the growing period retarded growth and delayed sexual maturity, but neither of the levels of restriction examined increased subsequent laying performance. Eggs lost due to delays in the onset of production were not compensated for by increases in subsequent production and egg weight was generally depressed by protein restriction. The pattern of egg production was altered by restriction. A 13 per cent protein layer diet introduced at point of lay also reduced bodyweight gain and delayed age at sexual maturity. Interactions between nutritional and housing treatments in the growing and laying periods were apparent in egg production and egg weight.

The effect of different dietary protein levels in the rearing phase (from 60 kg) on body composition and reproductive performance of gilts

1996 ◽  
Vol 1996 ◽  
pp. 143-143
Author(s):  
M C Cia ◽  
S A Edwards ◽  
V L Glasgow ◽  
M Shanks ◽  
H Fraser
Keyword(s):  
Body Composition ◽  
Reproductive Performance ◽  
Large White ◽  
Muscle Area ◽  
Eye Muscle ◽  
Protein Levels ◽  
Fat Reserves ◽  
Low Protein ◽  
Protein Diets ◽  
Real Time Ultrasonography

Low protein diets have been proposed as a way to enhance fat reserves and reduce liveweight gain in breeding animals of very lean genotypes. The objective of this study was to examine the effect of different protein levels on daily gain, body composition and reproductive performance of gilts.At 118 (sem=0.28) days old, 54 genetically lean gilts ((Landrace x Large White) x Large White) were allocated, considering firstly age and secondly weight, between three treatments with different dietary lysine:energy (g/MJ DE) ratios: High (0.9), Medium (0.6) and Low (0.3), fed twice daily at 2.9 x maintenance energy. Animals were weighed weekly and backfat thickness (P2) and muscle depth values were also taken. Eye muscle area measurements were taken by real time ultrasonography (Aloka 500) at the end of the experiment At 160 days of age, puberty was induced by administration of exogenous gonadotropin (PG600).

scholarly journals The effect of superovulation and different feed protein levels on sow reproductive performance

2020 ◽  
Vol 492 ◽  
pp. 012080
Author(s):  
Mien Th R Lapian ◽  
A F Pendong ◽  
C A Rahasia ◽  
Z Poli ◽  
V R W Rawung
Keyword(s):  
Reproductive Performance ◽  
Protein Levels ◽  
Feed Protein

NUTRIENT REQUIREMENTS FOR CANADIAN YORKSHIRE SWINE: III. A STUDY OF THE U.S. N.R.C (1959) NUTRIENT STANDARDS FOR SWINE BY LINEAR PROGRAMMING

1963 ◽  
Vol 43 (1) ◽  
pp. 118-134 ◽  
Author(s):  
J. M. Bell
Keyword(s):  
Linear Programming ◽  
Pantothenic Acid ◽  
Indirect Evidence ◽  
Feed Consumption ◽  
Nutrient Contents ◽  
Protein Levels ◽  
Growing Period ◽  
Linear Programming Methods ◽  
Minimum Requirements ◽  
Significant Superiority

Pigs were individually fed rations electronically formulated by linear programming methods, with 14 nutrients under experimental control in least-cost rations. The test periods involved three successive phases between weights of 50–200 pounds with ration changes at 100 and 150 pounds. The criteria included weight gains, feed consumption, digestibility or energy and protein, and carcass measurements at 200 pounds.Five grower rations were fed to the pigs between 50–100 pound weights: 1) a control: 2) a ration with nutrient specifications equal to the minimum requirements; 3) as 2), plus 25 p.p.m. aureomycin; 4) a ration having levels of 12 nutrients increased by 15 per cent over the minimum requirements; 5) as 4) plus 25 p.p.m. aureomycin.Four finisher rations were tested, involving the four possible combinations of digestible energy (DE) and protein levels as specified for ’meat’ and ’bacon’ type pigs at 100- and 150-pound weights.The results obtained in the growing period indicated significant superiority of rations with augmented nutrient levels. By comparing the nutrient contents of the various rations it was concluded that rations based on minimum requirements were adequate in methionine, riboflavin, pantothenic acid, calcium and vitamin B12. On indirect evidence it was considered improbable that vitamins A and D, zinc or phosphorus NRC specifications were too low. The failure of the ’minimum standards’ ration appeared to involve protein, lysine and/or tryptophan levels. All pigs, however, utilized their DE more efficiently than NRC standards imply. The question of an optimum DCP:DE ratio is discussed. The antibiotic had no significant effect on gains or feed efficiency but, even though discontinued at 100-pound weight, aureomycin influenced carcass quality.The finishing period results favored higher protein levels and lower DE levels from the standpoint of carcass quality but gains equal to NRC standards were possible with less DE and, in the 150–200 pound weight range, with lower DCP:DE ratios than specified for bacon pigs.

Sign in / Sign up

Export Citation Format

Share Document