Effects of Winter and Summer Energy Levels on Heifer Growth and Reproductive Performance

1980 ◽  
Vol 51 (4) ◽  
pp. 837-842 ◽  
Author(s):  
R. P. Lemenager ◽  
W. H. Smith ◽  
T. G. Martin ◽  
W. L. Singleton ◽  
J. R. Hodges
Keyword(s):  
Reproductive Performance ◽  
Energy Levels

scholarly journals Influence of Dietary Fiber and Energy Levels on Reproductive Performance of Turkey Pullets

1954 ◽  
Vol 33 (6) ◽  
pp. 1159-1163 ◽  
Author(s):  
Henry Dymsza ◽  
R.V. Boucher ◽  
M.G. McCartney
Keyword(s):  
Dietary Fiber ◽  
Reproductive Performance ◽  
Energy Levels

scholarly journals Effects of Dietary Energy Levels on the Physiological Parameters and Reproductive Performance of Gestating Gilts

2016 ◽  
Vol 29 (7) ◽  
pp. 1004-1012 ◽  
Author(s):  
S. S. Jin ◽  
S. W. Jung ◽  
J. C. Jang ◽  
W. L. Chung ◽  
J. H. Jeong ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Energy Levels ◽  
Physiological Parameters ◽  
Dietary Energy

Effect of postweaning implantation of zeranol and dietary energy level on growth and reproductive performance of replacement beef heifers

1991 ◽  
Vol 71 (2) ◽  
pp. 265-270 ◽  
Author(s):  
M. Makarechian ◽  
P. F. Arthur ◽  
M. A. Price
Keyword(s):  
Reproductive Performance ◽  
Energy Requirement ◽  
Energy Levels ◽  
Reproductive Traits ◽  
High Energy ◽  
Dietary Energy ◽  
Maintenance Energy Requirement ◽  
And Control ◽  
Calving Difficulty ◽  
Effect On Growth

Eighty-one heifer calves weaned at an average age of 6 mo were used to study the effect of postweaning zeranol implantation, on the growth and reproductive performance of heifers fed to grow slowly on three dietary energy levels. Forty heifers were implanted with 36 mg of zeranol at 30 d and again at 120 d postweaning. The remaining heifers were used as ummplanted controls. Within the implanted and control groups, heifers were subdivided into three groups and fed either a low, medium or high energy diet, which provided approximately 105, 130 and 160%, respectively, of NRC maintenance energy requirement, until 1 yr of age. The heifers were then turned out to pasture with hay supplementation. Heifers were exposed to bulls for 35 d at approximately 14 mo of age. Zeranol had no significant effect on growth. The effect of zeranol on the reproductive traits studied was not significant, although the trend was that the zeranol implanted heifers had lower calf crop born (52.3 vs. 63.6%) and lower incidence of calving difficulty (18.5 vs. 32.1%) than control heifers. The level of energy in the diet had a significant (P < 0.01) effect on growth of the heifers, with those on the high energy diet having the highest mean growth rate, but no significant effect on reproductive performance. Key words: Zeranol, dietary energy, growth, reproduction, heifers

scholarly journals Interaction Effect of Vitamin E-selenium Supplementation and Metabolic Energy on Reproductive Performance of Joper Breeders

2021 ◽  
Vol 26 (3) ◽  
pp. 124
Author(s):  
Nining Haryuni ◽  
Hartutik Hartutik ◽  
Eko Widodo ◽  
Sri Wahjuningsih
Keyword(s):  
Vitamin E ◽  
Energy Level ◽  
Reproductive Performance ◽  
Egg Production ◽  
Energy Levels ◽  
Selenium Supplementation ◽  
Metabolic Energy ◽  
Acid Oxidation ◽  
Single Factor ◽  
Embryo Mortality

The side effect of fatty acid oxidation during lippoprotein synthesis is the release of oxygen in the tissue called reactive oxygen species (ROS). Metabolic stress in Joper brooders due to an imbalance between ROS and antioxidants causes a decrease in hatching egg production and quality. Therefore, research is needed to improve the reproductive performance of Joper broodstock by combining vitamin E-selenium supplementation and metabolic energy. This study used 200 hatched eggs resulting from a cross between 60 weeks old Sentul males and 35 weeks old ISA BROWN laying hens that had been treated. This study used a Factorial Completely Randomized Design (CRD) (2 x 4). The first factor is the energy level (2700 and 2800 kcal/kg) and the second factor is the dose of vitamin E-selenium supplementation (0, 25, 50, 75 and 100 ppm). Selenium dosage is 1ppm/mg vitamin E. The interaction between vitamin E-selenium supplementation and energy had a very significant effect (P&lt;0.01) in increasing DOC weight. The single factor energy level and vitamin E-selenium supplementation significantly (p&lt;0.05) in reducing embryo mortality and increasing hatchability, while fertility and eggshell quality were not affected by the two treatment factors. The conclusion of this study is the interaction between vitamin E-selenium supplementation and energy levels can increase the weight of Joper's DOC, while the single factor of vitamin E-selenium supplementation and energy levels can reduce embryo mortality and increase hatchability. The best interaction with 100 ppm vitamin E-selenium supplementation and energy 2800 kcal/kg.

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