Interactive effects of supplemental Zn sulfate and ractopamine hydrochloride on growth performance, carcass traits, and plasma urea nitrogen in feedlot heifers1

2017 ◽  
Vol 95 (10) ◽  
pp. 4638-4645 ◽  
Author(s):  
C. L. Van Bibber-Krueger ◽  
R. G. Amachawadi ◽  
H. M. Scott ◽  
J. M. Gonzalez ◽  
J. S. Drouillard
2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 666-666
Author(s):  
C. L. Van Bibber-Krueger ◽  
J. M. Gonzalez ◽  
R. G. Amachawadi ◽  
H. M. Scott ◽  
J. S. Drouillard

2013 ◽  
Vol 91 (2) ◽  
pp. 811-818 ◽  
Author(s):  
V. V. Almeida ◽  
A. J. C. Nuñez ◽  
A. P. Schinckel ◽  
C. Andrade ◽  
J. C. C. Balieiro ◽  
...  

2008 ◽  
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pp. 7-12 ◽  
Author(s):  
J. L. Figueroa ◽  
M. Martínez ◽  
J. E. Trujillo ◽  
V. Zamora ◽  
J. L. Cordero ◽  
...  

2014 ◽  
Vol 57 (5) ◽  
pp. 742-754 ◽  
Author(s):  
Manuel Martínez-Aispuro ◽  
José Luis Figueroa-Velasco ◽  
Vicente Zamora-Zamora ◽  
José Luis Cordero-Mora ◽  
Carlos Narciso-Gaytán ◽  
...  

2009 ◽  
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pp. 26-32 ◽  
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G.J. Vogel ◽  
G.C. Duff ◽  
J. Lehmkuhler ◽  
J.L. Beckett ◽  
J.S. Drouillard ◽  
...  

1985 ◽  
Vol 40 (1) ◽  
pp. 153-160 ◽  
Author(s):  
S. J. Taylor ◽  
D. J. A. Cole ◽  
D. Lewis

ABSTRACTThe response of the growing female pig (25 to 55 kg live weight) to increasing dietary isoleucine supplies at two levels of dietary leucine was assessed by measurement of growth rate, food utilization, tissue deposition as indicated by ham dissection and changes in plasma urea concentration. A range of isoleucine concentrations from 3·7 g/kg to 5T g/kg of the diet was derived from a basal diet and seven increments of L-isoleucine. Synthetic L-leucine was added to the basal diet to increase the concentration from 12 g/kg to 15 g/kg to achieve the two levels. The basal diet was formulated using barley, maize, blood meal, yeast protein, fat and tapioca with synthetic amino acids included to maintain at least 9·5 g/kg lysine and adequate concentrations of other essential amino acids and non-essential nitrogen. The 16 diets were replicated four times and fed to 64 female growing pigs once daily according to a restricted feeding scale. Blood samples were taken from each pig at 40 kg live weight for the determination of plasma urea nitrogen.The addition of synthetic leucine to the basal diet had no consistent effect on growth performance or carcass quality, although it did result in elevated levels of plasma urea nitrogen. The response of growth performance and the composition of the ham joint to increasing dietary isoleucine concentration was interpreted by broken line functions which indicated an isoleucine requirement of 4·4 to 4·5 g/kg of the diet.


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