scholarly journals Effects of Dietary Energy Density in the Dry Period on the Production Performance and Metabolism of Dairy Cows

2017 ◽  
Vol 08 (03) ◽  
pp. 104-126 ◽  
Author(s):  
Yun Wang ◽  
Qiuling Hou ◽  
Gaozhan Cai ◽  
Zhiyong Hu ◽  
Kerong Shi ◽  
...  
2013 ◽  
Vol 16 (4) ◽  
pp. 715-722 ◽  
Author(s):  
W. Nowak ◽  
R. Mikuła ◽  
E. Pruszyńska-Oszmałek ◽  
P. Maćkowiak ◽  
B. Stefańska ◽  
...  

Abstract The aim of the study was to investigate the effect of different energy concentrations in the isonitrogenous diet fed during the dry period on postpartum health, fertility and blood variables. Forty Holstein multiparous cows were dried 56 days before the expected day of calving and assigned to group (M) with moderate energy concentrations of 0.69 UFL/kg DM or to the low-energy group (L) with energy density of 0.61 UFL/kg DM. From the 7d before the expected day of calving until the 21d of lactation, all the cows were fed the same fresh transition diet (0.82 UFL/kg DM). From the 22d to the 90d of lactation, all the cows received the same highest energy-density lactation diet (0.90 UFL/kg DM). During the dry period the decline of BCS in groups M and L were 0.07 and 0.12 units respectively. The average decrease of BCS from calving to 56 d of lactation were the same in both experimental groups (0.21 BCS). The first-service conception rate tended to be higher in the M group. Insulin-like growth factor-1, glucose, β-hydroxybutyric acid, non-esterified fatty acid, thyroxine serum concentrations prepartum and 3 and 5d postpartum were not significantly affected by the treatment in the dry period.


2007 ◽  
Vol 85 (6) ◽  
pp. 1465-1477 ◽  
Author(s):  
Julia A Ello-Martin ◽  
Liane S Roe ◽  
Jenny H Ledikwe ◽  
Amanda M Beach ◽  
Barbara J Rolls

2012 ◽  
Vol 46 (3) ◽  
Author(s):  
Maria Raquel L. Pangan ◽  
Kathryn Kaye L. Dela Cruz ◽  
Maria Sylvia C. Nachura ◽  
Jeanelly L. Padolina ◽  
Moriah M. Ramos ◽  
...  

...


Author(s):  
Deborah Adewole ◽  
Janice L MacIsaac ◽  
Chengbo Yang

Broilers were allocated to eight treatments consisting of two energy levels: Normal (NE) and High (HE), and four folic acid (FA) levels (2.2, 5, 10 and 15 ppm). On d 42, two male and two female chickens were euthanized per pen and white striping (WS) evaluation was performed on the Pectoralis major. Birds fed HE diets had reduced (P<0.05) FI and FCR than those on NE diets. With increasing FA levels, there was reduced (P<0.05) WS score, increased (P<0.05) normal breast fillet percentage in female but not in the male chickens. WS scores were higher (P<0.01) in male chickens than in the females.


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