TY  - JOUR
T1  - Effect of a Corn Straw or Mixed Forage Diet on Endocrine, Metabolism and Lactation Performance in Periparturient Cows
AU - Zhu, Huabin AU - Qin, Tong AU - Wang, Haoyu AU - Bu, Dengpan AU - Hao, Haisheng AU - Wang, Dong AU - Du, Weihua 
JO  - Journal of Animal and Veterinary Advances
VL  - 12
IS  - 2
SP  - 276
EP  - 282
PY  - 2013
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2013.276.282
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2013.276.282
KW  - Forage type
KW  -endocrine
KW  -metabolite
KW  -lactation performance
KW  -periparturient cows
AB  - The objective of this study was to evaluate the effect of 
  a corn straw or mixed forage diet on endocrine, metabolism and lactation performance 
  in periparturient Holstein cows. Twelve multiparous, periparturient Holstein 
  cows were randomly assigned to two groups and fed a corn straw or mixed forage 
  diet, respectively. The CS diet included 33.8% corn straw and the F:C ratio 
  [Dry Matter (DM)] was 60:40. The MF diet included 3.7% Chinese wildrye, 28.4% 
  alfalfa hay and 26.5% corn silage, the F:C ratio (DM) was 40:60. All cows were 
  fed from weeks 3-8 and Body Weight (BW), Body Condition Score (BCS) and Dry 
  Matter Intake (DMI) were recorded. Milk protein, fat, lactose and Somatic Cell 
  Count (SCC) were determined twice weekly. Metabolite and hormone analyses of 
  blood were made weekly. Results showed that dietary treatments had no detectable 
  effects on BW, BCS, DMI and blood hormones measured. From the 6 weeks of lactation, 
  cows fed MF diet produced more milk (p<0.05) and tended to produce more milk 
  fat (p = 0.07) and protein (p = 0.10) compared with cows fed CS diet. The proportions 
  of milk fat, protein and lactose (%) did not differ between the two dietary 
  treatments (p>0.05). In addition, the milk SCC in the CS group was significantly 
  higher (p = 0.02) than the MF group. Cows fed MF diet experienced more severe 
  Negative Energy Balance (NEB) and had higher concentrations of β-Hydroxy 
  Butyric Acid (BHBA) and Non-Esterified Fatty Acid (NEFA) than cows fed CS diet. 
  Collectively, these results suggest that cows fed MF diet improve lactation 
  performance of periparturient cows but this dietary treatment may have an adverse 
  effect on NEB of periparturient cows.
ER  -