Effects of zinc sulfate and coated zinc sulfate on lactation performance, nutrient digestion and rumen fermentation in Holstein dairy cows

2021 ◽  
pp. 104673
Author(s):  
C. Wang ◽  
Y.Z. Xu ◽  
L. Han ◽  
Q. Liu ◽  
G. Guo ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Zinc Sulfate ◽  
Rumen Fermentation ◽  
Lactation Performance ◽  
Nutrient Digestion ◽  
Holstein Dairy Cows

The effect of rumen-protected methionine and choline on plasma metabolites of Holstein dairy cows

2011 ◽  
Vol 149 (5) ◽  
pp. 639-646 ◽  
Author(s):  
M. ARDALAN ◽  
M. DEHGHAN-BANADAKY ◽  
K. REZAYAZDI ◽  
N. GHAVI HOSSEIN-ZADEH
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Plasma Metabolites ◽  
Lactation Performance ◽  
Plasma Nefa ◽  
Plasma Urea ◽  
Nonesterified Fatty Acids ◽  
Plasma Triglycerides ◽  
Holstein Dairy Cows

SUMMARYForty Holstein dairy cows in their first and second lactations were used from 4 weeks prepartum to 10 weeks postpartum to investigate the effects of feeding ruminally protected methionine and choline on plasma metabolites. Cows were randomly assigned to one of the following treatments in a 2×2 factorial design 4 weeks before their expected calving dates, using randomized blocks based on parity: no supplement (control), 18 g/d of rumen-protected methionine (RPM) product, 60 g/d of rumen-protected choline (RPC) product, or 18 g/d of RPM+60 g/d of RPC. Treatments did not affect plasma triglycerides, glucose, total protein, nonesterified fatty acids (NEFA), β-hydroxybutyrate (BHBA), plasma urea nitrogen (PUN) or aspartate aminotransferase (AST) during the prepartum period. For postpartum plasma NEFA concentrations, there were interactions between RPC or RPM and week postpartum. Feeding RPM increased plasma AST concentrations (P<0·05) and decreased plasma protein concentrations (P<0·05) in postpartum cows. After calving, feeding RPC increased (P<0·05) dry matter intake (DMI), milk yield, 40 g/kg fat-corrected milk (FCM) yield and energy-corrected milk (ECM) yield. This suggests that supplemental RPC can improve lactation performance of dairy cows.

Effects of isobutyrate on rumen fermentation, lactation performance and plasma characteristics in dairy cows

2009 ◽  
Vol 154 (1-2) ◽  
pp. 58-67 ◽  
Author(s):  
Q. Liu ◽  
C. Wang ◽  
W.Z. Yang ◽  
B. Zhang ◽  
X.M. Yang ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Rumen Fermentation ◽  
Lactation Performance ◽  
Plasma Characteristics

Effects of selenium yeast on rumen fermentation, lactation performance and feed digestibilities in lactating dairy cows

2009 ◽  
Vol 126 (1-3) ◽  
pp. 239-244 ◽  
Author(s):  
C. Wang ◽  
Q. Liu ◽  
W.Z. Yang ◽  
Q. Dong ◽  
X.M. Yang ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Rumen Fermentation ◽  
Lactation Performance ◽  
Selenium Yeast ◽  
Lactating Dairy Cows
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