Effects of dietary undegradable crude protein level on total non-structural carbohydrate (TNC) digestibility, and milk yield and composition of dairy cows

2002 ◽  
Vol 76 (1-2) ◽  
pp. 71-79 ◽  
Author(s):  
I Bruckental ◽  
S Abramson ◽  
S Zamwell ◽  
G Adin ◽  
A Arieli
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Protein Level ◽  
Crude Protein ◽  
Structural Carbohydrate ◽  
Crude Protein Level

scholarly journals Nitrogen utilisation by dairy cows fed diets differing in crude protein level with a deficit in ruminal fermentable nitrogen

2002 ◽  
Vol 42 (6) ◽  
pp. 545-557 ◽  
Author(s):  
Val�rie Monteils ◽  
Stefan Jurjanz ◽  
G�rard Blanchart ◽  
Fran�ois Laurent
Keyword(s):  
Dairy Cows ◽  
Protein Level ◽  
Crude Protein ◽  
Nitrogen Utilisation ◽  
Crude Protein Level

scholarly journals Responses of milk urea nitrogen content to dietary crude protein level and degradability in lactatingHolsteindairy cows

2011 ◽  
Vol 51 (No. 12) ◽  
pp. 518-522
Author(s):  
Zhai Sw ◽  
Liu Jx ◽  
Wu Ym ◽  
Ye Ja ◽  
Xu Yn
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Protein Level ◽  
Crude Protein ◽  
Latin Squares ◽  
Urea Nitrogen ◽  
Protein Levels ◽  
Dietary Crude Protein ◽  
Milk Urea ◽  
Crude Protein Level

 Two experiments were conducted to investigate the effects of dietary crude protein level and degradability on milk urea nitrogen (MUN) content. In experiment 1, twelve multiparous lactating cows averaging 176 days in milk were divided according to DIM and milk production into three 4 × 4 Latin squares with four 2-week periods. Cows were fed four diets with different crude protein levels (13.0, 14.0, 15.0, and 16.0%, DM basis) with isocaloric, respectively. Crude protein levels had a low effect on milk yield and composition (P > 0.05), but a significant effect on MUN content. There were significant differences in the MUN content of cows fed either of the two diets (P < 0.01). In experiment 2, fifteen multiparous Holstein dairy cows averaging 91 days in milk were classified according to DIM and milk production into five 3 × 3 Latin squares with three 3-week periods. Cows were fed one of the three isocaloric and isonitrogenous diets with RUP being 30.8%, 36.2%, and 41.6% (CP basis), respectively. Milk yield, milk composition, and MUN content were not significantly affected by protein degradability, and there were no significant differences between any two dietary treatments (P > 0.05). These results indicated that MUN might be used as a parameter to monitor the change in dietary protein levels.  

Effects of growth and dietary crude protein level until first insemination on milk production during first lactation in Holstein heifers

2011 ◽  
Vol 82 (6) ◽  
pp. 741-746 ◽  
Author(s):  
Takashige ISHII ◽  
Kenji KAWASHIMA ◽  
Haruo ORIBE ◽  
Hiromi UEDA ◽  
Toshiya HASUNUMA ◽  
...  
Keyword(s):  
Milk Production ◽  
Protein Level ◽  
Crude Protein ◽  
Dietary Crude Protein ◽  
Crude Protein Level

Practice on improving fattening local cattle production in Vietnam by increasing crude protein level in concentrate and concentrate level

2013 ◽  
Vol 45 (7) ◽  
pp. 1619-1626 ◽  
Author(s):  
Dinh Van Dung ◽  
Nguyen Xuan Ba ◽  
Nguyen Huu Van ◽  
Le Dinh Phung ◽  
Le Duc Ngoan ◽  
...  
Keyword(s):  
Protein Level ◽  
Crude Protein ◽  
Cattle Production ◽  
Concentrate Level ◽  
Crude Protein Level
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