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Paper Information

Journal:   RESEARCH ON ANIMAL PRODUCTION   SPRING 2020 , Volume 11 , Number 27 ; Page(s) 27 To 34.
 
Paper: 

The Effect Of Reducing Ration Protein Level Using Commercial Premixes On The Performance And Blood Parameters Of Holstein Dairy Cows

 
 
Author(s):  Khorsand Hadi, Ghalamkari Hamid Reza, Sanei Abas, Rezaei Rasoul, Akbari Amir*
 
* company's research and development department of Sepahan Daneh Parsian
 
Abstract: 
The aim of this experiment was to evaluate the effects of concentrate premixes containing of by-pass proteins (BP) in balanced low protein diets for essential amino acids on performance, blood metabolites and nitrogen efficiency of lactation Holstein dairy cows. Twenty-four multiparous Holstein cows (in 3rd parity and DIM 80± 10) randomly were divided to three experimental rations including, 1) control ration with 17. 5% CP based on NRC 2001 recommendations, 2) Low protein ration containing concentrate premix with 16. 5% CP and 3) Low protein ration containing concentrate premix with 15. 5% CP. The ratio of the rumen undegradable protein (RUP) to rumen degradable protein (RDP) in experimental diets was 37: 63 and the ratio lysine to methionine was adjusted by concentrate premix up to 3: 1 and 2. 8: 1 in the diet 16. 5% and 15. 5% CP, respectively. The results showed that the dry matter intake (DMI) increased linearly with a reduction of CP in the diets (P=0. 048). The highest 3. 5% fat corrected milk yield (FCM) and energy corrected milk (ECM) was recorded for 16. 5% CP diet that showed a significant difference than other groups (P=0. 038). Milk protein yield and milk nitrogen efficiency (MNE) showed significantl difference between control and 16% CP diets (P=0. 05 and P=0. 03, respectively). This study showed that decreased in CP levels compared to recommended NRC values (2001), and providing an optimal ratio of limiting amino acids can increase nitrogen yield while maintaining production.
 
Keyword(s): Pre-Mixed,Bypass Protein,Feed Efficiency,Nitrogen Efficiency,Milk Production,Dairy Cattle
 
 
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APA: Copy

Khorsand, H., & Ghalamkari, H., & Sanei, A., & REZAEI, R., & AKBARI, A. (2020). The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows. RESEARCH ON ANIMAL PRODUCTION, 11(27 ), 27-34. https://www.sid.ir/en/journal/ViewPaper.aspx?id=815290



Vancouver: Copy

Khorsand Hadi, Ghalamkari Hamid Reza, Sanei Abas, REZAEI RASOUL, AKBARI AMIR. The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows. RESEARCH ON ANIMAL PRODUCTION. 2020 [cited 2022January18];11(27 ):27-34. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=815290



IEEE: Copy

Khorsand, H., Ghalamkari, H., Sanei, A., REZAEI, R., AKBARI, A., 2020. The Effect of Reducing Ration Protein Level Using Commercial Premixes on the Performance and Blood Parameters of Holstein Dairy Cows. RESEARCH ON ANIMAL PRODUCTION, [online] 11(27 ), pp.27-34. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=815290.



 
 
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