
	Pakistan Journal of Nutrition
	Year: 2019 \| Volume: 18 \| Issue: 1 \| Page No.: 12-19 DOI: 10.3923/pjn.2019.12.19

Optimization of Rumen Microbial Protein Synthesis by Addition of Gambier Leaf Residue to Cattle Feed Supplement

Ramaiyulis

, Rusmana Wijaya Setia Ningrat

, Mardiati Zain

and Lili Warly

Abstract: Background and Objective: This study aimed to achieve optimal microbial protein synthesis by adding various levels of gambier leaf residue (GLR) to cattle feed supplement (CFS). Materials and Methods: Gambier (Uncaria gambir Roxb) leaf residue containing 9.96% condensed tannins was added at levels of 0, 2.5, 5.0 and 7.5% (DM) to CFS formula containing 29% crude protein and then tested in vitro rumen digestion. Results: Addition of 5% GLR significantly decreased the rumen protozoan population by 24.43% (p<0.05) and decreased the NH₃-N content (p<0.01) but did not affect the pH or total volatile fatty acid (VFA) content (p>0.05). The mean of the microbial biomass was 111-285 mg 100^–1 mL of rumen fluid and the microbial protein concentration was 59-157 mg 100^–1 mL of rumen fluid, which was highest at 5.0 GLR (p<0.01). Overall, the rate of microbial biomass production, rate of microbial protein synthesis and efficiency of microbial protein synthesis were 7.30-10.18 mg 100^–1 mL h^–1, 3.86-5.62 mg 100^–1 mL h^–1 and 16-47 mg microbial protein 100^–1 mg digested organic matter, respectively, with the highest rate at 5.0% GLR and the lowest rate in controls (p<0.01). Conclusion: Addition of 5.0% GLR to CFS can optimize microbial protein synthesis in the rumen.

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RELATED ARTICLES:

•	Protection of Protein in Cattle Feed Supplement from Rumen Microbial Degradation with Addition of Gambier Leaf Residue

•	Effects of Supplementation of Different Sources of Tannins on Nutrient Digestibility, Methane Production and Daily Weight Gain of Beef Cattle Fed on Ammoniated Oil Palm Frond Based Diet

How to cite this article:

Ramaiyulis , Rusmana Wijaya Setia Ningrat, Mardiati Zain and Lili Warly, 2019. Optimization of Rumen Microbial Protein Synthesis by Addition of Gambier Leaf Residue to Cattle Feed Supplement. Pakistan Journal of Nutrition, 18: 12-19.

DOI: 10.3923/pjn.2019.12.19

URL: https://scialert.net/abstract/?doi=pjn.2019.12.19

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