Effect of Phosphorus Supplementation to Ammoniated Rice Straw on Rumen Fermentability, Microbial Protein Synthesis and in vitro Nutrient Degradability

Authors

  • A. Tjakradidjaya Department of Animal Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Kampus Dramaga, Bogor, 16680, Indonesia
  • M. Zain Faculty of Animal Science, Andalas University, Kampus Limau Manis, Padang, 25163, Indonesia
  • N. Jamarun Faculty of Animal Science, Andalas University, Kampus Limau Manis, Padang, 25163, Indonesia
  • Z. Zulkarnaini Departement of Animal Production, Faculty of Agriculture, Muaro Bungo University, Pendidikan Street Sungai Binjai km 6.5 Muaro Bungo Jambi, Indonesia
Abstract:

The effect of phosphorus supplementation to ammoniated rice straw was studied. The in vitro experiment was carried out following the first stage of Tilley and Terry method. The treatments consisting of four diets were A= 50% ammoniated rice straw + 50% concentrate (control), B= A + 0.2% phosphorus (P) supplement, C= A + 0.4% phosphorus (P) supplement, and D= A + 0.6% phosphorus (P) supplement of dry matter. Completely randomized design was used as the experimental design with differences among treatment means were examined using Duncan’s multiple range test. Variables measured were total bacterial and cellulolytic bacterial population, cellulolytic enzyme activity, ammonia (NH3) and volatile fatty acid (VFA) concentrations, as fermentability indicators and synthesized microbial protein, as well as degradability indicators including dry matter (DM), organic matter (OM), neutral detergent fibre (NDF), acid detergent fibre (ADF) and cellulose. The results indicated that fermentability and degradability of diets consisting ammoniated rice straw with P supplementation were significantly higher than the control diet (P

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Journal title

volume 2  issue 2

pages  163- 166

publication date 2012-06-01

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