Pengaruh Nisbah Energi-Protein, Nitrogen-Sulfur dan Kalsium-Fosfor Terhadap Produk Metabolisme Rumen dan Kecernaan Substrat
ABSTRACT: The Rumen microbes
are capable to digest the glucosa polymer of plant waste for energy source and
can used the Non Protein Nitrogen (NPN) for body protein synthesis, if the
other precussor (Sulphur, Phospor and Branch Chain of Carbon) are available. To know the effectivity of the utilization of
plant waste for energy, an experiment have been conducted by in vitro method,
used the Randomized Black Design, four replication, factorial 33. The factors tested are : (1) three levels of
energy : protein (E/P) ratio : 4, 5 and 6; (2) three levels of Nitrogen :
Sulphur (N/S)ratio: 7.5, 10 and 12.5; (3) three levels of Calsium : Phospor
(Ca/P) ratio : 0.5, 1 and 2. The variables measured are : synthesis of protein
microbes (SPM) ; production of Volatile Fatty Acid (VFA) and Nitrogen Ammonia
(N-NH3); the digestibility of substrat. Based on the all variable measured, the
experiment can be concluded : (1) the effectivity of the utilization of rice
straw will be increased if it used is fortified with 50 percent TDN as energy
source (E/P=4), 0.20 percent dry matter of sulphur (N/S=10) and 0.0625 - 0.125
percent dry matter (DM) of phospor (Ca/P=1.0 – 2.0); (2) To stimulate the
activity of cellulolytic microbes, its need the fortification of sulphur until
reach the optimum level (must be investigated).
Keywords: fortification; rumen
metabolism; digestibility
Penulis: S.N.O. Suwandyastuti
Kode Jurnal: jppeternakandd130021
