<![CDATA[Objective of this research was to study the effects of graded level supplementation of ammoniated zeolite on rumen metabolism parameters. This in vivo experiment was conducted in a 4x4 latine square design (LSD) with 4 treatments in 4 periods, using 4 crossbreed etawa male goats.  The treatments were T1 = basal diet + 0% ammoniated zeolite, T2 = basal diet + 2% ammoniated zeolite, T3 = basal diet + 4% ammoniated zeolite, and T4 = basal diet + 6% ammoniated zeolite. Level of ammoniated zeolite supplementation is based on dietary dry matter basis. The basal diet consists of 70% Napir grass and 30% concentrate. Each period of experiment consist of 2 weeks for adjustment, 1 week for preliminary, and 10 days for total collection. Result of the experiment showed that ammoniated zeolite supplementation significantly increased the total volatile fatty acids concentration and total organic acids concentration in the rumen. Improved total volatile fatty acids concentration in the rumen could be used as a good indicator for improving rumen metabolism. However, even the concentrations of ammonia in the rumen tend to increased by ammoniated zeolite supplementation the increasing is still not statistically significant. Ruminal pH measurement in this experiment revealed that the use of ammoniated zeolite not significantly affects the ruminal pH.Key Words:  ruminant, ammoniated zeolite, ruminal ammonia, volatile fatty acids, organic acidsAnimal Production 13(3):138-142 (2011)]]>
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