In-vitro Digestibility of Ammoniated Aromatic Supplemented Lemongrass Waste
In-vitro Digestibility of Ammoniated Aromatic Supplemented Lemongrass Waste
Elihasridas, Mardiati Zain*, Roni Pazla, Simel Sowmen, Qurrata Aini
ABSTRACT
Aromatic lemongrass waste is promising as an alternative roughage source for grass substitution for ruminants, but the lignin content is relatively high, so it has low digestibility. We evaluated the effectiveness of precursor rumen microbial growth supplementation to increase the digestibility of ammoniated aromatic lemongrass waste. The precursor rumen microbial growth supplement contains cassava leaves as a source of branched-chain amino acids, phosphorus, and zinc minerals, which was administered as follows: T0= ammoniated aromatic lemongrass waste, T1= T0 + 5% cassava leaf, T2= T1 +0.4% mineral phosphorus, T3= T1 +100 ppm mineral zinc, and T4= T1 + 0.4% mineral phosphorus and 100 ppm mineral zinc. The degradation of various components such as dry matter, organic matter, crude protein, neutral detergent fiber, acid detergent fiber, cellulose, and hemicelluloses in the ammoniated aromatic lemongrass waste samples was evaluated by incubating them on in-vitro media at 39ºC/48 h. The analysis of variance following a 5 x 4 randomized block design was used. The results revealed a significant (P<0.05) increase in the digestibility of ammoniated aromatic lemongrass waste in the rumen. The degradation of ammoniated aromatic lemongrass waste was found to be significantly (P<0.05) higher when supplemented with cassava leaves and mineral zinc (T3) compared to others. However, it was observed to be significantly (P<0.05) lower than T4. Cassava leaf, mineral phosphor, and zinc (T4) were found to be the most effective in enhancing the digestibility of ammoniated aromatic lemongrass waste in the rumen.
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