Abstract
Bali Heifers Performance on Cassava Leaves, Palm Oil Sludge and Yeast Supplementation in a Ration Based on Kumpai Grass (Hymenachne amplexicaulis (Rudge) Nees)
Highlights
In the non-tidal swamp of South Sumatra, the forage supply mainly depends on aquatic vegetations, one of them is Kumpai grass (Hymenachne amplexicaulis (Rudge) Nees)
Palm oil sludge (POS) is one of the agro-industrial by-products from palm oil processing at a low price and available for small scale farming
Location and duration This research was conducted in the village of Tanjung Seteko, Ogan Ilir district, South Sumatra province of Indonesia, Rubber and oil palm plantations are dominantly cultivated in this area and serves a potential source of feed for beef cattle originating from the plantations by-products
Summary
In the non-tidal swamp of South Sumatra, the forage supply mainly depends on aquatic vegetations, one of them is Kumpai grass (Hymenachne amplexicaulis (Rudge) Nees). The utilization of Kumpai grass is limited by the high fiber fraction that may reduce intake and digestibility when fed alone in the diet (Ali et al, 2013; Rostini et al, 2014). The high price of concentrate was the main reason for the low frequency of cattle supplementation by smallholder farmers (Hernaman et al, 2018; Mumba et al, 2018). Concerning the price of commercial concentrate, the locally-available concentrate may increase cattle performances and farmer income. The supplementation of POS has a potency for increasing intake and cattle performance due to a higher content of water-soluble carbohydrates and a source of unsaturated fatty acids (Hayyan et al, 2010) that might reduce methane gas production (Machmüller et al, 2000; Vlaeminck et al, 2006). An often-used approach for boosting cattle production in humid tropical areas was cassava leaves since a higher crude protein (CP) content, especially branched amino acids.,The addition of branched amino acids in the ration was able to increase
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