Effect of moisture content and different levels of additives on chemical composition and in vitro dry matter digestibility of rice straw
1997
Pradhan, R. (Kyushu Tokai Univ., Choyo, Kumamoto (Japan). Faculty of Agriculture) | Tobioka, H. | Tasaki, I.
The effects of additives and a combination of alkaline or enzyme treatment with that of a nitrogenous compound on improvement for the utilization of rice straw by ruminants were determined. In experiment 1, rice straw of ca 500 g dry matter (DM) each was treated with sodium hydroxide (NaOH), calcium hydroxide (Ca(OH)2), urea, ammonia, NaOH + urea, (Ca(OH)2) + urea, and cellulolytic enzymes such as clampzyme and cellulase with or without urea adjusting the DM level to 65% or 80% and the effect on the chemical composition and the in vitro dry matter digestibility (IVDMD) of rice straw was observed. In experiment 2, rice straw of 5 kg DM each was treated with either 6 kg urea or 3 kg ammonia per 100 kg straw D+M and the DM level was adjusted to 65%, 72.5% or 80%. Ammonia treatment tended to lower the NDF and hemicellulose content. From these results, the treatment with NaOH 2% + urea 4% at both DM levels and Ca(OH)2 4% + urea 4% at 65% D+M level seems to be more favorable for higher CP content, prevention of mold growth and improved IVDMD
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