The effect of varieties and strains on chemical composition and in vitro dry matter digestibility of sodium hydroxide and ammonia treated rice (Oryza sativa L.) straw.
1995
Enishi O. | Shijimaya K. | Ohta H.
This experiment was conducted to clarify the effect of varieties and strains of rice (Oryza sativa L.) on their chemical composition and in vitro dry matter digestibility (IVDMD) of sodium hydroxide and ammonia treated straw. Straws of twenty four rice varieties and strains from fourteen japonica types, ten indica types were treated with sodium hydroxide and ammonia, respectively. The chemical composition and IVDMD of those rice straws were examined. The organic cell wall (OCW), acid detergent lignin (ADL) and silica contents of rice straws were decreased by sodium hydroxide treatment. The crude protein content was increased and OCW and ADL contents of rice straws were decreased by ammonia treatment. The IVDMD of rice straw was increased by sodium hydroxide and ammonia treatment, respectively. sodium hydroxide treatment was more effective than ammonia treatment. Varieties and strains which were originally low in IVDMD before treatment tended to increase their IVDMD by these alkaline treatments more than those with high IVDMD by nature.
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