稲わらの飼料価値に対する酸化剤とアンモニアの併用処理条件について〔英文〕

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In Experiment 1, rice straw (RS) was ensiled with 5% sodium chlorite (NaClO2, by air dry matter basis) at four levels of water, 50, 100, 200 and 400% (by wt.), followed by ammonia treatment. The addition of 5% ammonia (by wt.) to the straw ensiled with NaClO2 was conducted as follows: 1) Ammonia was simultaneously added with NaClO2 to the moistened RS, and reacted at 45°C for 3 days(SOARS). 2)Ammonia treatment was carried out on the NaClO2 treated RS(20°C, 3 days)with each level of water (IOARS). 3) The NaClO2 treated RS containing various levels of water was dried at 45°C for 24 hours and thereafter reacted with ammonia under the same condition described above (DOARS). Total nitrogen content and in vitro organic matter digestibility (48 hours) of ammonia treated straws markedly increased compared with those of original materials. The nitrogen content of DOARS was not affected by the level of added water but the values of SOARS and MARS decreased with 200 and 400% water level compared with those of 50 and 100% level. The fractionation of nitrogen in treated materials showed that ammonia nitrogen was not affected by the added water level but the amide nitrogen of SOARS and MARS declined as the water level increased. The values of in vitro organic matter digestibility and total VFA production were not affected by the water level. In Experiment 2, RS added 50% water and 5% NHS was simultaneously treated with 0, 5 or 10% NaClO2 at 4°C, room temperature (about 20°C) and 45°C for 5, 14, 20 and 40 days, respectively. The main effects of duration, temperaLure and level of NaClO2 on both total nitrogen and in vitro organic matter digestibility were statistically significant. Total nitrogen and in vitro organic matter digestibility increased as the duration, temperature and the level of NaClO2 increased. There was no significant effect of duration and temperature on VFA production but the 10% NaClO2 addition significantly decreased VFA production compared with those of the 0 and 5% NaClO2 treated materials.
社団法人日本畜産学会の論文

稲わらの飼料価値に対する酸化剤とアンモニアの併用処理条件について〔英文〕

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