Studies on Improving the nutritive value of Rice straw by Fermentation with Lyophyllum decastes -II. Effect of $H_2O_2\;and\;2Na_2CO_3{\cdot}3H_2O_2$ treatments-

Lyophyllum decastes를 이용(利用)한 볏짚의 발효사료(醱酵飼料)에 관한 연구(硏究) -ll. 과산화수소(過酸化水素) 및 과탄산(過炭酸)소다 처리(處理)의 영향(影響)-

The treatments of $H_2O_2$ were more effective on the degradation of difficult digestible materials by increasing the treatment concentration and adjusting the pH to alkaline. The smaller particle size of rice straw was, the more these effect. $2N_2CO_3{\cdot}3H_2O_2$, didn't need to adjust on pH, but the effect of treatment was lower than $H_2O_2$(pH 11.5) treatment. Lignin and hemicellulose content were decreased by the alkaline peroxide treatments. The fermentation of rice straw which pretreated with alkaline peroxide, the content of total nitrogen and ash increased. And NDF, hemicellulose and lignin were decreased, and ADF and cellulose decreased as the lower concentra­tion of treatment. The digestibility of rice straw which treated alkaline peroxide was increased with increasing the treatment concentration. The treatment of 12% $H_2O_2$(pH 11.5) and 12% $2Na_2^-CO_3{\cdot}3H_2O_2$ increased the digestibility from 31.1% to 89.4% and 76.8% compared with nontreated rice straw, respectively. The digestibility of fermented rice straw which pretreated with alkaline peroxide was effectively increased as the pretreatment concentration was low. Semi-dry treat­ment of $H_2O_2$ decreased the ADF and cellulose, and exhibited the 57.5% of digestjbility. Fer­mentation of rice straw which semi-dry treated with 4% $H_2O_2$, increased the digestibility from 33.4% to 63.4% compared with control.

볏짚의 $H_2O_2$ 처리는 첨가농도를 늘리거나 pH를 알칼리로 조정하는 것이 첨가비율을 증가시키는 것 보다 비소화성 물질의 분해에 효과적이었고 볏짚입자가 작을수록 이러한 효과는 현저하였다. $2Na_2CO_3{\cdot}3H_2O_2$는 pH를 조정할 필요는 없으나 처리효과는 pH를 11.5로 조정한 $H_2O_2$ 처리에 비하여 낮았다. Alkaline peroxide 처리에 의하여 lignin과 hemicellulose의 감소는 현저하였다. Alkaline peroxide 전처리 볏짚의 발효로 총질소와회분은 증가하였고, NDF, hemicellulose, lignin은 분해되어 감소되었으며, ADF와 cellulose는 저농도 처리에서 감소하였다. 볏짚의 소화율은 alkaline peroxide 처리농도가 증가할수록 향상되어 대조구의 31.0%에 비하여 pH를 11.5로 조정한 12% $H_2O_2$와 12% $2Na_2CO_3{\cdot}3H_2O_2$ 처리시 각각 89.4%, 76.8%로 상승되었다. Alkaline peroxide 전처리 볏짚의 발효에 의한 소화율의 상승은 저농도 전처리에서 효과적이었다. 4% $H_2O_2$ 반건식처리로 ADF와 cellulose는 감소되어 소화율은 57.5%이었고 전처리 볏질의 발효로 대조구의 33.4%에 비하여 63.4%로 상승되었다.