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苛性소다 處理에 依한 볏짚 Silage 의 飼料價値 增進硏究
辛炯泰,朴昌學,金章鎬,金贊昊 成均館大學校 1981 論文集 Vol.30 No.-
Nylon bag dry matter digestibility (NBDMD, %) and nylon bag organic matter digestibility(NBOMD, %) were measured to evaluate the nutritive value of Tongil and Akibare rice straws ensiled after NaOH treatment by using Korean native male goats. Experimental Korean native male goat, weighing approximately 30㎏ each, was equipped with rumen cannula. Three grams of dried samples by grinding with 2.45㎜ Wiley mill screen were put into a bag 9×14 ㎠ made of 100 mesh nylon. Nylon bags were put into the ventral sac of the rumen and taken out at the end of 72 hours. They were washed, dried in an oven at 90-100℃ for 24 hours and weighed “NBDMD (%)” and ashed in an muffle furnace at 550-600℃ for 2 hours and weighed “NBOMD”(%)”. The results which were obtained with this experiment were as follows: 1. The NBDMD (%) and NBOMD (%) of NaOH-treated Tongil and Akibare silage were highly significant different (p〈0.01) in different levels of NaOH and variety of rice straw, but NBDMD(%) and NBOMD(%) were not affected by moisture content of rice straw silage (p〉0.05). 2. The relationship between NBDMD (Y_1, %) of Tongil and Akibare rice straw silage and NaOH concentration (X, %) at 72 hours rumen incubation was: Tongil rice straw silage (50%) : Y_1=4.70X+43.67 (r=0.96^*) Tongil rice straw silage (70%) : Y_1=4.61X+46.23 (r=0.99^**) Akibare rice straw silage (50%) : Y_1=4.61X+32.93 (r=0.95^*) Akibare rice straw silage (70%) : Y_1=4.97X+35.68 (r=0.97^*) 3. The relationship between NBOMD (Y_2, %) of Tongil and Akibare rice straw silage and NaOH concentration (X, %) at 72 hours rumen incubation was: Tongil rice straw silage (50%) : Y_2=4.74X+40.21 (r=0.97^*) Tongil rice straw silage (70%) : Y_2=4.05X+43.55 (r=0.99^**) Akibare rice straw silage (50%) : Y_2=4.24X+30.26 (r=0.95^*) Akibare rice straw silage (70%) : Y_2=4.34X+30.27 (r=0.97^*) 4. The optimum level of NaOH for improving NBDMD (%) and NBOMD (%) from Tongil and Akibare rice straw silage, on the basis of Blaster et al (1961), was 3% NaOH for Tongil and 4% NaOH for Akibare. But the optimum level of NaOH for rice straw silage, on the basis of Dr. McCullough's theory, was 6% NaOH for Tongil and Akibare. 5. The NBDMD (%) of ensiled NaOH-treated rice straw were more improved 20-30% than freshly-treated rice straw. It is concluded that the nutritive value of stored straw is higher than that of freshly-treated material.
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