Studies on Feed Value of Waste Rice Straws for Broiler Chicken

육계병아리 사육에 있어서 느타리버섯 재배 폐볏짚의 사료가치에 관한 연구

The Waste Rice Straws (W.R.S.) after cultivation with the Pleurotas Ostreatus SACCARDO was substituted for wheat bran in the broiler ration. The results of the experiment 1 and 2 obtained were summerized as follows; 1. The content of C. protein in the W.R.S. showed 1.5% higher value than that in the rice straw. No change was detected in the content of C. fat. However the content of C. fiber and N.F.E in W.R.S. decreased in comparision with those of raw rice straw. 2. The treated groups were inclned to rapid gain of body weight, especially the 4% W.R.S. group had been showed significatly higher value of gain than the control and 6% treated groups (p＜0.05 ). 3. No significant differences were observed in the amount of feet intake among experimental groups, even if the treated groups showed slightly higher intake than control group. 4. The treated groups in W.R.S. were inferior to the control group in feed intake but there were no significant differences. 5. The methionine in W.R.S. was the only amino acid which contained similar quantity of wheat brans. 6. To extend the amount of W.R.S. in broiler ration the 6% of W.R.S. was substituted for wheat bran and methionine mixture was added. No significance differences had been showed in weight gain, feed intake and feed efficiency between control and treated groups. Even though the treated groups showed more feed intake and lower weight gain in comparision with control group. 7. The methionine added group showed adverse effect in economics of production (p＜0.01) because of high cost of the methionine mixture, Therefore less than. 6% of the WRS could be substituted for wheat bran. According to the results of the experiment 1 and 2 it could be concluded that maximum use of the W.R.R. as substitute for wheat bran was less than 4% of the ration.

Broiler 사료에 있어서 밀기울 대신 느타리버섯재배 폐볏집을 대치하는 실험을 1,2차에 걸쳐 시험한 결과를 요약하면 다음과 같다. 1. 공시재료인 느타리버섯재배 폐볏짚의 조성분을 분석한 바 원료볏짚과 비교하면 조단백질은 1.5% 증가되었고, 조지방에는 큰 변화가 없었으나 가용 무질소물과 조섬유는 약 10%이상 감소를 보이고 있었다. 2. 증체량은 느타리버섯재배 폐볏짚으로 대치한 구가 대조구에 비해 더욱 빨리 증체하는 경향을 보였으며, 특히 4% 대치구와 유의성을 나타내고 있었다 (P＜0.05). 3. 사료섭취량은 폐볏짚으로 대치한 구가 많이 섭취하였으나 처리구간에 유의성을 나타내지 않았다. 4. 사료효율에 있어서도 처리구간에 유의성은 없었다. 5. Amino 산의 조성에 있어서는 밀기울과 느타리버섯재배 폐볏짚과 비교한 바 methionine만이 0.01% 다량 함유되어 있었고 여타 amino산은 모두 소량 함유되어 있었다. 6. 폐볏짚의 사용량 증가를 위하여 6% 폐볏짚을 밀기울과 대치하고 메치오닌 혼합제를 첨가한 결과 증체량, 사료섭취량 및 사료효율에 있어서 유의성은 없으나 시험구가 대조구에 비하여 사료는 많이 섭취하고 사료효율은 낮아지는 경향을 보이고 있었다. 7. 경제성을 분석한 바 메치오닌 첨가구가 대조구에 비하여 kg당 생산원가 높아져 (P＜0.01) 6%까지 대치함은 경제성이 없음을 인지하게 되었다. 따라서 1, 2차시험 결과로 볼 때 폐볏짚에 의한 밀기울 대치는 4%가 한계라고 사료된다.