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볏짚의 사료가치 증진을 위한 요소수용액의 처리기간과 저장온도에 관한 연구
고영두,김재황,유성오,류영우,강한석,송영민,김두환 ( Y . D . Ko,J . H . Kim,S . O . Yoo,Y . U . Ryu,H . S . Kang,Y . M . Song,D . H . Kim ) 한국축산학회 1997 한국축산학회지 Vol.39 No.3
This experiment was carried out to enhance the feed value of rice straw and utilization of urea as ruminant feedstuffs. The test animals were alloted depending upon three different treatment periods(7, 14 and 21 days), three different temperature(10, 20 and 30~), and two different urea concentration(5% or 10%) with 30% urea solution in the rice straw. The treated rice straw was then sun-dried, and the chemical composition of the treated rice straw was analyzed. Also, 0.2% pepsin-HCl solution and 2.5% cellulase were used to determine the in vitro dry matter digestibility. Eight Corriedale sheep(about 40 ㎏, ♂) were used to determine the NH,-N and palatability. Crude protein content of 5% level treatment with 30% urea solution was significantly(P$lt;0.05) increased in the treatment periods of 14 day and 21 day. NDF content did not significantly(P$gt;0.05) differ among treatment periods without regard to 5% or 10% level treatments with 30% urea solution, but ADF content of 21 day treatment period with 5% level and 7 day treatment period with 10% level was significantly(P$lt;0.05) lower than those of other treatment periods. Total N content did not significantly(P$gt;0.05) differ among Treatment periods, but NH₃-N content of the treatment with 10% level tended to be decreased depend on increasing with treatment periods. In vitro DDM of 5% or 10% treatment levels with 30% urea solution tended to increase in the treatment period of 7 day. Palatability of 5% or 10% levels with 30% urea solution did not differ(P$gt;0.05) among treatment periods. Crude protein content of 30℃ storage temperature with 5% or 10% levels was significantly(P$lt;0.05) higher than that of the other storage temperature, NDF and ADF contents did not significantly(P$gt;0.05) differ among storage temperature with 5% or 10% levels. Total N content did not significantly(P$gt;0.05) differ among storage temperature. But NH₃-N content of 10℃ storage temperature with 5% level was significantly (P$lt;0.05) higher than that of the other storage temperature. In vitro DDM of 5% treatment levels with 30% urea solution was significantly(P$lt;0.05) increased in the treatment with 30℃ storage temperature, but palatability of 5 or 10% treatment levels with 30% urea solution did not significantly(P$gt;0.05) differ among storage temperature.
면양에 있어서 숫 - 계분 Silage 의 영양소 함량 , 소화율 , 질소출납 및 기호성
류영우 ( Y W Ryu ),고영두 ( Y D Ko ),구재윤 ( J Y Koo ),김재황 ( J H Kim ),유성오 ( S O Yoo ),이희석 ( H S Lee ) 한국축산학회 1995 한국축산학회지 Vol.37 No.2
This study was carried out with the purpose to utilize cage layer manure (CLM). Sorghum was ensiled with 30% CLM(sorghum-manure silage, based on dry matter of sorghum) and without CLM(sorghum sire), and the chemical quality of the silages were estimated. Also four sheep(average weight of about 40.6 ㎏) were used to determine the effect of the digestibility, nitrogen balance and voluntary feed intake. Crude protein content of CLM (31.3%) was about 5 times as high as that of sorghum(6.1%). Dry matter and crude protein contents were increased(P$lt;0.05) by supplementation with CLM, while NDF, ADF and gross energy contents were decreased(P $lt;0.05). CLM silage was higher(P$lt;0.05) in pH, total VFA, propionic acid, butyric acid, lactic acid to total acid and NH₃-N to total N. There were no differences in contents of lactic acid between the two silages. Digesdbilities of crude protein, NDF and ADF were significantly (P$lt;0.05) higher in CLM silage. Nitrogen intake, fecal and urinary nitrogen were significantly(P$lt;0.05) higher in CLM silage, but (here were no differences in contents of retained nitrogen between the two silages. Dry matter intake of CLM silage(95.7 g) were significantly (P$lt;0.05) higher than sorghum silage(79.9 g).