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볏짚의 사료가치 증진을 위한 적정 알카린 H2O2 처리 수준에 관한 연구
문양수(Y . S . Moon),하종규(J . K . Ha),고종열(J . Y . Ko),최연호(Y . H . Choy),조경훈(G . H . Cho),최윤재(Y . J . Choi),한인규(I . K . Han) 한국축산학회 1990 한국축산학회지 Vol.32 No.10
This study was carried out to determine the adequate levels of alkaline hydrogen peroxide treatment for the improvement of nutritive value of rice straw. In vitro digestibility and chemical analysis after several treatments were measured. Treatment variables were soaking time(12, 24, 48 and 96 hrs), temperature(5, 25, 50 and 75℃) of alkaline H₂0₂ solution, H₂0₂ concentration (0.5, 1, 2, 3 and 4%) and substrate /solution ratio (1, 2, 3, 4 and 5g/ml). The results obtained were summarized as follows. 1. The DM digestibilities or rice straw treated with H₂O₂ for 24 and 48 hours were higher than those of the others(p$lt;0.05). There was no differ ences when the rice straw was treated for 12, 72 or 96 hours. Cell wall contents were not affected by the time of treatment. 2. The DM digestibilities were higher at pH 11.5 or above(p$lt;0.05) and was decreased as pH declined. When rice straw was treated with H₂O₂ at pH 11.5 or higher, NDF, ADF and cellulose contents were increased. However, lignin content and DM recovery percentages were decreased. 3. The DM digestibilities were not influenced by the ratio of straw versus liquid. The contents of NDF and cellulose were not affected up to the ratio of 4g rice straw/50m1, but were decreased at 5g rice straw/50m1. Lignin content and DM recovery percentages, however, were increased at 5g rice straw /50m1. 4. The DM digestibilities were not different among treatments at 5, 25 and 50℃. However, the rice straw treated at 75℃ showed lowest digestibility of all treatment (p$lt;0.05). The content of NDF, ADF and cellulose was increased by increasing temperature. However, lignin content and DM recovery percentages were decreased by increasing temperature. 5. The AHP treated rice straw had higher content of ADF and cellulose, and lower content of hemicellulose and lignin as the concentration of H₂O₂, increased. But hemicellulose, lignin and DM recovery percentages were decreased. The NDF content was not different among five different concentrations of H₂0₂ solution. In conculsion, based upon the results of present experiments the most desirable method is to soak rice straw in 1% alkaline H₂0₂ solution at pH 11.5, at room temperatrve (25℃), for 24∼48 hours and at the ratio of 4g rice straw /50m1 solmtion.
韓牛 牝牛의 Body Condition Score가 繁殖形質에 미치는 影響
최성복,최연호,이지웅,백광수,김영근,손삼규,김내수 한국동물자원과학회 2004 한국축산학회지 Vol.46 No.1
Data from five Hanwoo breeding farms were collected to analyze the effects of parity, season, nutrition and reproduction on body conditions of heifers and cows and to analyze the relationships of body conditions with reproductive performances and body growth. Analytic models included farms and parity which were run through SAS to estimate least squares means and correlation coefficients between traits - body condition scores(BCS) of 1(very emaciated) through 9(very obese) scale at service and at calving, calving interval, days to rebreeding, gestation length, number of services per conception. Overall averages were 4.55 for BCS at service, 5.42 for BCS at calving, 406.7days of calving interval, 287.7days of gestation length, 66.2days from calving to first service and 1.78 times of services per conception. Number of services per conception was 1.50~1.74 times for the cows of BCS 5 or under and 2.00~3.00 for those of BCS 6 or higher. Body weight of calves from cows observed averaged 23.3㎏ at birth and 70.7㎏ at weaning. 57 percent of cows showed BCS 4~5 at service while 46 percent of those showed 5~6 at calving. Extimated phenotypic correlation coefficients of BCS at service with BCS at calving, calving interval, gestation length, number of services per conception were low but positive: 0.16, 0.26, 0.08 and 0.06, respectively. Phenotypic correlations of BCS at calving with calving interval, gestation length and number of services per conception were estimated to be also low and positive: 0.10, 0.13 and 0.10, respectively. However, phenotypic correlation between calving interval and gestation length, and between gestation length and number of services per conception were negative but low as - 0.11 and -0.13 each.