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계분과 당밀을 첨가한 볏짚 Silage 의 품질과 사료적 가치 1 . Silage 의 발효 품질
고영두(Y . D . Ko),송영민(Y . M . Song),곽종형(C . H . Kwack),김두환(D . H . Kim) 한국축산학회 1991 한국축산학회지 Vol.33 No.3
This study was carried out to increase nutritional value of rice straw as a ruminant roughage. Rice straw with different formular of broiler manure and liquid molasses was ensiled and evaluated by laboratory method. Rice straw was mixed at three levels of broiler manure(20, 30 and 40%, w/w) and with three levels of molasses(0, 5 and 10%, w/w). To evaluate the characteristics of silage fermentation, effects of broiler manure and molasses on chemical composition, pH, nitrogen contents, fermentation acids and microflora of the silage were measured. The results obtained are summarized as follows; 1. In the silages without molasses, crude protein, ether extract, NDF, ADF, total-N, acetic acid and lactic acid were decreased as the level of broiler manure was increased, while pH, crude fiber, NFE, NH₃-N and butyric acid were increased. 2. In the silages with both broiler manure and molasses, the contents of crude protein and ether extract were increased as the broiler manure and molasses were increased up to 40% and 5%, respectively, while the contents of crude fiber and NFE were decreased. With the silage with higher level of molasses, contents of NDF, ADF, acetic acid, lactic acid and total-N were increased, while the contents of moisture, butyric acid and NH₃-N were decreased. 3. Significant correlation coefficients were found between crude protein and NH₃-N (r=-.60**), crude protein and pH (r=-.82*), crude protein and lactic acid (r=.82**), crude protein and acetic acid (r=.53**), NH₃-N and lactic acid (r=-.63**), NH₃-N and acetic acid (r=-.48*), pH and lactic acid (r=-.82**), pH and acetic acid (r=-.55**), and pH and NH₃-N (r=.87**). 4. In order to estimate crude protein (Y^_ep), lactic acid (Y^_L) and pff (Y^_PH) with the levels of broiler manure (X1) and the levels of molasses (X2), the following multiple regression equations were drawn; Y^_cp = 11.236 + .047 X1 + .563 X2 (R²=.547 with X1, .549 with X2) Y^_L = 1.992 - .019 X1 + .310 X2 (R²=.794 with X1, .790 with X2) Y^_PH = 4.290 - .033 X1 - .127 X2 (R²=.619 with X1, .493 with X2) 5. The silages with broiler manure and molasses produced 10^5-6 cells/g silage total viable bacteria and 10^8-9 cells/g silage lactic acid bacteria. The numbers of both bacteria were increased ss the level of broiler manure and molasses were increased. The silages without molasses produced 10²cells/g silage coliform bacteria. However. the number of coliform bacteria was negative in the silages with molasses.
RF Magnetron Sputtering으로 제작된 MnSbPt 합금박막의 자기광학적 성질
송영민(Y. M. Song),이경재(K. J. Lee),김종오(C. O. Kim) 한국자기학회 1996 韓國磁氣學會誌 Vol.6 No.2
The effects of annealing after deposition on the magnetic and magneto-optical properties of MnSbPt thin films prepared by rf sputtering were investigated. The MnSbPt alloy thin films were annealed in a vacuum with 10^(-5) Torr and the air, respectively, as a function of temperature and time. The films annealed at 300℃ for 4 hours was found to have the highest value of the saturation magnetization. The films annealed in the air did not show any thermal degradations, which indicates their chemical stability for the magneto-optical recording process. It was revealed that the Mn₄₃Sb_(46)Pt₁₁ films annealed at 300℃ for 4hours in a vacuum with 10^(-5) Torr exhibit high Kerr rotation angle of 0.8° for the incident wavelength of 550㎚, which is ascribed to the increase of the volume ratio of C1b phase. However, similar to the PtMnSb alloy thin films, these films are still horizontally magnetized and have the coercive field less than 400 Oe.
계분과 당밀을 첨가한 볏짚 Silage 의 품질과 사료적 가치 2 . Silage 의 소화율과 기호성
고영두(Y . D . Ko),송영민(Y . M . Song),강한석(H . S . Kang),김두환(D . H . Kim) 한국축산학회 1991 한국축산학회지 Vol.33 No.3
This study was carried out to increase the feeding value of rice straw, . ensiling with broiler manure and molasses. The silage formulated with 100% rice straw, 20, 30, and 40% broiler manure and 5% molasses was fermented in plastic silo for 60 days. To evaluate feed values, palatability and digestibility of rice straw silage were determined in a feeding trial with 6 male sheep(Corridal). The results obtained are summarized as follows ; 1. Dry matter, crude protein and crude ash contents were increased when the level of broiler manure was increased in the silage, but crude fibre and NFE were decreased. 2. The crude protein digestibility of the silage with broiler manure and molasses was increasd. and DCP was the highest in the silage with 40% broiler manure. 3. Daily intake of nitrogen for sheep was the highest in the silage containing 30% broiler manure. and daily dry matter intake per metabolic body weight was the highest in the 20% broiler manure silage(p$lt; .05). 4. Palatability and dry matter intake were the best in broiler manure 20%.
볏짚의 사료가치 증진을 위한 요소수용액의 처리기간과 저장온도에 관한 연구
고영두,김재황,유성오,류영우,강한석,송영민,김두환 ( Y . D . Ko,J . H . Kim,S . O . Yoo,Y . U . Ryu,H . S . Kang,Y . M . Song,D . H . Kim ) 한국축산학회 1997 한국축산학회지 Vol.39 No.3
This experiment was carried out to enhance the feed value of rice straw and utilization of urea as ruminant feedstuffs. The test animals were alloted depending upon three different treatment periods(7, 14 and 21 days), three different temperature(10, 20 and 30~), and two different urea concentration(5% or 10%) with 30% urea solution in the rice straw. The treated rice straw was then sun-dried, and the chemical composition of the treated rice straw was analyzed. Also, 0.2% pepsin-HCl solution and 2.5% cellulase were used to determine the in vitro dry matter digestibility. Eight Corriedale sheep(about 40 ㎏, ♂) were used to determine the NH,-N and palatability. Crude protein content of 5% level treatment with 30% urea solution was significantly(P$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.