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鄭昌朝 제주대학교 1984 논문집 Vol.19 No.-
低質粗飼料의 飼料價値 增進을 위해 放射線照射의 效果를 試驗하였다. 보리짚,보리가락 및 油菜깍지를 供試하여 ??線源을 利用 0,2.5,5,10 및 25 Mrad를 照射하였다. 放射線照射水準은 Hemicellulose와 NDF의 組成分에 影響을 주어 高水準에서 그 含量이 減少되고 있었다. 放射線照射의 效果는 보리가락에서 Invitro 消化率을 높였으며, 10,25 Mrad 水準에서는 현저한 (P<0.01)消化率의 增加를 나타내었다. 다만,2.5, 5 Mrad照射는 各試料 모두 對照區에 비해 消化率의 減少現象을 보이고 있었다. 醱酵 48 時間에서 平均 Total VFA의 生成量은 보리가락과 油菜깍지가 가장 優勢하였으며,25Mrad水準은 모든 飼料의 VFA 生成量을 增加 시키고 있었다. C/C Ratio 는 高線量水準에서 3~5 時間에 가장 크게 나타났으며 그後 부터는 漸次 減少되고 있었다. Effects of Gamma irradiation on low quality roughage, to engance their potential nutritive value were examined. Barley straw,Barley husks and Rape hulls were irradiated with doses of 0,2.5,5,10 and 25 Mrad using ??Cosurce.Hemicellulose and Nutrural Detergent Fiber (NDF) content of tested materials were decreased by the higher irradiation dose,with 10 and 25 Mrad. Significant (P<0.01)increases in InVrtro D.M.disapperance ofbarley husks were altred by 10 and 25 Mrad doses but to a less estent the digestibility with other doses.Mean total V.F.A. production at 48 hours fermentation was highest in Barley husks and Rape hulls.25 Mrad dose increased increased the V.F.A. concentration in all materials tested. Higher doses also improved the acetic and propionic ratio (C₂/C₃)at 3-5 hours fermentation, this ratio gradually decreased thereafter
정창조,오태광,김판경,김문철 濟州大學校 農科大學 動物科學硏究所 1997 動物科學論叢 Vol.12 No.1
Five commerdy avatlable probiotics or yeast culture were compared with the performance of growing-hhgpigs and odorgenerating substances in the feces. Total of 240 pigs were used for group feedig trial for 80 days with 6 treatments(T0 : Control, T1 : DS Cleaner 1 kgl 1 ton feed, T2 Atapon 0.5 kg/l ton feed, T3 : Bio-pro 1 kgl 1 ton feed, T4 : Photoplus 1 kg/ 1 ton feed and T5 CYC 2000, 5 kg/ 1 ton feed). Each treatment has 20 pigs with two replicates. At the end of trial 7 pigs from each treatment were slaughtered for carcase quality evaluation. Fecal nitrogen, ammonia nitrogen, VFA concentration and pH were analysed as a indicator of ordorgenerahg substance. The bactenal counts in the feces and acid resstance and enzyme activity of isolated bacteria were also evaluated. Average body weght at D-70 were T1: 97.46 kg, T3 : 95.18 kg, T2 : 94.44 kg and T4 : 93.49 kg, sgruficantly(p<O.05) higher body weights were obtained in probiotic feeding group than the control. However, there was no significant difference in feed intake and feed converjlon between treatments. Backfat thickness were Sgnficantly(p<O.05) affected by probiotic or yeast culture feeding, lowest backfat was in Tl(15.29 mm) and higher backfat were found in probiotic feedug group than the control. Total bactenal counts in feces were in the range of 10^(7)-10^(8) cfu/g in the first week of tnal but was gradually decreased by 106-107 at the end of experiment. Number of coliform bactenal cell was not in the other group. Total nitrogen, ammonia nitrogen and total VFA umcentration in the feces were decreased in all treatment during probiotic feeding period. Total nitrogen concentration were decreased by 68.28% in T1, 60.19% in T4, 45.63% in the control, 38.99% in T2, 31.83% in T5 and 18.10% in T3 when compared between week 1 and week 10. Fecal ammonia nitrogen concentration also expressed the similar pattern of total nitrogen. Bactenal enzyme activity and the add resistance capability of bacteria which were cultured from commercial probiotics were also evaluated.