건조 남은음식물 급여가 육성돈과 비육돈의 생산성에 미치는 효과

Effects of Feeding Dried Leftover Food on Productivity of Growing and Finishing Pigs

육성돈 시험은 평균체중이 약 22 kg 내외인 3원교잡종 ($Yorkshire{\times}Landrace{\times}Duroc$) 75두를 공시하여, 건조 남은음식물 무첨가구 (Control), 25%, 50% 첨가구와 사료내 단백질 함량을 10% 보강한 건조 남은음식물 25% 첨가구 및 단백질 함량을 20% 보강한 건조 남은음식물 50% 첨가구 등 총 5개 처리구로 하여 60일간 사양시험을 실시하였다. 육성돈의 일당증체량은 대조구가 모든 처리구중에서 가장 높았으나 건조 남은음식물 25% 첨가구와는 차이가 없었다 (P>0.05). 사료섭취량은 건조 남은음식물 첨가구가 대조구에 비해 다소 낮았으나 큰 차이는 없었고, 건조 남은음식물 첨가구중에서는 단백질을 20% 보강한 건조 남은음식물 50% 첨가구의 사료섭취량이 유의적으로 높았다 (P<0.05). 사료요구율은 처리간에 유의적인 차이는 없었으나, 건조 남은음식물 25% 첨가구가 다소 개선되는 경향이었다. 비육돈 시험은 평균체중이 약 70 kg 내외인 3원교잡종 ($Yorkshire{\times}Landrace{\times}Duroc$) 75두를 공시하여 49일간 사양시험을 실시하였으며, 처리내용은 육성돈의 시험과 같다. 비육돈의 일당증체량은 대조구에 비해 건조 남은음식물 첨가구가 유의적으로 낮았으나 단백질을 10% 보강한 건조 남은음식물 25% 첨가구는 대조구와 차이가 없었다 (P>0.05). 사료섭취량은 대조구에 비해 건조 남은음식물 첨가구가 유의적으로 감소하였으나 단백질을 보강한 건조 남은음식물 첨가구는 대조구와 차이가 없었다 (P>0.05). 사료요구율은 단백질 함량을 10% 보강한 건조 남은음식물25% 첨가구가 가장 낮았으나 대조구와는 차이가 없었고, 50%첨가구는 유의적으로 높았다 (P<0.05). 도체중은 건조 남은음식물의 첨가수준이 증가할수록 낮아지는 경향이었으며, 도체율, 등지방두께 및 도체등급은 처리간에 차이가 없었다. 비육돈의 1 kg 증체당 사료비는 단백질 함량을 10% 보강한 건조 남은음식물 25% 첨가구가 가장 적게 소요되었다.

These studies were conducted to investigate the effects of feeding dried leftover food (DLF) on growth, feed conversion and carcass characteristics of growing and finishing pigs. In experiment 1, seventy-five three-way cross-hybrids ($Yorkshire{\times}Landrace{\times}Duroc$) pigs weighing approximately 22 kg of body weight on average were assigned to five treatments in a completely randomized design. Each treatment had three replications with five pigs per replication. All pigs were fed experimental diets for 60 days. In experiment 2, seventy-five three-way cross-hybrids pigs weighing approximately 70 kg of body weight were fed experimental diets for 49 days. Each treatment had three replications with five pigs per replication. The treatments included 1) group offered control diet without DLF, 2) group offered diet containing DLF at 25%, 3) group offered diet containing DLF at 50%, 4) group offerred diet containing DLF at 25% with 10% higher protein level and 5) group offerred diet containing DLF at 50% and 20% higher protein level. Average daily gain of growing pigs was highest in control group among all the treatment groups except group offered diet containing DLF at 25% with no significant difference (P>0.05). Feed intake of DLF-offered groups were lower than that of control group while feed intake of groups fed diets containing DLF at 50% with 20% higher protein level was significantly higher (P<0.05) than that of control group. Feed conversion of growing pigs was not significantly different amont treatments although it seemed to be slightly improved in groups fed diets containing DLF at 25%. Average daily gain of finishing pigs fed diets containing DLF was significantly lower than that of control group. However there was no significant differences in average daily gain between groups fed diets containing DLF at 25% with 10% higher protein level and control group (P>0.05). Feed intakes were significantly decreased in DLF-fed groups compared to control group while there was no significant differences in feed intake between groups fed diets containing DLF with 10% and 20% higher protein levels and control group (P>0.05). Feed conversion was lowest in groups fed diets containing DLF at 25% with 10% higher protein level. However, there were no significant differences in feed conversion between groups fed diets containing DLF at 25% with 10% higher protein level and control group. Feed conversion of groups fed diets containing DLF at 50% was significantly higher than that of control group (P<0.05). Carcass weight was decreased with increasing levels of DLF in the diets. There were no significant differences in dressing percentage, backfat thickness and carcass grade among treatments. Feed cost per 1 kg body weight gain of finishing pigs was lowest in groups fed diets containing DLF at 25% with 10% higher protein level.