보고서 정보
주관연구기관 |
건국대학교 KonKuk University |
보고서유형 | 최종보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2016-02 |
과제시작연도 |
2015 |
주관부처 |
농촌진흥청 Rural Development Administration(RDA) |
과제관리전문기관 |
농촌진흥청 Rural Development Administration |
등록번호 |
TRKO201600003147 |
과제고유번호 |
1395039776 |
사업명 |
친환경안전농축산물생산기술 |
DB 구축일자 |
2016-06-25
|
DOI |
https://doi.org/10.23000/TRKO201600003147 |
초록
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Ⅳ. 연구개발결과
총 3년간의 연구를 통하여, 돼지의 성장단계에 따른 사료섭취량을 측정하였으며, 측정된 사료섭취량 및 데이터베이스를 수집하여 사료섭취량과 이에 영향을 미치는 요소들 간의 상관관계분석을 통해 가장 적절한 요소를 선택하여 통합적 사료섭취량 모델을 개발하였다. 각 돼지의 성장단계에서 사료내 표준회장가소화 라이신 농도의 증가가 사양성적에 미치는 영향을 측정하였으며, 실험 결과 데이터를 토대로 돼지의 성장단계에 따른 표준회장가소화 라이신 요구량을 결정하였다. 돼지의 각기 다른 성장단계에서 특정 사료에 대한 정미에너지 농
Ⅳ. 연구개발결과
총 3년간의 연구를 통하여, 돼지의 성장단계에 따른 사료섭취량을 측정하였으며, 측정된 사료섭취량 및 데이터베이스를 수집하여 사료섭취량과 이에 영향을 미치는 요소들 간의 상관관계분석을 통해 가장 적절한 요소를 선택하여 통합적 사료섭취량 모델을 개발하였다. 각 돼지의 성장단계에서 사료내 표준회장가소화 라이신 농도의 증가가 사양성적에 미치는 영향을 측정하였으며, 실험 결과 데이터를 토대로 돼지의 성장단계에 따른 표준회장가소화 라이신 요구량을 결정하였다. 돼지의 각기 다른 성장단계에서 특정 사료에 대한 정미에너지 농도를 측정하였고, 사료내 정미에너지 농도의 증가가 사양성적에 미치는 영향을 측정하였으며, 이 실험 결과 데이터를 토대로 돼지의 성장단계에 따른 정미에너지 요구량을 측정하였다. 연구들의 결과를 통합하여 돼지에서 표준회장가소화 라이신 농도 및 정미에너지의 요구량을 충족시키는 적절한 비율에 대한 연구가 이루어졌다.
Abstract
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Feed costs are generally 60% or more of the total cost of pig production. The prices of the feed ingredients for pigs have fluctuated yearly. In the case of Korea, it is necessary to reduce the feed cost as a large quantity of feed ingredients is imported from other countries. Feeding standards spec
Feed costs are generally 60% or more of the total cost of pig production. The prices of the feed ingredients for pigs have fluctuated yearly. In the case of Korea, it is necessary to reduce the feed cost as a large quantity of feed ingredients is imported from other countries. Feeding standards specialized for Korean swine production systems need to be developed as Korean Feeding Standard for Swine (2012) had been adapted largely from NRC (2012). Therefore, development of feed intake estimation for each growth stage of pigs and determination of the standardized ileal digestible lysine and net energy requirements under Korean swine production system are needed. These are core components for developing a cost-effective and environmentally-friendly swine industry. However, the information on the nutrient requirements for pigs in Korea is insufficient, and most of the requirement estimates are based on foreign research data. Therefore, modeling the individual feed intake for pigs in the different growth stages and estimating the standardized ileal digestible lysine and net energy requirements are very important for the sustainable swine production in Korea.
The present study was conducted 1) to determine growth performance and individual feed intake of pigs on different growth stages (nursery, growing, finishing, and sow), and 2) to develop model to predict integrated individual feed intake of pigs on different growth stages. Digestible energy contents in diets not affected to body weight (BW), average daily feed intake (ADFI), most of blood characteristics except mean corpuscular volume of nursery pigs, but average daily gain (ADG) and gain to feed ratio (G:F) linearly increased. However, digestible energy contents in diets linearly increased BW, ADG, G:F, and back fat depth of growing pigs, and not affected to blood characteristics. Digestible energy contents in diets linearly increased ADG and G:F of finishing pigs. Duroc was seen fast growth than Landrace and Yorkshir, and F1 (Landrace × Yorkshir) was seen fast growth than Landrace and Yorkshir. Individual feed intake of group-housed sows estimated from previous models had difference from measured values. There was significant correlation between individual feed intake of all growth stage of pigs and sex, breed, and BW. Based on these results regression equations were developed (Equation 1, Feed intake = 1,079 + 11.5BW; equation 2, feed intake = 906 + 128breed + 11.7BW; equation 3, feed intake = 919 - 392sex +284breed + 10.5BW)
The present study was conducted 1) to determine the standardized ileal digestible lysine (SID Lys) requirment in pigs, and 2) to determine the optimal SID Lys to net energy ratio in gestating sow. The SID Lys requirement for weanling pig, growing pig, and gestating sow were determined. The SID Lys requirement of weanling pig is 1.43% based on gain to feed ratio. For growing pig, the SID lys requirement ranged from 0.75 to 0.95% based on average daily gain. The SID Lys requirement of gestating sow in two gestation stage were 0.44 and 0.58% based on litter born alive, respectively. In addition, the optimal SID Lys to net energy ratio of gestating sow in each gestation stage are 1.64 g/Mcal and 2.48 g/Mcal, respectively. Based on the results of the current research, the concentration of SID Lys in feed ingredients can be used in swine diet formulation. In addition, the concentration of nitrogen in feces, which is one of the major pollutants originated from swine industry, can be reduced. The cost of pig production can also be reduced by using precise models developed in the present study.
The present study was conducted 1) to determine net energy (NE) requirement for young pigs, 2) to determine NE requirement for growing pigs, and 3) to invesigate the effects of differing SID Lys:NE in diets on pig performance. The average NE requirement for young pigs and growing pigs were 4,960 kcal and 6,914 kcal NE per kg of BWG, respectively. These requirement values were changed by NE concentrations of diets. We also predicted daily NE intake (kcal NE/day) as a function of pig BW. For young pigs, daily NE intake = 344.56 + (134.28 x BW), R2 = 0.796, whereas for growing pigs, daily NE intake = -1,449.7 + (126.6 x BW), R2 = 0.369. The predictability was relatively very low for growin pigs as compared to young pigs. In comparison of French NE vs. Dutch NE system, daily NE intake were predicted at the greater extent when Dutch NE system was adopted than when French NE system was adopted. Differing ratio of Lys to NE concentrations of diets from 3.77 to 4.23 g of SID ys/Mcal NE did not affect performance of growing pigs. Similar results were also observed for finishing pigs when they were fed diets containing differing ratio of Lys to NE concentrations of diets from 2.79 to 3.14 g of SID Lys/Mcal NE. Linear broken line analysis and quadratic analysis were also performed with data from finishing pigs. Linear broken line analysis revealed that the optimal SID:NE (g/Mcal) for finishing pigs was estimated to be 2.96 g/Mcal NE. This values were very close to the value for similar BW range of finishing pigs, as suggested by NRC(2012). However, quadratic analysis revealed that the optimal SID:NE (g/Mcal) was estimated to be 3.14 g/Mcal NE. Different prediction analysis methods showed different results. In conclusion, the results from this experiment can be used for swine diet formulation in Korea, and further, will be directly adopted for establishing Korean Feeding Standard for Swine. In addition, this experiment will provide the important database for future research developing swine NE system in Korea.
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