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Effect of Dietary Crude Protein Reduction in Weaning Pigs
DC Field | Value | Language |
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dc.contributor.advisor | 김유용 | - |
dc.contributor.author | 이상욱 | - |
dc.date.accessioned | 2017-07-14T06:42:35Z | - |
dc.date.available | 2017-07-14T06:42:35Z | - |
dc.date.issued | 2014-08 | - |
dc.identifier.other | 000000021237 | - |
dc.identifier.uri | https://hdl.handle.net/10371/125865 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 농생명공학부, 2014. 8. 김유용. | - |
dc.description.abstract | This experiment was conducted to evaluate the effect of dietary crude protein reduction on growth performance, blood profiles, and nutrient digestibility in weaning pigs. A total of 128 crossbred piglets ([Yorkshire × Landrace] × Duroc), weaned at 21 ± 3 d of age with average initial body weight of 7.68 ± 0.2 kg were used in this experiment during 5 weeks. Weaning pigs were assigned to one of 4 treatments in a randomized complete block (RCB) design in 8 replicates with 4 pigs per pen. Control diet had same level of dietary crude protein as NRC (1998) recommended, and 2% of dietary crude protein was reduced from 2% to 6% less then NRC recommendation. Three phase feeding programs were used in this experiment (phase I, d 0 to 7 | - |
dc.description.abstract | phase II, d 7 to 21 | - |
dc.description.abstract | phase III, d 21 to 35). In growth performance, reduction of dietary crude protein resulted in decrease of growth performance, but 2% reduction of dietary crude protein treatment showed significantly same rows with control diet (P<0.05). Pigs fed control diet showed the highest serum blood urea nitrogen (BUN) concentration, but insulin-like growth factor-1 (IGF-1) level was decreased by dietary crude protein reduction (linear, P<0.05). Sixteen crossbred barrows (4 pigs per treatment) averaging 16.28 ± 1.82 kg body weight were alloted in apparent nutrient digestibility. Dry matter digestibility was increased by dietary crude protein reduction (linear, P<0.05 | - |
dc.description.abstract | quadratic P<0.01), and 4% reduction of dietary crude protein treatment showed significantly higher dry matter digestibility than other treatment (P<0.01). Four percent reduction of dietary crude protein treatment showed significantly power total nitrogen excretion than other treatment (P<0.01). Also, dietary crude protein digestibility was lowered by dietary crude protein digestibility (linear, P<0.05), and crude ash digestibility was increased by dietary crude protein reduction (linear, P<0.05 | - |
dc.description.abstract | quadratic, P<0.05). Crude fat digestibility showed some tendency of increased than decreased, and 4% reduction of dietary crude protein treatment showed the highest crude fat digestibility (quadratic, P=0.08). In nitrogen retention, fecal nitrogen was decreased by dietary crude protein reduction (linear, P<0.05), and also, urinal nitrogen showed decreased tendency by dietary crude protein reduction (P=0.067). Consequently, reduction of dietary crude protein level in weaning pig diet reduce growth performance, but improve nutrient digestibility. And 4% dietary crude protein reduction could be acceptable for commercial weaning pigs feed with considering impact of environmental pollution. | - |
dc.description.tableofcontents | Contents
page Summary i Contents iii List of Tables vi List of Figures viii List of Abbreviations ix Ⅰ. Introduction 1 Ⅱ. Review of Literature 3 1. Digestive Physiology of Young Pigs 3 1) Development of digestive enzymes 3 2) Changes of digestive physiology in weaning pigs 8 (1) Enzyme 9 (2) Gut morphology 9 2. Importance of Protein in Weaning Pigs 13 1) Dietary Protein content 13 2) Dietary protein source 14 (1) Soybean meal proteins 14 (2) Spray-dried animal plasma 15 (3) Dried skim milk 15 3) Protein metabolism 15 4) Somatotropin and insulin-like growth factor-I 17 5) Insulin 18 3. Amino Acid Utilization in Weaning Pigs 19 1) Substance of amino acid metabolism 19 2) Amino acid utilization for body deposition 23 3) Absorption 24 4) Nitrogen balance 26 4. Reduction of Nitrogen Excretion in Weaning Pigs 27 1) Legislation of nitrogen emission 27 2) Nutrition and nitrogen excretion 28 Ⅲ. Effect of Different Crude Protein Reduction on Growth Performance, Blood Characteristics, Nutrient Digestibility in Weaning Pigs 33 Abstract 33 Introduction 35 Material and Methods 36 Results and Discussion 41 Conclusions 45 Ⅳ. Literatures Cited 56 Ⅴ. Summary in Korean 64 Ⅵ. Acknowledgement 66 | - |
dc.format | application/pdf | - |
dc.format.extent | 1072925 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | ko | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Crude protein | - |
dc.subject | Nitrogen excretion | - |
dc.subject | Weaning pigs | - |
dc.subject | Growth performance | - |
dc.subject | Diarrhea | - |
dc.subject.ddc | 630 | - |
dc.title | Effect of Dietary Crude Protein Reduction in Weaning Pigs | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.citation.pages | 33 | - |
dc.contributor.affiliation | 농업생명과학대학 농생명공학부 | - |
dc.date.awarded | 2014-08 | - |
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