Academic Journal
Influence of standardized ileal digestible tryptophan:lysine ratio on growth performance of 13- to 21-lb nursery pigs (2011)
| العنوان: | Influence of standardized ileal digestible tryptophan:lysine ratio on growth performance of 13- to 21-lb nursery pigs (2011) |
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| المؤلفون: | Nitikanchana, S, Nemechek, J E, Usry, J, Tokach, Michael D, DeRouchey, Joel M, Goodband, Robert D, Nelssen, Jim L, Dritz, Steven S |
| المصدر: | Kansas Agricultural Experiment Station Research Reports |
| بيانات النشر: | New Prairie Press |
| سنة النشر: | 2011 |
| المجموعة: | New Prairie Press - Open Access Scholarly Journals |
| مصطلحات موضوعية: | Swine Day, Kansas Agricultural Experiment Station contribution, no. 12-064-S, Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service), Swine, Amino acid ratio, Lysine, Tryptophan, Nursery pig, Other Animal Sciences |
| Time: | 2011, 1056 |
| الوصف: | A total of 255 nursery pigs (PIC 327 × 1050, initially 13.8 lb and 3 d postweaning) were used in a 28-d growth trial to determine the minimum standardized ileal digestible (SID) tryptophan:lysine ratio for 13- to 21-lb pigs. A 2-phase diet series was used with treatment diets fed from d 0 to 14 and a common diet fed from d 14 to 28. The 6 SID tryptophan:lysine ratios were 14.7, 16.5, 18.4, 20.3, 22.1, and 24.0%. Pigs were allotted on d 3 after weaning with 6 or 7 pigs per pen and 7 replications per treatment. Weight and feed disappearance were determined on d 0, 7, 14, 21, and 28 to calculate ADG, ADFI, and F/G. From d 0 to 14, increasing SID tryptophan:lysine ratio improved ADG (linear, P = 0.02) and generated a tendency for improved ADFI and F/G (linear, P = 0.06 and quadratic, P = 0.08, respectively). Although ADG and ADFI were linear, the greatest response was observed at a SID tryptophan:lysine ratio of 20.3%. From d 14 to 28, when the common diet was fed, ADFI increased (linear, P = 0.05) as SID tryptophan:lysine ratio increased in the previous period, but no differences were found in ADG and F/G. For the overall trial (d 0 to 28), ADG and ADFI increased (linear, P = 0.02 and P = 0.03, respectively) with increasing SID tryptophan:lysine ratio, with the greatest response observed at 20.3%. Feed/gain was unaffected by SID tryptophan:lysine ratio. Thus, the optimal SID tryptophan:lysine ratio for 13- to 21-lb nursery pigs in this study appears to be at least 20.3%. This ratio is greater than the minimum ratio currently using in many practical diet formulations in the United States, indicating an importance of tryptophan in diet formulation of low-protein amino acid-fortified diets in the swine industry.; Swine Day, Manhattan, KS, November 17, 2011 |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | https://newprairiepress.org/kaesrr/vol0/iss10/1298; https://newprairiepress.org/context/kaesrr/article/7138/viewcontent/Swine11pg138_144.pdf |
| DOI: | 10.4148/2378-5977.7138 |
| الاتاحة: | https://newprairiepress.org/kaesrr/vol0/iss10/1298 https://doi.org/10.4148/2378-5977.7138 https://newprairiepress.org/context/kaesrr/article/7138/viewcontent/Swine11pg138_144.pdf |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.53D5E76E |
| قاعدة البيانات: | BASE |
| DOI: | 10.4148/2378-5977.7138 |
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