Production Performance of Single Comb White Leghorn Chickens Fed Growing Diets Containing Blood Meal and Supplemental Isoleucine
| Autor: | James Tyus, II, Samuel N. Nahashon, Nathaniel Adefope, Darren Wright |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | The Journal of Poultry Science, Vol 46, Iss 4, Pp 313-321 (2009) |
| Druh dokumentu: | article |
| ISSN: | 1346-7395 1349-0486 |
| DOI: | 10.2141/jpsa.46.313 |
| Popis: | Laying performance of Single Comb White Leghorn (SCWL) chicks fed diets containing blood meal supplemented with isoleucine from hatch to ten weeks of age (WOA) was evaluated. In 4 replicates, 480 SCWL chicks were fed corn-based diets whose protein sources were 100% soybean meal (control), 100% blood meal (BM), 50% soybean meal+50% blood meal (SMBM), and 50% alfalfa meal+50% blood meal (AMBM). These diets contained 2,900kcal metabolizable energy (ME) per kg and 20% crude protein (CP). Blood meal comprised 16.8, 11.0 and 14.3% of the dietary composition in BM, SMBM, and AMBM diets, respectively. At 11-14, 15-18 and 19-46WOA birds in all treatment groups were fed corn-soy based diets containing 3,000, 3,080 and 2,900kcal ME/kg and 17.5, 16.5, and 17% CP, respectively. The birds were provided a 23, 8, and 16 hr light regimen at 0-10, 11-14, and 15-46WOA, respectively. Feed and water were provided at free choice and mortality was recorded as it occurred. At first egg, birds were observed for age, body weight and egg weight. Thereafter hen-day egg production, egg weight, egg mass, egg grade, internal egg quality and egg shell thickness were measured over five 28-day laying periods. Birds fed BM diets had 6.08, 5.24 and 2.63% higher (P |
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