Cottonseed oil in diets for growing broilers
| Autor: | Edna Teles dos Santos, Vânia de Sousa Lima Aguiar, J. B. Lopes, Danilo Rodrigo Silva e Silva, D.C.N. Nascimento, Leilane Rocha Barros Dourado, Leonardo Atta Farias, Luciana Pereira Machado |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
040301 veterinary sciences
Feed conversion ratio Ferrous 0403 veterinary science Iron salts chemistry.chemical_compound Animal science medicine Sulfate Completely randomized design Organ weight Cottonseed oil lcsh:SF1-1100 Chemistry business.industry poultry digestive oral and skin physiology 0402 animal and dairy science 04 agricultural and veterinary sciences 040201 dairy & animal science gossypol Biotechnology vegetable oil Animal Science and Zoology lcsh:Animal culture medicine.symptom business Weight gain |
| Zdroj: | Revista Brasileira de Zootecnia, Vol 45, Iss 5, Pp 208-218 (2016) Revista Brasileira de Zootecnia, Volume: 45, Issue: 5, Pages: 208-218, Published: MAY 2016 Revista Brasileira de Zootecnia v.45 n.5 2016 Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ |
| ISSN: | 1806-9290 |
| Popis: | The objective of this study was to evaluate the effect of three levels of crude cottonseed oil on performance, organ weights, and blood parameters of growing broilers. Carcass and cut yields after 33 and 42 days of age and the economic viability of the diets were also evaluated. Male broilers of the Ross line were distributed in a completely randomized design, in a 4 × 2 factorial arrangement (0, 2, 4, and 6% inclusion of cottonseed oil, with and without ferrous sulfate) with five replicates. In the period from 22 to 33 days, quadratic and increasing linear effects were observed on feed intake and weight gain, respectively. Feed conversion during the same period was better with the addition of ferrous sulfate. The addition of ferrous sulfate caused a reduction in heart weight. From 22 to 42 days, carcass and cuts yield, organ weight, and intestine length were not influenced by the levels of oil or by the addition of ferrous sulfate. Supplementation with iron salts provided a lower red blood cell count and increased mean cell volume. Balanced diets formulated with up to 6% of crude cottonseed oil for broilers from 22-33 and 22-42 days of age do not affect their performance or the weight of their organs. Supplementation with ferrous sulfate improved feed conversion up to 33 days. Diets formulated with 4% cottonseed oil supplemented with ferrous sulfate are economically viable in the period from 22 to 42 days. |
| Databáze: | OpenAIRE |
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