| Autor: |
José L. Figueroa-Velasco, David Trujano-San-Luis, José A. Martínez-Aispuro, María T. Sánchez-Torres, María M. Crosby-Galván, Agustín Ruíz-Flores, José L. Cordero-Mora |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Revista Colombiana de Ciencias Pecuarias, Vol 33, Iss 4, Pp 217-227 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2256-2958 |
| DOI: |
10.17533/udea.rccp.v33n4a02 |
| Popis: |
Background: Methionine (Met) requirements have not been clearly established for fattening pigs due to their metabolic interrelationships and its bioavailability for protein synthesis. Objective: To determine the optimum level of regular crystalline or protected Met in pig diets from nursery to finishing. Methods: A total of 48 crossbred pigs (11.74±1.72 kg of initial body weight) were used. The treatments consisted of adding four levels (0.00, 0.05, 0.10, 0.15% in addition to dietary content) and two types of Met (regular and protected) to pig diets. Results: Nursery, Finishing I, and II pigs fed protected Met increased daily feed intake (DFI; p≤0.10). Protected Met raised daily weight gain (DWG) in nursery pigs and increased backfat thickness (BT) in nursery and grower pigs (p≤0.10). In Finishing I pigs, protected Met increased DWG and improved carcass characteristics (p≤0.10). In nursery and grower pigs, an extra 0.15% Met decreased feed:gain ratio (FGR; p≤0.10). In grower and Finishing II pigs fed extra 0.05% Met improved DWG and extra 0.10% Met reduced plasma urea concentration (p≤0.10). Conclusions: Feeding protected Met in pig diets increases DWG, DFI and BT. Increasing 0.05-0.15% Met level improves FGR, DWG, potentially reducing nitrogen excretion to the environment. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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