Effectiveness and optimum level of protected methionine in fattening pig diets

Revista Colombiana de Ciencias Pecuarias

Agustín Ruíz-Flores¹  José L. Cordero-Mora²  María T. Sánchez-Torres²  David Trujano-San-Luis²  José L. Figueroa-Velasco²  José A. Martínez-Aispuro²  María M. Crosby-Galván² 

[1] Chapingo Autonomous University;Colegio de Postgraduados;

关键词: bioavailability;    carcass traits;    growthperformance;    nutrient requirements;    pig;    protected methionine;    protein;    swine;    synthetic amino acids;    urea;   

DOI  :  10.17533/udea.rccp.v33n4a02

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown