Browsing Animal & Grassland Research & Innovation Programme by Subject "Rearing system"
Now showing items 1-2 of 2
The duration of the outdoor rearing period of pigs influences Iberian ham characteristicsThe effect of outdoor rearing duration (75 v 50 days) and rearing system (outdoor v indoor based systems) of Iberian pigs on the chemical composition (fatty acid composition of fat and intramuscular fat, moisture, salt, pigment concentrations and water activity of lean meat), the instrumental colour (CIEL*a*b* system) and the sensory characteristics (descriptive analysis) of dry-cured hams were investigated. The fatty acid composition of subcutaneous fat was weakly affected by outdoor rearing duration, but greatly affected by rearing system with the indoor hams showing larger proportion of saturated fatty acids than outdoor rearing. Rearing system also affected L* of subcut aneous fat (the indoor hams were lighter than the outdoor ones). The instrumental colour of lean was only affected by outdoor rearing duration (scores for a* and its derived variables were larger in the long-outdoor group than in the short-outdoor one). The effect of outdoor rearing duration on the sensory characteristics of Iberian hams was marked, 13 sensory characteristics being affected. Among them, odour intensity, flavour intensity, and flavour persistence were greater in the long-outdoor hams than in the short-outdoor ones, whereas these characteristics were not affected by rearing system. However, rearing system also had a large effect influencing 12 sensory characteristics.
Improvement of dry-cured Iberian ham sensory characteristics through the use of a concentrate high in oleic acid for pig feedingThe aim of this study was to investigate the sensory characteristics of dry-cured hams from confined Iberian pigs fed on a high oleic (HO) concentrate (HO-Pienso hams), and to study how different the characteristics of these hams are from those of Iberian hams from the best grade (Montanera hams, from extensively reared pigs). Nearly half of the fatty acids studied were similar in HO-Pienso and Montanera hams. No differences were found for 18:1, but some major fatty acids of subcutaneous fat of Iberian hams were different between the HO-Pienso and the Montanera hams (C16:0, C18:0, C18:2). The descriptive test revealed that 15 of the 23 sensory characteristics were not significantly different between both groups of hams. No sensory differences appeared for fat appearance or lean texture characteristics, but lean appearance, oiliness, saltiness and the most intensively perceived characteristics of odour and flavour were significantly different. These differences in the sensory traits between Montanera and Pienso hams were not as marked as found in previous studies. Therefore, the use of a concentrate high in oleic acid enables simulation, at least in part, of the sensory characteristics, especially texture.