Norsvin Furnesveien 223, 2319, Hamar, Norway.
Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences 1432, Ås, Norway.
Food Sci Nutr. 2015 Mar;3(2):120-8. doi: 10.1002/fsn3.182. Epub 2014 Dec 3.
The concentration of omega-3 fatty acids and selenium (Se) is generally too low in the Western diet. But as the nutrient composition of pork meat and adipose tissue is influenced by the feed given to the animals, the product can be changed to support nutrient demands. Half (297/594) the pigs were given a feed concentrate based on low-glucosinolate rapeseed products (RS), while the other half was fed a traditional concentrate (Contr): The RS feed had an omega-6/omega-3 ratio of 3.6:1, and the Contr feed had a ratio of 8.9:1, and both feeds were supplemented with 0.4 mg Se/kg (organic Se: inorganic Se, 1:1). There was a small difference in growth rate, but no differences in feed conversion ratio, lean meat percentage, carcass value, and margin per pig for the two groups. There were no differences in meat quality between the two groups, but there were differences in technological fat quality. The RS pigs contained about 2 times more alpha-linolenic acid in the backfat and 41% more in the meat (M. longissimus dorsi) compared to the controls. The concentration of EPA, DPA, and DHA were 42% and 20% higher in backfat and meat of the RS pigs compared to the control pigs respectively. The ratio between omega-6/omega-3 fatty acids were 4.7 in the meat and 4.0 in the backfat in the RS pigs, and the corresponding values were 6.6 and 8.0 in the control pigs. The selenium content was 0.3 mg/kg meat in both groups. The study showed that a portion of the present pig meat (175 g) provided the daily recommended intake of Se for men and women and about 1/6 of proposed reference intake of omega-3 LCPUFA (250 mg/day) to reduce the risk of CVD thereby providing a meat that is somewhat healthier for the consumer.
ω-3 脂肪酸和硒 (Se) 的浓度在西方饮食中通常很低。但是，由于猪肉和脂肪组织的营养成分受到动物饲料的影响，因此可以改变产品以满足营养需求。一半（297/594）的猪被喂食基于低硫代葡萄糖苷油菜籽产品（RS）的饲料浓缩物，而另一半则被喂食传统浓缩物（对照）：RS 饲料的 ω-6/ω-3 比例为 3.6:1，而对照饲料的比例为 8.9:1，并且两种饲料都补充了 0.4 mg/kg（有机硒：无机硒，1:1）。两组猪的生长速度略有差异，但饲料转化率、瘦肉百分比、胴体价值和每头猪的利润没有差异。两组猪的肉质没有差异，但在技术脂肪质量方面存在差异。RS 猪的背脂中 α-亚麻酸含量比对照组高约 2 倍，肌肉（长肌背最长肌）高 41%。EPA、DPA 和 DHA 的浓度在 RS 猪的背脂和肌肉中分别比对照猪高 42%和 20%。RS 猪的 ω-6/ω-3 脂肪酸比例分别为 4.7 和 4.0，对照猪的相应值分别为 6.6 和 8.0。硒含量在两组中均为 0.3mg/kg 肌肉。研究表明，目前一部分猪肉（175 克）提供了男性和女性的每日推荐硒摄入量，以及大约 1/6 的建议ω-3 LCPUFA 参考摄入量（250mg/天），以降低 CVD 的风险，从而为消费者提供更健康的肉类。
