摘要
以亚硒酸钠为对照,研究了纳米硒对肥育猪肌肉品质的影响.234头体重45kg左右的杜长大肥育猪按饲养试验要求分为13组,每组3个重复,每个重复6头.将纳米硒和亚硒酸钠2种硒源分别以0.10、0.20、0.30、0.40、0.50、1.00mg/kg6个硒水平添加到基础日粮中,配制成12种试验日粮,基础日粮作对照.结果显示①亚硒酸钠添加浓度在0～0.20mg/kg,背最长肌滴水损失随着硒添加浓度的增加而降低;添加浓度在0.30～1.00mg/kg,滴水损失随着硒添加浓度的增加而升高;1.00mg/kg硒添加水平滴水损失显著高于0.20～0.50mg/kg硒添加水平(P<0.05).纳米硒添加浓度在0.20～1.00mg/kg滴水损失始终保持在低峰平台.硒源添加浓度在0.40～1.00mg/kg硒时,纳米硒组滴水损失显著低于亚硒酸钠组(P<0.05).②硒源添加浓度在0.10～0.30mg/kg时,两种硒源对背最长肌GSHPx活性、TAOC和MDA含量的影响无显著差异(P>0.05);硒源添加浓度在0.40～1.00mg/kg硒时,纳米硒组GSHPx活性和TAOC显著高于亚硒酸钠组(P<0.05),MDA含量显著低于亚硒酸钠组(P<0.05).③硒源添加浓度在0.10～0.30mg/kg时,两种硒源对背最长肌硒含量的影响无显著差异;在0.40～1.00mg/kg硒添加水平上,纳米硒组背最长肌硒含量显著高于亚硒酸钠组.④空白组背最长肌肌红蛋白含量显著低于加硒组(P<0.
A total of 234 finishing pigs (Duroc×Landrance×Yorkshire) were used to investigate the effects of nano elemental selenium (Nano-Se) or sodium selenite (Na_2SeO_3) on meat quality. The pigs were allocated to 13 treatments, each of which had 3 pens of 6 pigs per pen. Of the 13 treatments, one was the treatment in which the pigs were feeded with basal diet containing 0.046 mg/kg Se and served as control. Pigs in each of six experimental treatment were given, besides basal diet, 0.10, 0.20, 0.30, 0.40, 0.50 or 1.00 mg/kg supplemental Se in the form of Na_2SeO_3 and pigs in each of the other six experimental treatments were given the same concentration range of supplemental Se in the form of Nano-Se. The results were as follows: (i) When Na_2SeO_3 was added to the diet, drop loss of muscle decreased with the concentration of Se at the concentration range of 0-0.20 mg/kg and increased at the range of 0.30-1.00 mg/kg Se. Supplementation with 1.00 mg/kg Se as Na_2SeO_3 increased (P<0.05) drop loss as compared with the addition of Se in the concentration range of 0.20-0.50 mg/kg. When Nano-Se was added to the diet, drop loss remained steady at the peak value even at a concentration of 1.00 mg/kg Se. The pigs had lower (P<0.05) drop loss in the concentration range of 0.40-1.00 mg/kg as Nano-Se than as Na_2SeO_3. (ii) There were no significant difference in activities of glutathion peroxidase(GSH-Px), total antioxidative competence (T-AOC) and malondialdehyde (MDA) of muscle between the treatments of Nano-Se and Na_2SeO_3 when the added concentration of Se was 0.10-0.30 mg/kg. The pigs had higher (P<0.05) GSH-Px and T-AOC activities and lower (P<0.05) MDA activity in the concentration range of 0.40-1.00 mg/kg as Nano-Se than Na_2SeO_3. (iii) There were no difference in Se content of muscle between the treatments of Nano-Se and Na_2SeO_3 when the added concentration of Se was 0.10-0.30 mg/kg. The pigs had higher (P<0.05) Se content of muscle in the concentration range of 0.40-1.00 mg/kg supplied as Nano-Se than as Na_2SeO_3. (iv) Supplentation with Se increased the myoglobin content of muscle, however, the extent of increase was not affected by Se sources or the added concentration of Se. The results implicated that the optimal concentration range of Weinberg curve for Nano-Se is wider than that for Na_2SeO_3 and supplentation with high level of Nano-Se improved the antioxidant capacity, decreased drop loss and increased Se content of muscle as compared with Na_2SeO_3.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2005年第3期263-268,共6页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
浙江省自然科学基金资助项目(M303435)
浙江省教育厅资助项目(20040175)
国际科学基金资助项目(B/34521).
关键词
纳米硒
肉质
肥育猪
Nano-Se
meat quality
pigs
