纳米硒对肉鸡肌肉品质的影响

Effect of Nano-Selenium on Meat Quality of Broiler Chicks

本实验以亚硒酸钠为对照,研究了纳米硒对肉鸡肌肉品质的影响。岭南黄公母混合雏780羽按饲养试验要求分为13组,每组4个重复,每个重复15羽。将纳米硒和亚硒酸钠2种硒源分别以0.1、0.2、0.3、0.4、0.5、1.0 mg/kg 6个硒水平添加到基础日粮中,基础日粮作对照。结果显示:(1)纳米硒添加浓度在0.20-1.0 mg/kg胸肌滴水损失始终保持在低峰平台。硒源添加浓度在0.40-1.0 mg/kg硒时,纳米硒组胸肌滴水损失显著低于亚硒酸钠组(P<0.05)。(2)硒源添加浓度在0.10-0.40 mg/kg时,两种硒源对胸肌GSH-Px活性的影响无显著差异(P<0.05);在0.50和1.0 mg/kg硒添加水平上,纳米硒组GSH-Px 活性显著高于亚硒酸钠组(P<0.05)。硒源添加浓度在0.40-1.0 mg/kg硒时,纳米硒组T-AOC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)不加硒的空白组胸肌硒含量显著低于加硒组。硒源添加浓度在0.10-0.30 mg/kg时,两种硒源对胸肌硒含量的影响无显著差异;在0.40- 1.0 mg/kg硒添加水平上,纳米硒组胸肌硒含量显著高于亚硒酸钠组。上述结果提示,纳米硒的Wein berg剂量-效应的最适剂量范围要宽于亚硒酸钠,高剂量添加时比亚硒酸钠更能提高肌肉组织抗氧化能力,降低肉的滴水损失;肌肉硒沉积率优于亚硒酸钠。

Seven hundred eighty Linen Yellow broiler chicks, 1 d of age, were used to investigate the effects of nano elemental selenium (Nano-Se) or sodium selenite (Na2SeO3) on meat quality. The chicks were allocated to 13 treatments, each of which had 4 pens of 15 chicks per pen. The thirteen dietary treatments were basal diet only (containing 0.04 mg/ kg Se), basal diet +0.1、0.2、0.3、0.4、0.5、1.0 mg/kg Se as Na2SeO3 or Nano-Se, respectively. The results were as follows: (1)When Nano-Se was added to the diet, drop loss remained steady at the peak value even at a concentration of 1.0 mg/ kg Se. The chicks had lower (P<0.05) drop loss at a concentration range of 0.40-1.0 mg/kg as Nano-Se than Na2SeO3. (2)There were no difference in the activities of GSH-Px between the treatments of Nano-Se and Na2SeO3 when the added concentration of Se was 0.10-0.40 mg/kg. The chicks had higher (P<0.05) activities of GSH-Px at a concentration range of 0.50 and 1.0 mg/kg as Nano-Se than Na2SeO3. The chicks had higher (P<0.05) T-AOC and lower (P<0.05) MDA at a concentration range of 0.40-1.0 mg/kg as Nano-Se than Na2SeO3. The results implicated that for the best concentration range of Weinberg curve, Nano-Se is wider than Na2SeO3 and supplentation with high level of Se as Nano-Se improved the antioxidant capacity, decreased drop loss and increased Se content of breast muscle as compared with NaSeO3.