Effect of dietary supplementation with flavonoid from Scutellaria baicalensis Georgi on growth performance,meat quality and antioxidative ability of broilers

An experiment was conducted to investigate the effect of dietary supplementation with flavonoid from Scutellaria baicalensis Georgi(SBGFN) as SBGFN-zinc(SBGFN-Zn) on growth performance, meat quality, immune responses and antioxidation of broilers. A total of 450 one-d-old Arbor Acres male broilers were randomly allocated to 5 treatments with 6 replicates of 15 birds per replicate for each treatment in a completely randomized design. Birds were fed a SBGFN-unsupplemented cornsoybean meal basal diet(control) or the basal diet supplemented with 60, 120, 180 or 240 mg SBGFN kg~(–1) from SBGFN-Zn for 42 d. Dietary SBGFN supplementation affected(P0.03) drip loss in thigh muscle, total superoxide dismutase(T-SOD) and glutathione peroxidase(GSH-Px) activity in liver of broilers at 42 d of age. Chicks fed the diets supplemented with 120, 180 and 240 mg SBGFN kg~(–1) had lower(P0.03) drip loss of thigh muscle than those fed the control diet. Chicks fed the diet supplemented with 180 mg SBGFN kg~(–1) had higher(P0.03) liver T-SOD and GSH-Px activity than those fed the diets supplemented with 0, 60 and 120 mg SBGFN kg~(–1). The results from the present study indicate that dietary supplementation with 180 mg SBGFN kg~(–1) as SBGFN-Zn improved both meat quality and antioxidative ability of broilers.     

Effect of dietary supplementation of pyrroloquinoline quinone disodium on growth performance,meat quality and antioxidative ability of broilers

This study was conducted to investigate the effect of dietary supplementation with pyrroloquinoline quinone(PQQ) in the form of PQQ disodium(PQQ·Na2) on the growth performance, carcass traits, meat quality and antioxidative ability of broilers. A total of 720 one-d-old Arbor Acres male broilers were randomly allocated to 1 of 6 treatments with 8 replicates of 15 birds per replicate in a completely randomized design. Birds were fed a PQQ·Na2-unsupplemented corn-soybean meal basal diet(control) or the basal diet supplemented with 0.1, 0.2, 0.3, 0.4 or 0.5 mg PQQ·Na2 kg–1 for 42 d. Compared with the control chicks, the chicks fed the diets supplemented with PQQ·Na2 had lower(P0.05) feed:gain(F/G) during the grower phase and drip losses of breast muscles on day 42. As supplemental PQQ·Na2 level increased, plasma total antioxidant capacity(T-AOC) on d 42, liver T-AOC on d 21 and heart T-AOC on d 21 and 42 increased linearly(P0.05), but malondialdehyde concentrations in plasma, liver and heart on d 21 or 42 decreased linearly(P0.001) or quadratically(P0.005). The results from the present study indicate that dietary supplemental PQQ·Na2 can improve antioxidant ability and meat quality of broilers, and in general, it is implied that the optimal supplemental PQQ·Na2 level is 0.1 mg kg–1 of diet for broilers from 1 to 42 d of age.     

日粮中添加红花油对生长育肥猪生产性能和胴体品质的影响

研究日粮中添加不同水平的红花油对生长育肥猪生长性能和胴体品质的影响．日粮中添加红花油水平分别为0,0．4％,0．6％,0．8％和1％．结果表明：添加红花油的各试验组的平均日增重、粗蛋白、粗脂肪、粗纤维等消化率显著提高（P〈0．05）,饲料利用率得到改善;各试验组猪的屠宰率和瘦肉率显著高于试验组1,眼肌面积、脂肪酸含量也比试验组1得到提高,降低了胆固醇含量,改善了猪肉品质．     

富集环境对育肥猪生产性能及胴体肉品质影响

为了解富集环境对育肥猪生产性能、胴体品质和肉质影响,将杜长大(杜洛克×长白×大白n=60)、大杜民(大白×杜洛克×民猪n=60)和杜长民(杜洛克×长白×民猪n=60)育肥猪分别饲养在富集和贫瘠环境圈舍,测定其生产性能,胴体品质及肉质。结果表明,畜舍环境对育肥猪生产性能和胴体品质无显著影响(P0.05),但富集环境中育肥猪屠宰后24 h肌肉p H(p H24)显著高于贫瘠环境(P0.05);与大杜民和杜长民相比,杜长大生长至100 kg时间短(P0.001),日增重和胴体眼肌面积较大(P0.05),胴体平均背膘厚较小(P0.05);大杜民和杜长民p H24显著高于杜长大(P0.05)、肉色亮度(L*)显著低于杜长大(P0.05)。富集环境对育肥猪生产性能和胴体品质无显著影响,但有助于改善肉质。民猪杂交育肥猪生产性能稍差,胴体脂肪比例偏高,肉多汁性较好。     

日粮添加赖氨酸和盐酸吡格列酮对育肥猪生产性能、血清生化指标及肉品质的影响

【目的】研究日粮添加赖氨酸(Lysine,Lys)和盐酸吡格列酮(Thiazolidinedione,TZD)对肥育猪生产性能、血清生化指标及肉品质的影响。【方法】选用160头体质量均一[体质量=(92.25±0.91)kg]、健康的杜×长×大三元杂肥育猪,随机分成4个处理,每个处理5个重复,每个重复8头猪(公母各半)。对照组饲喂基础日粮[w(Lys)为0.85%],试验组Ⅰ为基础日粮+15 mg·kg~(–1) TZD,试验组Ⅱ为基础日粮+w为0.20%Lys+15 mg·kg~(–1) TZD,试验组Ⅲ为基础日粮+w为0.40%Lys+15 mg·kg~(–1) TZD。试验结束后从对照组和试验组Ⅲ每重复选取1头公猪进行屠宰,评定其屠宰性能及肉品质。【结果】与对照组相比,在第28天,试验组Ⅲ日增质量提高9.45%(P=0.055);在第14天,试验组Ⅲ血清高密度脂蛋白含量显著高于对照组,提高了22.81%(P0.05);在第28天,试验组Ⅲ瘦肉率及背最长肌肉色红度(a*值)均显著高于对照组,分别提高了7.04%和4.11%(P0.05)。【结论】日粮添加Lys质量分数为0.40%(总Lys质量分数为1.25%)和15 mg·kg~(–1)的TZD可增加肥育猪的日增质量和瘦肉率,并改善肌肉的红度。     

Effects of conditioners (single-layer,double-layer and retention-conditioner) on the growth performance,meat quality and intestinal morphology of growing and finishing pigs

This experiment was conducted to investigate the effects of feed conditioners(single-layer, double-layer and retentionconditioner) on the growth performance, meat quality and intestinal morphology of pigs throughout the growing to finishing phase. A total of 96 growing pigs((28.70±3.20) kg) were selected and randomized into three treatment groups with four replicates per group. Eight pigs were used per replicate for the 17-week feeding trial. The grower diet was given at 0 to 6 weeks and a finisher diet was given at 6 to 17 weeks. The treatments were as follows: SC diet(control; single-layer conditioning), DC diet(double-layer conditioning), and RC diet(retention-conditioning). Starch gelatinization was significantly higher(P0.05) in the RC treatment than in the SC treatment, however, there was no significant difference in the starch gelatinization between the DC group and the RC group. In the growing phase, the feed to gain index(F:G) was significantly lower(P0.05) in the RC group than in the SC and DC groups. Between growing and finishing, the F:G was the lowest(P0.05) in the SC group compared to the RC or DC group. Drip loss, a measurement of meat quality, was significantly lower(P0.05) in longissimus dorsi tissue collected from pigs fed the RC diet than in tissues collected from pigs fed the SC diet. The intestinal quality of the duodenum and jejunum tissues showed a significant increase(P0.05) in the crypt depth and villus height in the RC group compared to the SC-or DC-treated pigs. These results demonstrated that the retentionconditioner treatment decreased the F:G in growing pigs, improved intestinal morphology and enhanced the meat quality in the finishing pigs. However, the retention-conditioner treatment had a negative impact on growth performance in the finishing pigs.     

日粮蛋白水平对圩猪生长性能、肉质和血清生化指标的影响

【目的】探讨不同蛋白水平日粮对圩猪生长性能、肉质和血清生化指标的影响,确定圩猪适宜的蛋白质营养水平。【方法】选用平均体质量约为35kg的健康圩猪24头,按照公母比例1∶1的原则随机分为3个处理组,每组8个重复,采用种猪自动饲喂系统饲喂,耗料和体质量实时自动记录。试验期共分为2个阶段(生长期:35~60kg;肥育期:60~80kg)饲养,1,2,3组生长期粗蛋白水平分别为180,160和140g/kg,肥育期粗蛋白水平分别为160,140和120g/kg。3个处理组除粗蛋白水平不同外,其他营养水平基本一致。试验结束时,对全部试猪前腔静脉采血以进行血液生化指标与部分内分泌激素浓度的测定,同时每组选取4头体质量相近的公猪屠宰,测定其屠宰性能和肉质。【结果】在育肥阶段,日粮中粗蛋白含量最少的试验3组料体质量比极显著高于1组和2组(P<0.01)。除屠宰后24h肉样的pH值和亮度(L)值外,各组间肉质性状差异均不显著(P>0.05),1组屠宰后24h的pH值显著低于2组(P<0.05),而L值显著高于2组(P<0.05);1组的肌苷酸含量显著高于2组(P<0.05),不饱和脂肪酸和单不饱和脂肪酸含量极显著高于3组(P<0.01),但均与2组差异不显著(P>0.05)。随着日粮蛋白水平的降低,血清尿素氮浓度下降,3组血清尿素氮浓度显著低于试验1组和2组(P<0.05),血清甲状腺素T3浓度显著高于2组(P<0.05)。【结论】在日粮消化能水平为12.77MJ/kg时,圩猪生长期和肥育期日粮粗蛋白水平均以140g/kg为宜。     

不同饲料添加剂对商品猪生长性能及胴体肉品质影响

试验研究了甜菜碱、VE和B族维生素对杂交商品猪的生长肥育性能及胴体内品质的影响。结果表明：日粮中添加100g／100kg甜菜碱、45g／100kg B族维生素（简称VB）和20g／100kg VE的试验组日增重都明显提高,分别比对照组提高72g（P〈0．05）、43．7g（P〈0．05）和29．8g（P〈0.05）,料重比三个试验组比对照组有降低的趋势（P〉0.05）。甜菜碱、VE和VB对试验猪的胴体内品质都有改善作用。与对照组相比,甜菜碱组和VB组的眼肌面积分别提高22．54％和17．29％;背膘厚VE组和甜菜碱组分别降低23．13％和14．18％;瘦肉率VE组、甜菜碱组和VB组分别提高10．36％（P〈0．05）、7．42％（P〉0．05）和4．62％（P〉0．05）。肉色和大理石纹评分甜菜碱组和VE组分别提高18．87％、20％和18．87％、30％,失水率VE组降低48．47％。肌内脂肪VE组、VB组和甜菜碱组分别提高25％、23．93％和10．71％。利用综合选择指数就甜菜碱、VE和VB对试验猪的影响进行综合评定,结果显示：VE对试验猪的肥育性能和内质改良效果最好。     

纳米硒对肥育猪肌肉品质的影响

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45 kg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0～0.20 mg/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;1.00 mg/kg硒添加水平滴水损失显著高于0.20～0.50 mg/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0.40～1.00 mg/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0.10～0.30 mg/kg时,两种硒源对背最长肌GSH-Px活性、-AOC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GSH-Px活性和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硒源添加浓度在0.10～0.30 mg/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＜0.05),硒源和硒添加水平对背最长肌肌红蛋白没有显著影响(P＞0.05).上述结果提示,纳米硒的Weinberg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.     

日粮粗纤维水平对圩猪生长性能、肉品质及血液生化指标的影响

【目的】研究不同粗纤维水平日粮对圩猪生长性能、肉品质以及血液生化指标的影响,以确定圩猪日粮的适宜粗纤维水平。【方法】选取24头体质量为(36.48±3.80)kg/头健康圩猪,随机分为3个处理组,每组8个重复,每重复公6母2。试验分为2个阶段:生长期(35~60kg)和肥育期(60~80kg)。生长期粗蛋白质为160.0g/kg,消化能为12.77 MJ/kg,试验1、2和3组粗纤维水平分别为58.0,64.3和70.9g/kg;育肥期粗蛋白质为140.0g/kg,消化能为12.81 MJ/kg,试验1、2和3组粗纤维水平分别为53.7,60.5和67.2g/kg。试猪采用种猪自动饲喂系统饲喂,耗料和体质量实时自动记录。试验结束时,每组选取6头体质量相近的猪屠宰(4公2母),测定其生长性能、屠宰性能和肉品质,同时全部试验猪实行前腔静脉采血以进行血液生化指标的测定。【结果】生长期试验2组体质量增加成本显著比试验1组高11%(P0.05);育肥期内,试验3组平均日增质量和平均日采食量分别显著高于试验2组和试验1组(P0.05),其料肉比(3.64)和体质量增加成本分别比试验2组低21.04%和18.83%(P0.05)。试验3组屠宰率极显著低于其他组(P0.01),A1值和L24值显著高于试验1组(P0.05)。随着日粮粗纤维水平的增加,屠宰后圩猪肉的pH1和pH24值均表现为先降低后升高。试验3组十八碳-顺-9-烯酸和单不饱和脂肪酸含量极显著高于试验2组(P0.01),但9,12-十八碳二烯酸、7,10,13-二十碳三烯酸、全顺-5,8,11,14-二十碳四烯酸和多不饱和脂肪酸含量均显著低于试验2组(P0.05),除半胱氨酸、组氨酸和脯氨酸外,试验2组其余氨基酸的含量均显著高于试验1组(P0.05),但其血清谷草转氨酶活性和葡萄粮浓度显著低于试验1组(P0.05)。【结论】综合考虑生长性能、经济效价、肉品质和血清生化指标认为,对于生长期圩猪,当日粮粗蛋白质水平为160.0g/kg、消化能水平为12.77 MJ/kg时,适宜的粗纤维水平以58.0g/kg为宜;对于育肥期圩猪,当日粮粗蛋白质水平为140.0g/kg、消化能水平为12.81 MJ/kg时,粗纤维水平以67.2g/kg为宜。     

半胱胺对肥育猪生产性能和胴体品质的影响

试验设4个处理组,对照组日粮为基础日粮,试验Ⅰ组、Ⅱ组、Ⅲ组日粮分别在基础日粮基础上添加半胱胺100、200、300 mg/kg,研究不同剂量半胱胺对肥育猪生产性能和胴体品质的影响。结果表明,与对照组比较,试验Ⅰ组、Ⅱ组和Ⅲ组的平均日增重分别显著提高4.20%、5.97%、4.32%,料重比分别降低4.65%、7.84%、5.52%,臀腿比例分别显著提高8.25%、10.37%、8.96%,眼肌面积分别显著增加11.14%、13.91%、13.00%,平均背膘厚度分别显著降低13.63%、16.78%、16.43%,瘦肉率分别显著提高5.31%、7.86%、5.34%;在肥育猪日粮中添加适宜剂量的半胱胺能明显提高肥育猪的生产性能,而过量添加的效果并不明显。     

桑叶黄酮抗氧化及抑制蛋白糖基化作用

为观察桑叶总黄酮的降糖作用及其对抗氧化酶、蛋白糖基化的影响.用桑叶总黄酮(8 g生药/kg体重)灌胃四氧嘧啶诱导的糖尿病大鼠4周,观察给药前后血糖变化,测定LPO、SOD、GSH-px及果糖胺水平;分别以0.001,0.01,0.1 g/L桑叶总黄酮浓度加入体外蛋白糖基化体系孵育1,4,7,14,21,28d,测定早期糖化蛋白产物的浓度.结果表明:与对照组比较,桑叶总黄酮组有明显降血糖作用.桑叶总黄酮组血糖由(18.33±3.33)mmol/L降至(10.19±4.45)mmol/L,P＜0.05,LPO含量由(10.51±2.31)nmol/L,降至(6.01±2.04)nmol/L,P＜0.05,SOD水平由(471.1±103.0)Nu/mL,升至(678.7±31.5)Nu/mL,P＜0.001,果糖胺水平由(6.22±1.37)mmol/L,降至(1.70±0.32)mmol/L,P＜0.05,体外糖化蛋白产量孵育时间呈正相关,0.1 g/L桑叶总黄酮在各时间点均能使糖化蛋白生成量降低.因此:桑叶总黄酮能显著降低糖尿病大鼠血糖、LPO含量并提高SOD水平,抑制蛋白糖基化.     

"十全大补"药渣对肥育猪生长、胴体特性和肉质的影响

研究在基础日粮中添加不同剂量"十全大补"药渣对肥育猪生长性能、胴体特性和肉质的影响.与对照组比较,肥育猪日粮中添加0.5%、1.0%、1.5%的中草药渣日增重分别增加7.40%(P＜0.05)、12.88%(P＜0.05)和9.75%(P＜0.05),料重比分别降低5.20%(P＜0.05)、7.23%(P＜0.05)和6.07%(P＜0.05);瘦肉率分别提高3.86%(P＞0.05)、6.27%(P＜0.05)和5.80%(P＜0.05),脂肪率分别降低6.42%(P＜0.05)、9.63%(P＜0.05)和9.30%(P＜0.05),背膘厚分别降低7.20%(P＜0.05)、13.26%(P＜0.05)和12.12%(P＜0.05),眼肌面积分别提高4.46%(P＞0.05)、9.24%(P＜0.05)和6.30%(P＜0.05);肌肉红色色度分别提高2.75%(P＞0.05)、6.67%(P＜0.05)和3.92%(P＞0.05),滴水损失率分别降低9.32%(P＜0.05)、12.42%(P＜0.05)和8.07%(P＜0.05);粗脂肪含量分别提高20.80%(P＜0.05)、28.47%(P＜0.01)和25.55%(P＜0.01).结果表明"十全大补"药渣可作为肥育猪饲料添加剂,具有改善其生长、胴体特性和肉质的效果.     

性别对配套系商品猪生长性能及胴体肉品质影响

选择体重30 kg左右的杂交商品猪92头,公猪去势,母猪不去势,研究性别对猪只生长肥育性能、胴体性能和肉品质的影响。结果表明:公猪组与母猪组相比,30~100 kg期内增重和平均日增重分别提高5.86%(P<0.01)和6.87%(P<0.01);平均背膘厚和皮脂率分别提高27.76%(P<0.01)和20.46%(P<0.01);大理石纹评分和肌内脂肪分别提高11.56%(P<0.05)和7.25%(P>0.05)。母猪组与公猪组相比,眼肌面积增加20.51%(P<0.01);瘦肉率提高5.32个百分点(P<0.01);熟肉率提高1.10%(P>0.05)。性别对猪只的生长肥育性能和胴体性能有显著的影响,对肉质的影响不明显。     

钙源对肉仔鸡生长性能、屠宰性能及肉品质的影响

采用不同钙源及钙水平的日粮对肉仔鸡生长性能、屠宰性能及肉品质的影响,试验选用144只健康21日龄的AA肉仔鸡,随机分成4个处理,每个处理6个重复,每个重复6只.饲粮采用两种钙源(碳酸钙、氯化钙)、两个钙水平(0.90%、L15%),试验期28 d(4～7w).结果表明,与碳酸钙相比,日粮中氯化钙可降低肉仔鸡的生长性能(...     

饲料中添加桑叶粉对草鱼生长性能和肉质风味的影响

[目的]研究饲料中添加不同比例桑叶粉对草鱼生长性能和肉质风味的影响,为桑叶粉在水产养殖中的应用提供理论依据.[方法]在基础饲料中分别添加0(对照)、5％、10％、15％和20％的桑叶粉,配成5种等氮等脂(含蛋白质25.55％、脂肪3.25％)的试验饲料.选取1500尾草鱼中鱼(初始体质量1112.06±83.19 g)...     

Effects of selenium source and level on growth performance,antioxidative ability and meat quality of broilers

This experiment was conducted to investigate the effects of selenium(Se) source and level on growth performance, carcass traits, antioxidative ability and meat quality of broilers. A total of 320 one-d-old Arbor Acres commercial broilers were randomly assigned to 1 of 5 treatments with 8 replicates in a completely randomized design involving a 2×2 factorial arrangement of treatments plus one Se-unsupplemented basal diet control for 42 d. The two Se sources were sodium selenite and Se yeast, and the two supplemental Se levels were 0.20 and 0.40 mg Se kg–1. The results showed that broilers fed the Se-supplemented diets had higher(P0.05) average daily gain and average daily feed intake from 22 to 42 d of age, eviscerated yield and abdominal fat percentages, Se concentrations and glutathione peroxidase(GSH-Px) activities in breast and thigh muscles on d 42, and lower(P0.05) feed/gain from 1 to 21 and 22 to 42 d of age, mortality from 22 to 42 d of age and malondialdehyde(MDA) concentration in thigh muscle on d 42 than those fed the control diet. Broilers fed the diets supplemented with Se yeast had higher(P0.05) p H value and lower(P0.05) shear force in thigh muscle than those fed the diets supplemented with sodium selenite. Additionally, broilers fed the diets supplemented with 0.40 mg Se kg–1 had lower(P0.05) shear force in thigh muscle and higher(P0.05) GSH-Px activities in breast and thigh muscles than those fed the diets supplemented with 0.20 mg Se kg–1. Furthermore, broilers fed the diet supplemented with Se yeast at 0.40 mg Se kg–1 had higher(P0.05) Se concentrations in breast and thigh muscles than those fed the diet supplemented with Se yeast at 0.20 mg Se kg–1, but no differences(P0.05) were observed in these indices of broilers fed the diets supplemented with sodium selenite between 0.20 and 0.40 mg Se kg–1. The results from the present study indicated that supplemental Se could increase the growth performance, muscle Se concentration and antioxidative ability of broilers; and the Se from Se yeast was more effective than the Se from sodium selenite in improving meat quality of broilers.     

女贞子粉及其萃取物对肥育猪肉品质和抗氧化性能的影响

试验选择健康的56日龄体重20 kg左右的杜长大三元杂交仔猪48头,随机分为4个处理组,每个处理3个重复,每个重复4头猪,研究日粮中添加女贞子粉及其萃取物对肥育猪肉品质和抗氧化性能的影响.对照组饲喂基础日粮,试验组在基础日粮中分别添加1％的女贞子粉、0.1％的萃取物和0.01％的金霉素.试验从仔猪56日龄开始到150日...     

乳酸杆菌发酵饲料对猪生长性能和肉质及血清抗氧化性能的影响

选用体重为(20±0.5)kg的"杜×长×大"杂交仔猪,随机分为5组:对照组饲喂普通全价饲料;BS10组饲喂0.1%植物乳杆菌BS10发酵饲料;JJB3组饲喂0.1%乳酸杆菌JJB3发酵饲料;H组饲喂1.0%乳酸杆菌H发酵饲料;BB组饲喂0.1%乳酸杆菌BB发酵饲料。每组4个重复,每个重复3头猪。饲喂136 d后分析猪的生长性能、猪肉品质及血清抗氧化性能。结果表明:在生长期,各乳酸杆菌试验组猪的生长性能与对照组的差异均无统计学意义(P0.05);在肥育期,各乳酸杆菌试验组猪的生长性能均显著优于对照组(P0.05);JJB3组和BB组猪的肉色显著优于对照组(P0.05);各乳酸杆菌试验组猪的滴水损失均低于对照组(P0.05),BS10组和JJB3组猪的肌肉剪切力显著低于对照组(P0.05);各乳酸杆菌试验组猪血清中超氧化物歧化酶(SOD)活性均显著高于对照组(P0.05),过氧化氢酶(CAT)与谷胱甘肽过氧化物酶(GSH–Px)活性均高于对照组(P0.05),而丙二醛(MDA)含量显著或极显著低于对照组。以上结果表明,乳酸杆菌发酵饲料能够提高猪的生长性能,改善猪肉品质,增强血清抗氧化性能。     

大豆异黄酮和抗生素对文昌鸡生长性能、肉品质和血浆抗氧化指标的影响

【目的】对比大豆异黄酮和抗生素对文昌鸡生长性能、肉品质及血浆抗氧化指标的影响,为大豆异黄酮在文昌鸡生产中的实际应用提供参考。【方法】选用1日龄文昌鸡母雏540只。试验分3组,包括空白对照组、抗生素组和大豆异黄酮组,每组4个重复,每个重复45羽。分小鸡、中鸡和大鸡3个阶段进行试验。【结果】生长性能结果显示,1~30日龄小鸡各组之间的平均日增质量、平均日采食量和料重比均无显著差异(P0.05);31~80日龄阶段,大豆异黄酮组的平均日增质量显著高于对照组(P0.05);81~120日龄阶段,大豆异黄酮组的平均日采食量显著高于对照组(P0.05)。肉品质结果显示,各组的肉色L*、a*、b*和pH差异均不显著(P0.05);与对照组相比,大豆异黄酮组的熟肉率显著提高(P0.05)。血浆抗氧化指标结果显示,31~80日龄阶段,大豆异黄酮组的总抗氧化能力(Total antioxidant capacity,T-AOC)活性显著高于抗生素组(P0.05);81~120日龄阶段,大豆异黄酮组的肌酸激酶(Creatine kinase,CK)活性显著低于抗生素组,谷胱甘肽(Glutathione,GSH)含量显著高于抗生素组,抗生素组和大豆异黄酮组的T-AOC活性显著高于对照组(P0.05)。【结论】中鸡阶段饲粮中添加20 mg·kg~(–1)大豆异黄酮可以提高鸡日增质量和抗氧化水平;大鸡阶段饲粮中添加15 mg·kg~(–1)大豆异黄酮能够提高鸡采食量、熟肉率和抗氧化水平。