微生态制剂对樱桃谷肉鸭生产性能的影响

通过在樱桃谷肉鸭日粮中添加不同种类的微生态制剂,研究微生态制剂对樱桃谷肉鸭生产性能的影响。将400羽10日龄樱桃谷肉鸭随机分为A、B、C、D、E共5个组,每组4个重复,每个重复20羽。其中E组为基础日粮对照组,D组为抗生素对照组,A、B和C组为试验组,分别在基础日粮中添加50 mg/kg芽孢杆菌混合物微生态制剂,1 000 mg/kg芽孢杆菌、寡糖混合物微生态制剂,以及1 000 mg/kg芽孢杆菌、粪链球菌混合物微生态制剂,试验期33 d。结果表明:C组的日均增重极显著高于2个对照组(P<0.01),存活率显著高于基础日粮对照E组;A、B、C三个试验组料重比与基础日粮对照E组相比,分别降低4.4%、10.6%和13.3%。结果提示,微生态制剂可提高樱桃谷肉鸭的生长性能,提高了樱桃谷肉鸭整齐度,提高饲料利用率,降低饲料成本。     

添加微生态制剂对樱桃谷肉鸭生产性能的影响

本试验旨在通过在樱桃谷肉鸭日粮中添加不同比例的微生态制剂,研究其对樱桃谷肉鸭的生长性能的影响。选取320羽10日龄樱桃谷肉鸭随机分为4个组,每组4个重复,每个重复20羽。其中1、2、3组为试验组,分别在基础日粮中添加10mg/1000kg、50mg/1000kg、100mg/1000kg肽乐健复合微生物添加剂,4组为基础日粮对照组,试验33d。结果表明:试验组的日增重、料重比、成活率明显高于基础日粮对照组,说明肽乐健复合微生物添加剂可提高樱桃谷肉鸭的生产性能,降低饲料成本,改善经济效益。     

复合微生态制剂对樱桃谷鸭生长性能、屠宰性能、肉品质和血清指标的影响

试验旨在研究复合微生态制剂对樱桃谷鸭屠宰性能、肉品质和血清指标的影响。选用480只健康的1日龄樱桃谷鸭，随机分成4组，对照组饲喂基础饲粮，试验组（F300、F500和F700）在基础饲粮中添加300、500、700mg/kg复合微生态制剂。每组6个重复，每个重复20只雏鸭，试验期42d。结果表明：与对照组相比，试验组樱桃谷鸭末重（FW）和平均日增重（ADG）均提高（P<0.01）,F/G降低（P<0.01）;F500组樱桃谷鸭胸肌水分含量高于F300组和F700组（P<0.05），胸肌红度（a*）值高于F700组（P<0.05）;F500组的总蛋白（TP）以及球蛋白（GLB）含量高于其他组（P<0.01）；试验组过氧化氢酶（CAT）和超氧化物歧化酶（SOD）活性高于对照组（P<0.01）,F500组和F700组总抗氧化力（T-AOC）和谷胱甘肽过氧化酶（GSH-Px）活性高于F300组和对照组（P<0.01），丙二醛（MDA）浓度低于对照和F300组（P<0.01）。由此可见，樱桃谷鸭饲粮中添加复合微生态制剂可以提高樱桃谷鸭生长性能，提高...     

微生态制剂和抗菌肽复合物对樱桃谷肉鸭生产性能和经济效益的影响

试验旨在研究饲粮中添加微生态制剂和抗菌肽复合物(商品名:康福特)对樱桃谷鸭生产性能和经济效益的影响。试验选取健康的1日龄樱桃谷鸭30,000羽,随机分在两个不同的鸭场,每个鸭场设置试验组和对照组,每组7,500羽。试验组在基础饲粮中添加500g/t微生态制剂和抗菌肽复合物,对照组饲喂基础饲粮。整个试验期为34d。结果显示,试验组的成活率、胴体重、料肉比均好于对照组,试验组比对照组平均每羽肉鸭多增加经济效益1.07~1.08元。     

不同微生态制剂对樱桃谷鸭生长性能的影响

选取900羽樱桃谷鸭,对照组饲喂基础日粮,试验组分别在基础日粮中添加酪宝宝、酪乳全、酪滋健、枯草芽孢杆菌h3-9和枯草芽孢杆菌BS-6,研究不同微生态制剂对樱桃谷鸭生长性能的影响。结果表明:21日龄时,试验1~4组的体重显著高于对照组(P<0.05),试验组的日增重显著高于对照组(P<0.05),料重比极显著低于对照组(P<0.01);试验组的出栏体重、平均日增重均高于对照组,但差异不显著(P>0.05),平均料重比低于对照组,试验4组与5组的效果更明显,但均差异不显著(P>0.05)。由此可见,在樱桃谷鸭饲粮中添加不同微生态制剂均能有效增加出栏体重和平均日增重,降低料重比,具有一定的经济效益,其中枯草芽孢杆菌的效果更佳。     

仙人掌提取物对樱桃谷鸭生产性能及其抗病力的影响

仙人掌提取物是一种新型的草药提取物,为研究其对樱桃谷鸭生产性能及其抗病能力的影响,本试验选用1 800只0日龄樱桃谷鸭,随机分成5组,每组360只。试验I组为空白对照组,试验Ⅱ组为抗生素对照组,试验Ⅲ、Ⅳ、Ⅴ组分别添加仙人掌提取物400、500、600 mg/kg。试验结果表明,仙人掌提取物按500mg/kg剂量添加能够显著提高樱桃谷鸭生产性能和抗病能力。因此,在肉鸭饲料中添加500~600 mg/kg仙人掌提取物具有较好的促进肉鸭生长、降低死亡率的作用。     

微生态制剂对樱桃谷肉鸭生长性能、屠宰性能及免疫器官发育的影响

本试验旨在研究饲粮中添加不同微生态制剂对樱桃谷肉鸭生长性能、屠宰性能及免疫器官发育的影响.选取320羽10日龄樱桃谷肉鸭,随机分为4组,1个对照组和3个试验组,每组4个重复,每个重复20羽.对照组饲喂基础饲粮,3个试验组分别饲喂在基础饲粮的基础上添加50 mg/kg芽孢杆菌混合物(试验Ⅰ组)、1000mg/kg芽孢杆菌与寡糖混合物(试验Ⅱ组)、1 000 mg/kg芽孢杆菌与链球菌混合物(试验Ⅲ组)的试验饲粮.试验期33 d.结果表明:试验Ⅱ组和试验Ⅲ组的平均日增重显著或极显著高于对照组(P＜0.05或P＜0.01).试验Ⅲ组的平均日采食量、料重比显著低于试验Ⅰ组和对照组(P＜0.05).各试验组的存活率显著或极显著高于对照组(P ＜0.05或P＜0.01).与对照组相比,试验Ⅲ组的腹脂率显著下降(P＜0.05),法氏囊指数显著升高(P＜0.05).由此得出,饲粮中添加芽孢杆菌与寡糖混合物和芽孢杆菌与链球菌混合物均能提高樱桃谷肉鸭的生长性能;此外,饲粮中添加芽孢杆菌与链球菌混合物还可提高樱桃谷肉鸭的胴体品质和免疫机能.     

复方维生素纳米乳促进樱桃谷肉鸭生长性能的效果研究

为了研究复方维生素纳米乳制剂对樱桃谷肉鸭生长性能的影响,并探索其在樱桃谷肉鸭日粮中适宜的添加比例,试验选择23日龄健康樱桃谷肉鸭,测定了不同浓度(0.4,0.2,0.13 m L/kg)复方维生素纳米乳对其平均日采食量、平均日增重和料重比等的影响。结果表明:日粮中添加复方维生素纳米乳后肉鸭生长性能均有显著提高(P0.05);添加0.4 m L/kg复方维生素纳米乳对肉鸭生长性能的提高效果最好。     

微生态制剂对肉羊生长性能和免疫功能的影响

为全面探讨微生态制剂对肉羊生长性能、营养物质消化率、免疫功能、屠宰性能和肉品质的影响,为微生态制剂在肉羊生产中的合理应用提供参考依据。研究将90只肉羊随机分成3组(对照组、试验Ⅰ组、试验Ⅱ组),对照组饲喂基础日粮,试验Ⅰ组、Ⅱ组分别在基础日粮中添加500mg/kg和1 000mg/kg微生态制剂。试验结果显示,试验Ⅰ组与对照组相比,在平均日采食量、平均日增重、料重比、干物质消化率、粗脂肪消化率、粗纤维消化率、脾脏指数、IgG含量、IL-6含量、屠宰率、pH、剪切力、滴水损失、熟肉率方面差异均显著(P0.05);试验Ⅱ组与对照组相比,在平均日采食量、平均日增重、料重比、干物质消化率、粗蛋白消化率、粗脂肪消化率、粗纤维消化率、脾脏指数、IgG含量、IgA含量、IL-2含量、IL-6含量、屠宰率、净肉率、GR值、大理石纹、pH、剪切力、滴水损失、熟肉率方面差异均显著(P0.05);试验Ⅰ组与Ⅱ组之间,在平均日采食量、粗蛋白、粗纤维、滴水损失方面差异显著(P0.05),其它检测指标差异均不显著(P0.05)。表明肉羊基础饲粮中添加500mg/kg和1 000mg/kg微生态制剂均能显著提高肉羊的生长性能、营养物质消化率、免疫功能、屠宰性能和肉品质,增加养殖经济效益,生产中建议选择500mg/kg作为最适添加剂量。     

微生态剂制剂对樱桃谷肉鸭生长性能及血清生化指标的影响

本研究旨在探讨微生态制剂对樱桃谷肉鸭生长性能及血清生化指标的影响。选取540羽1日龄樱桃谷肉鸭（公）,随机分成3组,每组6个重复,每重复30羽。Ⅰ组为空白对照组,饲喂基础饲粮,Ⅱ组为抗生素对照组,在基础饲粮中添加10%杆菌肽锌400 mg/kg,Ⅲ组为试验组,在基础饲粮中添加300 mg/kg微生态制剂（含枯草芽孢杆菌、屎肠球菌等,有效活菌数200亿个/g）,试验期42 d。结果表明：1）42日龄肉鸭平均体重Ⅲ组比Ⅰ组提高2.37%（P<0.05）;22~42日龄料重比Ⅲ组比Ⅰ组降低3.23%（P<0.05）,1~42日龄料重比Ⅲ组比Ⅰ组降低2.62%（P<0.05）。2）血清总蛋白含量Ⅲ组比Ⅰ组提高23.89%（P<0.01）;血清白蛋白含量Ⅲ组比Ⅰ组提高12.05%（P<0.01）;血清碱性磷酸酶含量Ⅲ组比Ⅰ组提高19.12%（P<0.05）。     

牛至草粉对肉鸭生长性能、抗氧化、肉品质及经济效益的影响

文章旨在评估日粮添加牛至草粉对1～42?d肉鸭生长性能、抗氧化和肉品质的影响。试验选择1日龄、平均体重为（48.63±0.06）g的商品肉鸭560只,随机分为4组,每组5个重复,每个重复26只。对照组肉鸭饲喂基础日粮,处理1组肉鸭饲喂基础日粮+50?mg/kg抗菌肽,处理2组和处理3组分别饲喂基础日粮+20和40?mg/kg牛至草粉。结果：与对照组相比,20?mg/kg牛至草粉组42?d肉鸭的体重显著提高7.23%（P＜0.05）,同时该组1～42?d肉鸭的饲料报酬显著提高14.81%（P＜0.05）。与对照组相比,20和40?mg/kg牛至草粉组肉鸭肌肉谷胱甘肽过氧化物酶活性分别显著提高23.08%和23.93%（P＜0.05）。抗菌肽组和20?mg/kg牛至草粉组肌肉丙二醛含量较对照组分别显著降低47.49%和52.36%（P＜0.05）。对照组血清丙二醛含量最高,20?mg/kg牛至草粉组丙二醛含量最低,对照组血清丙二醛含量较处理组分别显著提高87.53%、156.96%和78.07%（P＜0.05）。与对照组相比,处理组肌肉蒸煮损失分别显著降低35.86%、41.73%和39.95%（P＜0.05）,20和40?mg/kg牛至草粉组肌肉硫代巴比妥酸值分别显著降低11.76%和14.71%（P＜0.05）。结论：在本试验条件下,日粮添加牛至草粉对肉鸭的影响可以达到与抗菌肽一致的效果,其中粮添加20?mg/kg牛至草粉可以显著改善1～42?d肉鸭的饲料报酬,提高肌肉和血清的抗氧化性能,降低肌肉蒸煮损失。 [关键词]牛至草|肉鸭|生长性能|抗氧化|肉品质     

Effects of dietary oleuropein supplementation on growth performance,serum lipid concentrations and lipid oxidation of Japanese quails

An in vivo experiment was conducted to compare the effects of dietary supplementation with oleuropein and/or α‐tocopheryl acetate on growth performance, serum lipid concentrations and lipid oxidation of Japanese quail meat during refrigerated storage. Performance and slaughtering parameters were not affected by dietary treatments. The diets supplemented with oleuropein at the levels of 150 or 200 mg/kg were more effective in delaying lipid oxidation in breast and thigh meats compared with the control diet. The dietary inclusion of neither vitamin E nor oleuropein at different levels did not significantly affect the fatty acid compositions of the breast meat compared with the control diet. The diets supplemented with oleuropein at the levels of 150 or 200 mg/kg had significantly the highest polyunsaturated fatty acid and omega‐3 fatty acid contents in thigh meat compared with the vitamin E diet. The ratio of omega‐6 fatty acids to omega‐3 FAs in thigh meat of quails fed diet supplemented with vitamin E at the level of 200 mg/kg was equivalent to those of quails fed the diets supplemented with oleuropein at the levels of 100 and 150 mg/kg . The results showed that the dietary oleuropein supplementation at 150 mg/kg level may be used in quail diets enriched with the polyunsaturated fatty acids of vitamin E as a natural antioxidant.     

饲粮核黄素水平对15～42日龄北京鸭生长性能和血浆生化指标的影响

本试验旨在研究饲粮核黄素水平对15~42日龄北京鸭生长性能和血浆生化指标的影响。采用单因子完全随机试验设计,选取288只体重相近的15日龄雄性北京鸭,随机分为6个组,每组6个重复,每个重复8只鸭。对照组饲喂基础饲粮(核黄素水平为1.38 mg/kg),试验组分别饲喂在基础饲粮中添加1.00、2.00、3.00、4.00和5.00 mg/kg核黄素的试验饲粮。试验期为28 d。结果表明,与对照组相比,饲粮中添加核黄素显著提高了15~42日龄北京鸭的平均日增重和平均日采食量(P0.05),显著提高了血浆核黄素含量(P0.05),显著降低了血浆谷丙转氨酶活性和甘油三酯含量(P0.05)。由此可见,饲粮中添加核黄素可显著提高15~42日龄雄性北京鸭的生长性能和血浆核黄素含量。以平均日增重、平均日采食量、料重比和血浆核黄素含量为评价指标,采用折线模型估测15~42日龄雄性北京鸭核黄素需要量为2.24~2.66 mg/kg。     

Dietary Echinacea purpurea administration enhanced egg laying performance,serum lipid profile,antioxidant status and semen quality in duck breeders during summer season

This work investigated the outcomes of dietary administration of Echinacea purpurea (EP) powder to breeder ducks on productive and reproductive performance during summer season. Sudani ducks (320 birds) of 32-weeks-old (240 females and 80 males) were randomly allocated into four collections (body weight; 1850 ± 15.2 g for females and 2960.0 ± 40.5 g for males). The primary collection consumed the basal diet without supplementation and was deliberated as control. The other three collections were fed the basal diet supplemented with 2.5, 5.00 and 7.5 g EP/kg diet, correspondingly. Egg number and mass, laying rate, feed consumption and feed conversion ratio (FCR) were significantly changed by dietary EP levels. Drakes fed EP-supplemented diets had higher ejaculate volume, sperms concentration and live sperms (%) as well as lower dead sperms (%) than the control group. Eggs laid by ducks fed diet supplemented with 2.5 g/kg had the greatest fertility and hatchability percentages, followed by those fed 5.0 g EP/kg. Ducks fed different EP diets had higher values of haemoglobin, RBCs, WBCs and lymphocytes, lower values of heterophils percentage and lower H/L ratio than the control. All serum constituents were significantly changed by dietary EP supplementation, except of total protein and Alanine Aminotransferase (ALT) enzyme. Conclusively, dietary EP supplementation at 2.5 g/kg had beneficial effects on productive and reproductive performance as well as lipid profile and antioxidant status and economically valued in breeder ducks under summer conditions.     

Effects of a new recombinant phytase on performance and mineral utilization of laying ducks fed phosphorus-deficient diets

An experiment was conducted to evaluate the effects of a new phytase supplementation in Jinding laying ducks fed different concentrations of non-phytate P (NPP) on production performance, mineral retention, and bone and plasma minerals. A 14-wk experiment was conducted using 200-d-old female laying ducks. A total of 1,000 laying ducks were randomly allocated to 5 treatments and fed 5 diets: a control diet that contained an adequate concentration of NPP (0.45%) and 4 diets that were deficient in NPP (0.38, 0.32, 0.25, and 0.18%, respectively) but supplemented with phytase at 500 U/kg. Decreasing the NPP content from 0.45 to 0.18% in the diets with phytase supplementation had no detrimental effects on performance. However, Cu and Zn retention was significantly lower (P < 0.05) for laying ducks consuming the 0.18% NPP diet with phytase supplementation. Likewise, laying ducks fed the 0.18% NPP diet had a significant reduction in bone ash, Ca, P, and Cu contents, and in serum P and Cu (P < 0.05). Furthermore, the decrease in NPP content in the diet with phytase supplementation significantly increased (P < 0.05) P retention. Therefore, with the supplementation of this novel phytase at 500 U, it is possible to reduce dietary concentrations of NPP to 0.25% and maintain the normal performance of laying ducks.     

茶多酚对高酒糟日粮肉鸡生产性能和抗氧化特性的影响

本研究旨在评估添加茶多酚对高酒糟(distillers dried grain with solubles DDGS)日粮肉鸡生产性能和抗氧化特性的影响。将400只21日龄肉鸡随机分为5个处理,每个处理4个重复,每个重复20只。正对照组为玉米-豆粕型日粮,负对照组为玉米-豆粕-DDGS型日粮(15%DDGS),处理组分别在负对照日粮中添加100、300、500 mg/kg茶多酚。结果表明,与正对照组相比,后期日粮中添加15%DDGS对肉鸡生产性能无显著影响(P>0.05),但血液的GSH-Px降低8.31%(P<0.01),胸腿肉T-AOC含量降低,腿肉MDA值显著升高(P<0.05)。添加茶多酚提高了血液的T-AOC和GSH-Px活性(P<0.05)。随着茶多酚添加剂量的升高,T-AOC和GSH-Px有升高的趋势,但各水平组之间差异不显著;茶多酚添加300 mg/kg以上能显著降低胸腿肌MDA值(P<0.05),提高T-AOC含量,改善肉质的抗氧化特性。本研究结果表明,在肉鸡高DDGS日粮中添加茶多酚可以改善肉鸡机体及肉质的抗氧化特性。     

Effects of dietary supplementation of selenium and iodine on growth performance,carcass characteristics and histology of thyroid gland in goats

This study assessed the effects of dietary selenium (Se), iodine (I) and a combination of both on growth performance, thyroid gland activity, carcass characteristics and the concentration of iodine and selenium in Longissimus lumborum (LL) muscle in goats. Twenty‐four bucks were randomly assigned to four dietary treatments: control (CON), basal diet without supplementation, basal diet + 0.6 mg Se/kg dry matter (DM) (SS), 0.6 mg I/kg DM (IP), or combination of 0.6 mg/kg DM Se and 0.6 mg/kg DM I (SSIP) and fed for 100 days. Animals fed diet SSIP exhibited higher (P < 0.05) body weight and better feed conversion ratio (FCR) than those fed other diets. Dressing percentage of goats fed the supplemented diets was higher (P < 0.05) than that of the control. Carcasses from the IP group had higher (P < 0.05) total fat proportion than the SSIP group. The levels of both elements were significantly elevated (P < 0.05) in LL muscle in supplemented goats. Thyroid follicular epithelial cells of IP and SSIP animals were significantly higher than those of CON and SS groups. The study demonstrated that the combined Se and I dietary supplementation improves growth performance, carcass dressing percentage and increases the retention of Se and I in goat meat.     

饲粮中硒添加水平对产蛋高峰期临武鸭产蛋性能、蛋品质、血清抗氧化指标和蛋硒含量动态变化的影响

本试验旨在研究饲粮中硒添加水平对产蛋高峰期临武鸭产蛋性能、蛋品质、血清抗氧化指标和蛋硒含量动态变化的影响。试验选用29周龄体况良好、产蛋率接近的正处于产蛋高峰期的临武鸭200只,随机分为5组,每组5个重复,每个重复8只。对照组饲喂基础饲粮(不额外补充硒源,实测硒含量为0.15 mg/kg)45 d,Ⅰ组、Ⅱ组、Ⅲ组、Ⅳ组分别在基础饲粮中以酵母硒形式添加0.10、0.20、0.40、0.80 mg/kg的硒,饲喂35 d添加硒饲粮后改喂基础饲粮10 d。结果显示:1)饲粮中硒添加水平对蛋鸭产蛋性能和蛋品质各指标均无显著影响(P0.05)。2)与对照组和Ⅰ组相比,饲粮中添加0.40和0.80 mg/kg的硒可以显著提高蛋鸭血清中硒和谷胱甘肽(GSH)含量以及超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)活性(P0.05),显著降低血清中丙二醛(MDA)含量(P0.05)。3)随试验天数的增加,对照组和Ⅰ组蛋硒含量无显著变化(P0.05),而Ⅱ组、Ⅲ组、Ⅳ组蛋硒含量均呈现先升高后降低的趋势,且均在试验第9天达到峰值。试验第7、9、13、17、21、28和35天,Ⅱ组、Ⅲ组、Ⅳ组蛋硒含量显著高于对照组和Ⅰ组(P0.05);停喂添加硒饲粮的第1~4天,Ⅱ组、Ⅲ组、Ⅳ组蛋硒含量仍显著高于对照组(P0.05);停喂添加硒饲粮的第5~8天,Ⅲ组和Ⅳ组蛋硒含量显著高于对照组(P0.05);停喂添加硒饲粮的第9天,各试验组蛋硒含量均衰减至与对照组相同水平(P0.05)。由此可见,饲粮中添加不同水平的酵母硒形式的硒对产蛋高峰期临武鸭的产蛋性能和蛋品质均无不良影响。饲粮中添加0.40和0.80 mg/kg酵母硒形式的硒可以提高产蛋高峰期临武鸭的蛋硒含量、血清硒含量和抗氧化能力,延长蛋硒的存留时效。综合考虑各因素,产蛋高峰期临武鸭饲粮中硒(以酵母硒形式添加)的适宜添加水平为0.40 mg/kg。     

天蚕素抗菌肽对肉兔生产性能和免疫器官指数的影响

试验旨在研究天蚕素抗菌肽对新西兰兔生产性能和免疫器官指数的影响。选择160只35日龄断奶的新西兰肉兔,随机分为5个处理,每个处理4个重复,每个重复8只兔。对照组饲喂基础饲粮,试验组分别在基础饲粮基础上添加30 mg/kg喹乙醇、150、200 mg/kg和250 mg/kg天蚕素抗菌肽,试验期为8周。结果表明,天蚕素抗菌肽可一定程度提高肉兔的日增重,显著降低料重比(P<0.05),对肉兔的采食量无显著影响(P>0.05);添加天蚕素抗菌肽有增加肉兔脾脏和胸腺重量的趋势,添加200 mg/kg和250 mg/kg天蚕素抗菌肽可显著提高肉兔脾脏指数和胸腺指数(P<0.05)。由此可见,在肉兔饲粮中添加天蚕素抗菌肽,可提高肉兔生产性能,促进免疫器官发育,提高免疫器官指数。