共查询到19条相似文献，搜索用时 265 毫秒
1.
本试验旨在研究饲粮添加葡萄籽原花青素（GSPs）对四川白鹅生长性能和抗氧化能力的影响。试验选取14日龄健康且体重相近的四川白鹅160只，随机分为4组，每组5个重复，每个重复8只鹅。对照组饲喂基础饲粮；3个GSPs组试验第1阶段（21～42日龄）在基础饲粮中分别添加25、50和75 mg/kg GSPs，第2阶段（43～63日龄）在基础饲粮中分别添加50、100和150 mg/kg GSPs。预试期7 d，正试期43 d。结果表明：1）与对照组相比，饲粮添加不同水平GSPs对四川白鹅生长性能指标均无显著影响（P>0.05）。2)42日龄，与对照组相比，饲粮添加不同水平GSPs显著提高血清和肾脏总抗氧化能力（T-AOC）和谷胱甘肽过氧化物酶（GSH-Px）活性（P<0.05），显著降低血清和肝脏丙二醛（MDA）含量（P<0.05）；饲粮添加75 mg/kg GSPs显著提高肝脏T-AOC及GSH-Px和过氧化氢酶（CAT）活性（P<0.05），显著降低肾脏MDA含量（P<0.05）；饲粮添加50和75 mg/kg GSPs显著提高肝脏超氧化物歧化酶1(SOD1... 相似文献
2.
以纳米蒙脱石（MNC）为吸附材料,重金属铅为吸附对象,以＂杜长大＂三元杂交猪为试验动物,研究了MNC驱铅对生长肥育猪机体免疫与抗氧化性能的影响。免疫学指标测定结果表明,与10mg/kg铅组比较,10mg/kg铅＋0.5%MNC组猪的胸腺、脾脏系数分别减少了27.97%（P〈0.01）、12.37%（P〈0.05）,T-淋巴细胞转化力、血清IgG、IgM水平分别提高了17.89%（P〈0.05）、16.20%（P〈0.05）、14.46%（P〈0.05）。试验各组的IgA水平均未发生显著性变化（P〉0.05）。抗氧化能力研究表明,与对照组相比,加MNC组猪血清与肝脏中MDA含量显著降低（P〈0.05）,CTA、SOD、GSH-Px活力均显著提高（P〈0.05）;与10mg/kg铅组比较,添加10mg/kg铅＋0.5%MNC组猪血清和肝脏中MDA含量明显下降（P〈0.05）,CTA、SOD、GSH-Px活力明显上升（P〈0.05）。此外,饲料中添加MNC后显著提高了猪肝脏中MT、K＋,Na＋-ATPase和Ca2＋,Mg2＋-ATPase酶活（P〈0.05）。结果表明,MNC能有效吸附饲料中的铅,阻断铅经消化道进入动物体内,改善猪的免疫与抗氧化性能。 相似文献
3.
为了探讨不同铜源对仔猪生长性能和血清微量元素含量的影响,试验选用体重20 kg左右的军牧1号断奶仔猪75头,随机分成A、B、C、D、E 5组,分别为基础日粮对照组（A组）、基础日粮＋125 mg/kg硫酸铜组（B组）、基础日粮＋250 mg/kg的硫酸铜组（C组）、基础日粮＋125 mg/kg蛋氨酸铜组（D组）、基础日粮＋250 mg/kg蛋氨酸铜组（E组）,试验期为45 d。在试验第15,30,45天晨饲前空腹采血,分离血清用于测定有关微量元素含量;测定各组猪生长性能。结果表明：日粮添加铜可显著提高血清铜、锌含量（P〈0.05）,对血清铁含量无显著影响（P〉0.05）;125 mg/kg蛋氨酸铜和125 mg/kg硫酸铜的促生长效应较显著（P〈0.05）,且有机铜优于无机铜。说明添加铜对仔猪生长有一定的意义,建议在基础日粮中添加铜125 mg/kg。 相似文献
4.
试验旨在研究发酵床饲养模式下饲粮中添加抗菌肽对仔猪生长性能、胰腺和小肠内容物消化酶及小肠黏膜二糖酶和垫料蛋白酶、脲酶、铵态氮的影响。选用108头35日龄、体重13kg左右的健康苏钟猪随机分为3组,每组3重复,每重复12头,分别饲喂基础饲粮（对照组）、基础饲粮＋40mg/kg杆菌肽锌＋20mg/kg硫酸黏杆菌素（抗生素组）和基础饲粮＋300mg/kg抗菌肽（抗菌肽组）的试验日粮,试验期49d10结果表明：（1）各组间仔猪生长性能差异不显著（P〉0.05）。（2）与对照组相比,饲粮中添加抗菌肽能够显著提高仔猪胰腺、十二指肠和空肠内容物淀粉酶及空肠内容物胰蛋白酶活性（P〈0.05）;并显著提高仔猪十二指肠黏膜麦芽糖酶和空肠黏膜蔗糖酶、乳糖酶及回肠黏膜蔗糖酶活性（P〈0.05）;抗菌肽组十二指肠黏膜麦芽糖酶活性比抗生素组提高（P〈0.05）。（3）各组间发酵床垫料蛋白酶和脲酶活性及铵态氮含量差异不显著（P〉0.05）。综上所述,本试验条件下,饲粮添加300mg/kg的抗菌肽能够在一定程度上提高仔猪生长性能;提高胰腺、小肠内容物及小肠黏膜消化酶活性;同时不影响垫料蛋白酶、脲酶活性和垫料铵态氮含量。 相似文献
5.
植酸酶和木聚糖酶对断奶仔猪生长性能及蛋白质利用率的影响 总被引：1，自引：0，他引：1
本试验研究了在饲粮中添加植酸酶和木聚糖酶对断奶仔猪生长性能及蛋白质利用率的影响。采用完全随机设计．将90头35日龄的断奶仔猪分为5组．每组3个重复．每个重复6头。5个处理组分别为：（1）玉米-豆粕基础日粮（正对照组．PC），（2）基础日粮-75％磷酸氢钙（负对照组．NC）．（3）负对照组＋植酸酶（植酸酶组，phy），（4）负对照组＋木聚糖酶（木聚糖酶组，xy），（5）负对照组＋植酸酶＋木聚糖酶（植酸酶-木聚糖酶组，phy—xy）．植酸酶的添加量为750U／kg，木聚糖酶的添加量为4000U／kg。结果表明：低磷饲粮添加植酸酶或木聚糖酶后．平均日增重和平均日采食量都得到了明显改善（P〈0．05）．植酸酶和木聚糖酶同时添加对仔猪平均日增重的改善极显著（P〈0．01）。在低磷口粮组单独添加植酸酶或同时添加植酸酶和木聚糖酶极显著提高了蛋白质生物学价值（P〈0．01）。饲粮加酶后，血清尿素氮浓度显著降低（P〈0．05）．添加植酸酶或同时添加植酸酶和木聚糖酶后．血清总蛋白浓度显著升高（P〈0．05）．但添加酶对蛋白质表观消化率无显著影响．总之．在断奶仔猪低P日粮中添加植酸酶或木聚糖酶都不同程度地改善了仔猪生长性能．促进了蛋白质的利用．二酶同时添加对仔猪的平均日增重有显著的协同效应． 相似文献
6.
试验旨在研究饲粮中添加茶树油对育肥猪血清免疫和抗氧化指标的影响。选取64头初始体重为（68.13±0.46）kg的三元杂交育肥猪，随机分为4组，每组4个重复，每个重复4头。对照组饲喂基础饲粮，试验组在基础饲粮中分别添加不同剂量的茶树油（100、200、300 mg/kg），预试期10 d，正试期56 d。结果表明：与对照组相比，第28天200 mg/kg组免疫球蛋白G(IgG)水平显著升高（P<0.05）,100 mg/kg组和200 mg/kg组免疫球蛋白M(IgM)水平显著升高（P<0.05），第56天3个试验组IgG水平均显著提高（P<0.05）;300 mg/kg组血清丙二醛（MDA）含量显著降低（P<0.05）,200 mg/kg组和300 mg/kg组血清谷胱甘肽过氧化物酶（GSH-Px）活性均显著提高（P<0.05）,200 mg/kg组背腰最长肌GSH-Px含量显著提高（P<0.05）。综上所述，饲粮中添加茶树油对育肥猪的血清免疫及机体抗氧化指标有一定调控作用，建议饲粮中适宜添加水平为200 mg/kg。 相似文献
7.
选取180只1日龄樱桃谷肉仔鸭,随机分为6组,每组设三个重复,每个重复10只,安排采食相应的日粮,分别为试验Ⅰ组（基础日粮）、试验Ⅱ组（基础日粮＋400mg/kg儿茶素添加组）、试验Ⅲ组（基础日粮＋800mg/kg儿茶素添加组）、试验Ⅳ组（基础日粮＋1600 mg/kg儿茶素添加组）、试验V组（基础日粮＋800 mg/kgVE添加组）、试验Ⅵ组（基础日粮＋800mg/kg虎杖提取物）,分别对试验前期（14 ～ 28日龄）及试验后期（29 ～ 42日龄）的肉鸭生产性能及血液生化指标进行检测.试验结果表明：各试验组对肉鸭生产性能影响均不显著;各试验组可降低肉鸭血清中尿素氮、血糖、甘油三酯、总胆固醇、低密度酯蛋白的含量,对总蛋白、白蛋白、球蛋白含量无影响（差异不显著）,可提高肉鸭血清中高密度酯蛋白含量,试验Ⅲ组（400mg/kg儿茶素添加组）与试验Ⅳ组（800mg/kg儿茶素添加组）优于其他各添加组,与对照组差异显著,组间差异不显著,表明儿茶素可改善肉鸭血液生化指标. 相似文献
8.
为研究饲料中添加固定化微生物内源酶（MEE）对采食不同能量水平饲粮肉仔鸡生长性能、屠宰性能、血清生化指标和肠道微生物的影响，选用360只1日龄雄性Cobb-500肉仔鸡，随机分为5组：分别为正常代谢能的基础饲粮组（PC组），在基础饲粮中添加750 mg/kg MEE组（PCE组），较基础降低100 kcal/kg的低能饲粮组（NC组），低能饲粮中添加750、1000 mg/kg MEE组（NCE组、NCH组），试验期42 d。结果表明：（1）低能饲粮中添加MEE可使肉仔鸡生长期的体重、平均日增重和饲料效率达到与正常代谢能组相当的水平，饲粮中添加MEE可显著改善饲料效率（P <0.05）。（2）低能饲粮添加MEE可显著降低肉仔鸡21 d血清尿酸含量，显著提高42 d总蛋白含量（P <0.05）。（3）MEE对肉仔鸡的屠宰率、胸肌率、腿肌率和腹脂率均无显著差异（P> 0.05）。（4）基础饲粮添加MEE使肉鸡肠道多尔氏菌、罗斯氏菌等益生菌相对丰度增加，链球菌等有害菌的相对丰度显著降低，低能饲粮中添加MEE会使乳酸杆菌等益生菌相对丰度增加，假单胞菌、肠球菌等有害菌的丰度则相... 相似文献
9.
本试验旨在研究饲粮中添加泛酸对生长獭兔肝脏脂肪代谢的影响。试验选用体重相似的断奶獭兔160只,随机分为4组,每组40个重复,每个重复1只。对照组獭兔饲喂基础饲粮,试验组獭兔分别饲喂在基础饲粮中添加10、20和40 mg/kg泛酸的饲粮。预试期7 d,正试期56 d。结果表明:与对照组相比,饲粮中添加40 mg/kg泛酸显著降低了生长獭兔肩胛、胃周和肾周脂肪沉积率(P0.05);饲粮中添加10~20 mg/kg泛酸显著降低了生长獭兔肝脏中脂滴的含量(P0.05)。饲粮中泛酸添加水平对生长獭兔血浆中总胆固醇和白蛋白的含量无显著影响(P0.05);随着饲粮中泛酸添加水平的升高,生长獭兔血浆中甘油三酯的含量先降低后趋于稳定,20、40 mg/kg添加组显著低于对照组(P0.05);与对照组相比,饲粮中添加20~40 mg/kg泛酸显著升高了生长獭兔血浆中极低密度脂蛋白的含量(P0.05)。与对照组相比,饲粮中添加40 mg/kg泛酸显著增加了肝脏中激素敏感脂酶(HSL)和骨骼肌中脂肪酸转运蛋白(FATP)基因的表达量(P0.05);饲粮中添加20~40 mg/kg泛酸显著增加了肝脏中肉毒碱棕榈酰转移酶1(CPT1)基因的表达量(P0.05);饲粮中添加10~40 mg/kg泛酸显著增加了肝脏中脂肪酸合成酶(FAS)基因和骨骼肌中CPT1基因的表达量(P0.05)。综上所述,饲粮中添加泛酸影响生长獭兔肝脏内脂肪代谢,泛酸添加水平为40 mg/kg时可降低肝脏内脂肪的沉积,并能降低机体脂肪沉积率,增加骨骼肌对脂肪酸的摄取和利用。 相似文献
10.
本试验旨在探讨饲粮中添加甘氨酸纳米硒对肥育猪血清和组织器官抗氧化能力及硒含量的影响。将160头体重约70 kg的杜长大杂交肥育猪随机分为4组,每组4个重复,每个重复10头。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加0.1、0.3和0.5 mg/kg(以硒计)甘氨酸纳米硒的试验饲粮。预试期5 d,正试期60 d。结果表明:1)0.1 mg/kg甘氨酸纳米硒组肝脏、肾脏、胰脏和心脏中谷胱甘肽过氧化物酶活力以及血清中总抗氧化能力和超氧化物歧化酶活力均显著高于对照组(P0.05)。2)与对照组相比,饲粮添加0.3和0.5 mg/kg甘氨酸纳米硒极显著提高了血清及肌肉、肝脏、肾脏、胰脏和心脏中谷胱甘肽过氧化物酶活力(P0.01),同时极显著降低了血清及肌肉、肝脏、肾脏、胰脏和心脏中丙二醛的含量(P0.01);而且,饲粮添加0.3 mg/kg甘氨酸纳米硒还极显著提高了肝脏中超氧化物歧化酶和过氧化氢酶活力(P0.01);饲粮添加0.5 mg/kg甘氨酸纳米硒还极显著提高了胰脏和心脏中总抗氧化能力和超氧化物歧化酶活力(P0.01)。3)0.1、0.3和0.5 mg/kg甘氨酸纳米硒组肥育猪血清及肌肉、肝脏、肾脏、胰脏和心脏中硒含量极显著高于对照组(P0.01)。由此可见,饲粮添加甘氨酸纳米硒能提高肥育猪血清及组织器官的抗氧化能力和硒含量,且以添加水平为0.5 mg/kg时效果最好。 相似文献
11.
Eighteen (Duroc × Landrace × Yorkshire) castrated boars,55 days of age and weighing approximately 19 kg,were used to investigate the effects of montmorillonite nanocomposite on tissue levels of lead as well as changes in blood biochemical parameters in pigs fed lead contaminated diets.The barrows were randomly assigned to one of three treatments (n=6) including a control which were fed a basal diet based on corn and soybean meal.The remaining two groups were fed the basal diet supplemented with 10 mg/kg lead either with or without 0.5% montmorillonite nanocomposite for 50 days.Pigs treated with lead had significantly increased levels of lead in their tissues.Lead accumulated in all tissues of the body with the highest accumulation found in the hair.When montmorillonite nanocomposite was given along with lead,tissue concentrations of lead did not differ from the control.Fecal excretion of lead increased significantly in lead-exposed pigs treated with montmorillonite nanocomposite.A progressive and appreciable accumulation of lead was seen in blood with a concomitant increase in zinc protoporphyrin levels during the course of treatment.However,zinc protoporphyrin levels did not differ from the control when montmorillonite nanocomposite was administered along with lead.The activity of δ-amino levulinic acid dehydratase in blood was significantly increased in lead treated pigs compared with the control.However,in pigs treated with lead and montmorillonite nanocomposite in combination,the activity of δ-amino levulinic acid dehydratase was similar to control pigs.Our results indicate that montmorillonite nanocomposite treatment of pigs exposed to lead resulted in reduced lead concentrations in body tissues.It appears that montmorillonite nanocomposite functions by increasing fecal excretion of lead. 相似文献
12.
Eighteen (Duroc × Landrace × Yorkshire) castrated boars, 55 days of age and weighing approximately 19 kg, were used to investigate the effects of montmorillonite nanocomposite on tissue levels of lead as well as changes in blood biochemical parameters in pigs fed lead contaminated diets. The barrows were randomly assigned to one of three treatments (n = 6) including a control which were fed a basal diet based on corn and soybean meal. The remaining two groups were fed the basal diet supplemented with 10 mg/kg lead either with or without 0.5% montmorillonite nanocomposite for 50 days. Pigs treated with lead had significantly increased levels of lead in their tissues. Lead accumulated in all tissues of the body with the highest accumulation found in the hair. When montmorillonite nanocomposite was given along with lead, tissue concentrations of lead did not differ from the control. Fecal excretion of lead increased significantly in lead-exposed pigs treated with montmorillonite nanocomposite. A progressive and appreciable accumulation of lead was seen in blood with a concomitant increase in zinc protoporphyrin levels during the course of treatment. However, zinc protoporphyrin levels did not differ from the control when montmorillonite nanocomposite was administered along with lead. The activity of δ-amino levulinic acid dehydratase in blood was significantly increased in lead treated pigs compared with the control. However, in pigs treated with lead and montmorillonite nanocomposite in combination, the activity of δ-amino levulinic acid dehydratase was similar to control pigs. Our results indicate that montmorillonite nanocomposite treatment of pigs exposed to lead resulted in reduced lead concentrations in body tissues. It appears that montmorillonite nanocomposite functions by increasing fecal excretion of lead. 相似文献
13.
Jiang SZ Yang ZB Yang WR Gao J Liu FX Broomhead J Chi F 《Journal of animal science》2011,89(10):3008-3015
Zearalenone (ZEA), an estrogenic mycotoxin, is produced mainly by Fusarium fungi. Previous studies indicated that acute ZEA exposure induced oxidative stress and damage in multiple organs. Therefore, the present study was designed to investigate the adverse effects of dietary ZEA (1.1 to 3.2 mg/kg of diet) on oxidative stress and organ damage in postweaning gilts. A total of 20 gilts (Landrace × Yorkshire × Duroc) weaned at d 21 with an average BW of 10.36 ± 1.21 kg was used in the study. Gilts were housed in a temperature-controlled room, divided into 4 treatments, and fed a basal diet only (control) or basal diet supplemented with purified ZEA at a dietary concentration of 1 (ZEA1), 2 (ZEA2), or 3 (ZEA3) mg/kg of diet for 18 d ad libitum. The actual ZEA contents (analyzed) were 0, 1.1 ± 0.02, 2.0 ± 0.01, and 3.2 ± 0.02 mg/kg for control, ZEA1, ZEA2, and ZEA3, respectively. Gilts fed different amounts of dietary ZEA grew similarly with no difference (P > 0.05) in feed intake. Vulva size increased linearly over the 18 d of feeding in gilts fed diets containing 1.1 mg of ZEA/kg or greater (P < 0.001). Relative weight of genital organs, liver, and kidney increased linearly (P < 0.05) in a ZEA-dose-dependent manner. Serum aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, γ-glutamate transferase, urea, and creatinine (P < 0.05), and malondialdehyde concentrations in both serum and liver (P < 0.001) were also increased linearly in a ZEA-dose-dependent manner. However, spleen relative weight (P = 0.002) and activities of total superoxide dismutase and glutathione peroxidase (in both serum and liver (P < 0.05) were decreased linearly as dietary ZEA increased. Results showed that besides genital organs, the liver, kidney, and spleen may also be target tissues in young gilts fed diets containing 1.1 to 3.2 mg of ZEA/kg for 18 d. Increased key liver enzymes in the serum suggest progressive liver damage caused by feeding ZEA, and an increase in oxidative stress in gilts is another potential impact of ZEA toxicity in pigs. 相似文献
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为探讨丁酸钠与β-1,3/1,6-葡聚糖合用对断奶仔猪生产性能和生理代谢的影响,试验选择日龄为(28±3)d的长×大二元断奶仔猪120头,随机分成3个处理,每个处理5个重复,每重复8头猪。3个处理分别为对照组、丁酸钠组和丁酸钠与葡聚糖合用组。结果表明:饲料中单独添加丁酸钠,可显著(P<0.05)提高仔猪后期(15～28d)和全期(0～28d)的日采食量、日增重并改善饲料转化效率,显著(P<0.05)降低腹泻发生率和升高血浆游离脂肪酸、甘油三酯浓度,显著(P<0.05)降低血清葡萄糖浓度,但对血清总蛋白、白蛋白、球蛋白、胆固醇、尿素氮浓度均无显著影响(P>0.05)。丁酸钠与葡聚糖合用,显著(P<0.05)降低了血浆游离脂肪酸含量。 相似文献
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Laia Blavi David Sol Alessandra Monteiro J Francisco Prez Hans H Stein 《Journal of animal science》2021,99(6)
An experiment was conducted to test the hypothesis that inclusion of Cu oxide (Cu2O) in diets for growing–finishing pigs improves body weight (BW) and bone mineralization, and reduces accumulation of Cu in the liver compared with pigs fed diets containing Cu sulfate (CuSO4). Two hundred growing pigs (initial BW: 11.5 ± 0.98 kg) were allotted to a randomized complete block design with 2 blocks of 100 pigs, 5 dietary treatments, 5 pigs per pen, and a total of 8 pens per treatment. Treatments included the negative control (NC) diet that contained 20 mg Cu/kg, and 4 diets in which 125 or 250 mg Cu/kg from CuSO4 or Cu2O were added to the NC diet. The experiment was divided into 4 phases and concluded when pigs reached market weight. Pig weights were recorded on day 1 and at the end of each phase and feed provisions were recorded throughout the experiment. On the last day of phases 1 and 4, 1 pig per pen was sacrificed to obtain samples of liver and spleen tissue, and the right metacarpal was collected. Results indicated that pigs fed diets containing 250 mg Cu/kg from CuSO4 had greater BW at the end of phases 1 and 2 than pigs fed NC diets. Pigs fed diets containing 250 mg Cu/kg from Cu2O had greater (P < 0.05) BW at the end of phases 1, 2, 3, and 4 compared with pigs fed NC diets, and these pigs also had greater BW at the end of phases 3 and 4 than pigs fed all other diets. Pigs fed the diets with 250 mg Cu/kg tended to have greater (P < 0.10) feed intake than pigs fed the NC diet at the end of phase 2, and for the overall experimental period, pigs fed diets containing 250 mg Cu/kg from Cu2O had greater (P < 0.05) feed intake than pigs on all other treatments. However, no differences in gain:feed ratio were observed among treatments. Copper accumulation in liver and spleen increased with Cu dose, but at the end of phase 1, pigs fed 250 mg Cu/kg from CuSO4 had greater (P < 0.05) Cu concentration in liver and spleen than pigs fed 250 mg Cu/kg from Cu2O. Pigs fed diets containing 250 mg Cu/kg from Cu2O had greater (P < 0.05) quantities of bone ash and greater (P < 0.05) concentrations of Ca, P, and Cu in bone ash than pigs fed NC diets or the 2 diets containing CuSO4, but Zn concentration in bone ash was less (P < 0.05) in pigs fed diets containing 250 mg Cu/kg from Cu2O. To conclude, supplementing diets for growing pigs with Cu2O improves growth performance and bone mineralization with less Cu accumulation in liver compared with pigs fed diets containing CuSO4. 相似文献
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为了研究和比较几种不同微生态制剂对生长猪生产性能和血清生化指标的影响,试验选用60 kg左右的杜×长×大三元杂交生长猪150头,随机分为5组,每组设3个重复,每个重复10头,1组为对照组,饲喂基础日粮,2～5组分别在基础日粮中添加75 mg/kg赐美健、0.2%的枯草芽孢杆菌、0.2%金倍素和0.2%嗜酸乳杆菌,进行为期35 d的饲养试验。结果表明:与对照组相比,2～5组平均日增重分别提高0、2.78%、11.11%、9.72%,其中4(0.2%金倍素)组和5(0.2%嗜酸乳杆菌)组显著高于其他试验组(P<0.05);2～5组均有提高总蛋白、白蛋白含量,降低尿素氮含量和提高碱性磷酸酶活性的趋势,其中4(0.2%金倍素)组的总蛋白含量显著高于对照组(P<0.05)。说明在日粮中添加微生态制剂可以提高生长猪生长性能,改善血清生化指标,且以添加0.2%金倍素的效果最佳。 相似文献
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文章旨在评估日粮添加不同水平的饲用枯草芽孢杆菌对9～24周龄育肥猪生长性能、养分表观消化及粪便特征的影响。将600头9周龄平均初始体重为（22.96±0.09）kg的商品猪随机分为3组,每组5个重复,每个重复40头。对照组饲喂基础日粮,T1和T2组肥猪分别饲喂基础日粮+100和200?mg/kg枯草芽孢杆菌（3×108?CFU/kg）,试验共进行15周。结果：与对照组相比,T2组15?w育肥猪体重显著提高4.37%（P＜0.05）,同时T1和T2组1～15?w育肥猪的平均日增重较对照组分别显著提高3.81%和5.35%（P＜0.05）,饲料报酬分别显著提高4.44%和4.44%（P＜0.05）。T1和T2组育肥猪干物质表观消化率分别较对照组显著提高8.75%和9.37%（P＜0.05）,同时T1组育肥猪有机物表观消化率较对照组显著提高了6.13%（P＜0.05）。日粮添加100和200?mg/kg枯草芽孢杆菌可以显著降低6和15?w育肥猪粪便中氨气浓度和大肠杆菌数量（P＜0.05）,同时T1和T2组15?w育肥猪粪便中乳酸杆菌数量也显著高于对照组（P＜0.05）。结论：日粮添加100～200?mg/kg饲用枯草芽孢杆菌（3×108?CFU/kg）可改善9～24周龄育肥猪的饲料报酬,改善干物质表观消化率,降低粪中氨气浓度和大肠杆菌数量。
[关键词]育肥猪|枯草芽孢杆菌|生长性能|养分消化|粪便特征 相似文献
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试验旨在研究镰刀菌毒素污染日粮对断奶仔猪血清酶、肝脏抗氧化功能及组织病理学的影响。选择35日龄体重为(8.45±0.94) kg的健康三元杂交(杜×长×大)断奶雌性仔猪40头,随机分为2组,每组20个重复,每个重复1头猪。对照组饲喂基础日粮,试验组饲喂用霉变玉米和霉变玉米蛋白粉替代基础日粮中50%的玉米和玉米蛋白粉配制而成的镰刀菌毒素污染日粮(玉米赤霉烯酮(ZEN) 0.90 mg/kg,呕吐毒素(DON) 1.43 mg/kg,烟曲霉毒素(FUM) 5.85 mg/kg)。仔猪单栏饲喂,预试期7 d,正试期35 d。结果表明:①与对照组相比,试验组断奶仔猪血清中谷草转氨酶(AST)、谷丙转氨酶(ALT)和碱性磷酸酶(ALP)活性均显著升高(P<0.05),肝脏相对重显著降低(P<0.05);②与对照组相比,试验组断奶仔猪血清和肝脏中谷胱甘肽过氧化物酶(GSH-Px)和总超氧化物歧化酶(T-SOD)活性均显著降低(P<0.05),而丙二醛(MDA)含量显著升高(P<0.05);③病理组织学观察发现,试验组断奶仔猪肝脏出现一定程度的组织损伤,部分肝小叶边缘发生明显的炎性细胞浸润,肝细胞发生局部空泡变性。由此可知,镰刀菌毒素污染日粮(0.90 mg/kg ZEN,1.43 mg/kg DON,5.85 mg/kg FUM)饲喂断奶仔猪可引起仔猪血清酶活性改变,肝脏抗氧化功能降低,肝脏组织出现一定程度的病理损伤,从而影响肝脏功能的发挥。 相似文献