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1.
氨基酸络合铁对生长猪生长性能及有关指标的影响 总被引：3，自引：0，他引：3
为了比较评估氨基酸络合铁对生长猪生长性能、铁表观消化率、肤色和血液指标的影响,试验选择70日龄初始体重(27.34±2.55)kg的杜×长×大生长猪108头,分为6个处理,每个处理6个重复,每个重复3头猪。试验用玉米-豆粕型基础日粮。在基础日粮中添加100 mg/kg无机铁(一水硫酸亚铁)构成对照组。在对照组基础上分别添加40、80、120、160 mg/kg氨基酸络合铁构成4个试验组,在对照组基础上添加160 mg/kg无机铁(一水硫酸亚铁)构成正对照组,试验期5周。结果表明:试验0~2周、3~5周及全期,随着日粮中氨基酸铁添加量由40 mg/kg增加到160 mg/kg,生长猪日增重和饲料转化效率均得到改善,并呈极显著的线性关系(P<0.01)。与无机铁日粮组相比,添加160 mg/kg氨基酸络合铁试验组极显著地改善了平均日增重(P<0.01)和饲料转化效率(P<0.05);试验第14天和第35天,随着日粮中氨基酸络合铁添加水平的增加,生长猪对日粮中铁元素的表观消化率均呈显著的线性增加关系(P<0.05),添加160 mg/kg氨基酸络合铁试验组铁元素的表观消化率极显著高于对照组和正对照组(P<0.01);试验第14天和第35天,随着日粮中氨基酸络合铁添加水平的提高,红细胞压积、血红蛋白浓度、血清铁和血清铁与总铁结合力之比都呈显著的线性增加关系(P<0.05),并高于无机铁日粮组(P<0.01),而血清总铁结合力呈显著的线性降低关系(P<0.05);在试验期末,160 mg/kg氨基酸络合铁日粮组显著改善生长猪的肤色状况(P<0.05)。与添加硫酸亚铁相比,在生长猪日粮中添加氨基酸铁络合物可提高生长猪的生长性能和铁表观消化率,改善皮肤红度及血液生化指标。 相似文献
2.
《黑龙江畜牧兽医》2015,(17)
为了研究日粮中添加蛋氨酸锌(Zn-Met)对冬毛期蓝狐生长性能(日增重、饲料转化率)及毛皮质量的影响,试验采用随机分组的试验设计方法,选用150只体重相近的冬毛期蓝狐,随机分为5组,每组30只。对照组(A组)饲喂基础日粮,试验组在基础日粮中分别以Zn-Met形式添加分别为30 mg/kg(B组)、60 mg/kg(C组)、90 mg/kg(D组)、120 mg/kg(E组)。结果表明:试验组平均日采食量、平均日增重与对照组相比均有所提高;料重比降低,其中B组效果最好且显著高于其他各组(P0.05);试验组鲜皮长度与对照组相比有所增加,试验组鲜皮面积与对照组相比均极显著增加(P0.01);试验组针毛长度均显著高于对照组(P0.05),试验组绒毛长度均显著高于对照组(P0.05),且B组效果最好。说明冬毛期蓝狐日粮中蛋氨酸的最适添加水平为30~60 mg/kg。 相似文献
3.
试验旨在研究抗菌肽(AMP)对固始鸡生长性能、血清抗氧化、免疫及肠道微生物的影响。选取200只固始鸡随机分为4组,每组5个重复,每个重复10只鸡。对照组为基础日粮,试验组分别在基础日粮中添加50、100、200 mg/kg AMP。预试期5 d,正式试验期60 d。结果显示,与对照组相比,各试验组固始鸡末重、平均日增重显著升高(P<0.05),料重比显著降低(P<0.05);200 mg/kg组固始鸡平均日采食量显著提高(P<0.05)。与对照组相比,200 mg/kg组固始鸡血清总抗氧化能力(T-AOC)显著升高(P<0.05);各试验组固始鸡血清谷胱甘肽过氧化物酶(GSH-Px)活性显著提高(P<0.05),丙二醛(MDA)含量显著下降(P<0.05);各试验组固始鸡血清免疫球蛋白G (IgG)、免疫球蛋白A (IgA)、白细胞介素-10 (IL-10)含量均显著升高(P<0.05),血清肿瘤坏死因子-α (TNF-α)和白细胞介素-6 (IL-6)含量显著下降(P<0.05);200 mg/kg组血清白细胞介素-2 (IL-2)含量显著降低(P<0.05)。与对照组相比,各试验组固始鸡盲肠大肠杆菌数量显著下降(P<0.05);200 mg/kg组固始鸡盲肠乳酸杆菌数量显著提高(P<0.05),沙门氏菌数量显著降低(P<0.05);100 mg/kg组、200 mg/kg组固始鸡盲肠链球菌数量显著降低(P<0.05)。研究表明,AMP可提高固始鸡生长性能、免疫与抗氧化能力,改善肠道菌群结构,建议固始鸡日粮中添加200 mg/kg AMP。 相似文献
4.
《福建畜牧兽医》2021,(5)
试验选用400羽1日龄AA肉鸡,随机分为5个处理,每个处理10个重复,每个重复8羽鸡。设对照组(基础日粮组)、A组(基础日粮+50 mg/kg地衣芽孢杆菌)、B组(基础日粮+100 mg/kg地衣芽孢杆菌)、C组(基础日粮+200 mg/kg地衣芽孢杆菌)和D组(基础日粮+400 mg/kg地衣芽孢杆菌)。试验期为42 d。结果表明,试验前期(1～21日龄),添加50 mg/kg芽孢杆菌组和100 mg/kg地衣芽孢杆菌组的ADG高于对照组,添加100 mg/kg地衣芽孢杆菌组的F/G低于对照组,而添加200 mg/kg和400 mg/kg地衣芽孢杆菌组的F/G高于对照组。试验后期(22～42日龄),添加50 mg/kg地衣芽孢杆菌组的ADG高于对照组,而各组间ADFI和F/G差异不显著。从试验全期看,添加50 mg/kg地衣芽孢杆菌组的生产性能好于其它组,并且试验组生产性能随着地衣芽孢杆菌剂量的增加而呈逐渐降低的趋势。所有试验组的半净膛率和全净膛率均高于对照组,并且随着芽孢杆菌添加量的增加而呈逐渐降低的趋势。各试验组腿肌率均低于对照组。除200 mg/kg地衣芽孢杆菌组的腹脂率高于对照组外,其它试验组腹脂率均低于对照组,并且随着地衣芽孢杆菌添加量的增加而呈逐渐升高的趋势。 相似文献
5.
试验旨在研究不同剂量酵母锗对小鼠的毒理毒性,以确定在日粮中的最适添加剂量。试验将40只小鼠随机分为4个组,雌雄各半,每组10只,分别为对照组,试验Ⅰ组、试验Ⅱ组、试验Ⅲ组,试验组每天酵母锗的摄入量分别为40、60 mg/(kg·d)和90 mg/(kg·d),连续饲喂40 d,每天记录每组小鼠的死亡状况及中毒体征。结果表明:摄入低剂量的酵母锗,能够显著提高母鼠的生长性能;中低剂量的酵母锗能够提高公鼠的生长性能(P0.05);酵母锗剂量过高会对小鼠的健康造成不利影响,可能造成小鼠毛色暗淡无光及活动怠动。推荐酵母锗的最高安全摄入剂量为40 mg/(kg·d),可提高小鼠生长性能和健康状况。 相似文献
6.
选取120头28日龄断奶仔猪,随机分成4个处理组,即对照组和3个试验组,每组3个重复,每个重复10头。对照组饲喂基础日粮,试验1组、试验2组、试验3组分别饲喂基础日粮中血红素铁净添加量为27.5mg/kg、55.0mg/kg、85.0mg/kg的3种试验日粮,研究日粮中添加血红素铁对断奶仔猪的生长性能、血液指标(血红蛋白浓度、免疫球蛋白浓度)的影响。试验正试期14d。结果表明,血红素铁各添加量组均能够提高仔猪的生长性能,日粮中血红素铁添加量为55mg/kg时,仔猪平均日增重、饲料转化率较对照组分别提高12.02%和10.27%(P<0.05)。血红素铁对断奶仔猪有良好的促生长作用,也在一定程度上提高了仔猪血液中血红蛋白和IgG浓度。 相似文献
7.
《中国家禽》2021,(11)
试验旨在探讨改性蒙脱石、丝兰提取物、益生菌组成的饲用除臭剂组合对肉鸡生产性能、机体氮代谢和舍内氨气浓度的影响。630只1日龄肉雏鸡随机分为3组,每组3个重复,每重复70只。对照组饲喂玉米-豆粕型基础日粮,试验Ⅰ组在基础日粮之上添加150mg/kg益生菌和125 mg/kg丝兰提取物,试验Ⅱ组在Ⅰ组日粮的基础上再添加2 000 mg/kg改性蒙脱石,试验共56 d。结果显示:与对照组比,试验Ⅱ组显著提高了肉鸡全期日增重和饲料转化率(P0.05),改善效果在生长后期表现尤为明显;试验组均有效地降低了鸡舍氨气浓度(P0.05);在生长后期,试验组皆降低了盲肠内容物尿酸、尿素氮水平和粪中尿素氮含量(P0.05),试验Ⅱ组还降低了粪中尿酸含量(P0.05)。以上结果表明,饲用复合益生菌、丝兰提取物和改性蒙脱石组合能有效调节鸡体氮代谢,降低鸡舍氨气浓度,并改善肉鸡生长性能和饲料利用状况。 相似文献
8.
《中国家禽》2017,(10)
试验旨在研究饲粮不同硒水平对22~42日龄黄羽肉鸡生长性能、抗氧化指标的影响,从而确定快大型黄羽肉鸡饲养中期的最适硒水平。选用22日龄健康、发育良好的快大型岭南黄羽肉公雏鸡1 200只,根据体重随机分为5个组,每组6个重复,每个重复40只,试验组1(对照组)为基础日粮组(硒含量0.037 mg/kg),试验组2、3、4、5饲粮则在基础日粮中分别添加0.075、0.15、0.225、0.30 mg/kg硒,试验期为21 d。结果表明:饲粮添加不同水平硒对试验鸡生长性能无显著影响(P0.05);各硒添加组血浆、红细胞和肝脏谷胱甘肽过氧化物酶(GSH-Px)活力显著高于对照组(P0.05),饲粮添加不同水平硒对试验鸡血浆和肝脏丙二醛(MDA)含量无显著影响(P0.05)。综合考虑,22~42日龄黄羽肉鸡饲粮硒适宜水平为0.337 mg/kg。 相似文献
9.
《中国畜牧杂志》2021,(9)
试验旨在研究枯草芽孢杆菌和富硒酵母对瑶鸡生长性能、屠宰性能、肉品质及舍内环境的影响。选取240只健康1日龄瑶鸡随机分为4组,对照组饲喂基础日粮,试验I、II、III组分别在基础日粮中添加200 mg/kg枯草芽孢杆菌和200 mg/kg富硒酵母、200 mg/kg枯草芽孢杆菌和400 mg/kg富硒酵母、400 mg/kg枯草芽孢杆菌和200 mg/kg富硒酵母,试验期120 d。结果显示:与对照组相比,试验I组瑶鸡平均日采食量和耗料增重比均降低(P0.05),试验I组瑶鸡死淘率也降低(P0.05);与对照组相比,试验II组瑶鸡屠宰率和半净膛率均提高(P0.05);与对照组相比,试验I、II组瑶鸡胸肌失水率、剪切力均降低(P0.05),试验I组pH降低(P0.05);与对照组相比,试验I～III组胸肌中硒含量均提高(P0.05);与对照组相比,各试验组舍内氨气和二氧化碳浓度无显著差异。本试验表明,在日粮中添加枯草芽孢杆菌和富硒酵母可以提高瑶鸡生长性能和屠宰性能,增加肉中硒含量,并改善肌肉品质,其中添加200 mg/kg枯草芽孢杆菌和200 mg/kg、400 mg/kg富硒酵母效果较好。 相似文献
10.
《饲料工业》2017,(12):10-16
试验旨在研究不同酵母锗添加量对仔猪生长性能及养分代谢的影响。试验选用100头断奶日龄22 d、健康无病的杜×长×大三元杂交猪。将体重无显著性差异的100头仔猪RCB分为5组(对照组和试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组),每组20头仔猪,公、母各半,试验组日粮中的酵母锗有效含量分别为15、25、35、45 mg/kg,正式试验周期为42 d,分为三个阶段进行。观察记录仔猪生长情况及腹泻率,并分别在试验开始的第1、15、29、43 d对仔猪进行称重,在每个阶段结束前一天,采用全收粪法采样,分析酵母锗对仔猪的营养成分代谢的影响。结果表明:(1)在生长性能方面,日粮中酵母锗添加浓度达到35 mg/kg时,仔猪的平均日增重、平均日采食量、料重比在各个试验阶段,以及前两个阶段的仔猪腹泻率,均与对照组差异显著或极显著(P<0.05,P<0.01),有效提高了仔猪的生长性能;(2)在养分代谢方面,日粮中酵母锗添加浓度达到35 mg/kg时,仔猪对日粮中干物质、粗蛋白、粗脂肪、粗灰分以及Ca的表观消化率均明显提高(P<0.05),有效提高了仔猪对饲料的利用率。 相似文献
11.
中药负离子硒锗复合生物制剂对蛋鸡生理机能、免疫抗氧化性能的影响 总被引：1，自引：0，他引：1
试验旨在探究中药负离子硒锗复合生物制剂对蛋鸡生理机能和免疫抗氧化性能的影响。选取200只28周龄的健康海兰褐蛋鸡,随机分成2组,对照组饲喂基础日粮,试验组饲喂基础日粮+0.5%中药负离子硒锗复合生物制剂,每组4个重复,每个重复25只鸡,试验期共49 d。结果表明:与对照组相比,试验组血清白蛋白(ALB)和白蛋白/球蛋白(ALB/GLO)分别显著升高了8.33%、11.11%(P0.05);试验组血清总胆固醇(TC)含量显著降低8.68%(P0.05),高密度脂蛋白(HDL)含量显著升高8.24%(P0.05);试验组血清谷草转氨酶(GOT)和谷丙转氨酶(GPT)活性差异不显著(P0.05);试验组血清Ig G含量显著升高4.89%(P0.05);试验组血清超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)活性分别极显著升高23.49%、17.82%(P0.01),血清丙二醛(MDA)含量极显著降低32.08%(P0.01)。综上,蛋鸡基础日粮中添加0.5%中药负离子硒锗复合生物制剂可改善蛋鸡生理机能,提高蛋鸡免疫力和抗氧化性能,且对蛋鸡肝脏无不良影响。 相似文献
12.
试验选择健康1日龄商品代AA肉鸡96只，随机分成试验组Ⅰ、Ⅱ和对照组，每组4个重复，每个重复8只，试验期49 d。1～21日龄阶段，试验组Ⅰ、Ⅱ均饲喂基础日粮＋0.1%苜蓿总甙；22～35日龄和36～49日龄阶段，试验组Ⅰ饲喂基础日粮＋0.1%苜蓿总甙，试验组Ⅱ饲喂基础日粮＋0.2%苜蓿总甙。试验结果如下：①添加苜蓿总甙除22～35日龄试验组Ⅰ肉仔鸡采食量有显著差异(P<0.05)外，其他各试验组各阶段生长性能差异均不显著（P>0.05）。②添加苜蓿总甙对不同日龄仔鸡血清和肝脏GSH-Px、SOD和MDA水平有不同程度地影响。 相似文献
13.
日粮添加荷叶提取物对黄羽肉鸡抗氧化功能及肌肉品质的影响 总被引：1，自引：0，他引：1
本试验选择28日龄岭南黄慢速型黄羽肉鸡1200只,随机分成3组,每组10个重复,公母各半,每个重复40只鸡。对照组饲喂基础日粮,试验组分别饲喂基础日粮添加0.1%和0.2%荷叶提取物,饲养至120日龄出栏,研究日粮添加荷叶提取物对黄羽肉鸡肉品质及抗氧化活性的影响。结果显示,在日粮中添加0.1%荷叶提取物能够显著提高黄羽肉鸡公鸡肌肉pH45 min（P<0.05）及母鸡肉色b* 值（P<0.05）;显著提高公鸡肌肉总抗氧化能力（P<0.05）和谷胱甘肽过氧化物酶（P<0.01）,降低丙二醛含量（P<0.05）;对母鸡抗氧化活性也表现出与公鸡一致的作用趋势,提高胸肌总抗氧化能力（P<0.1）,显著提高GSH-Px活性（P<0.05）,降低MDA含量（P<0.1）。与对照组相比,日粮添加0.2%荷叶提取物也可以显著提高母鸡肉色b* 值（P<0.05）,但对本试验中其他肉品质指标及抗氧化指标均无显著性影响。由此可见,日粮中添加0.1%荷叶提取物可以增强黄羽肉鸡的抗氧化能力,从而改善肌肉品质。 相似文献
14.
This study was conducted to determine the pathological changes in testes and epididymides and plasma testosterone levels of adult roosters during experimentally induced aflatoxicosis. In the study, 24 months of age, 32 Babcock breeder males were used, and they were divided into four groups each containing 8 animals. The groups were designed as follows; group 1: Control, no aflatoxin (AF), group 2: 5 ppm (parts per million) total aflatoxin (AF; B1, B2, G1, G2), group 3: 10 ppm AF and group 4: 20 ppm AF in the diet, and the birds were fed for 8 weeks. Grossly, it was seen that the testes of all AF-treatment groups birds were significantly (P < 0.001) atrophied when compared with those of control birds. Histopathologically, there was no spermatogenesis in the testes of 4, 5 and 6 cocks fed on a diet containing AF 5, 10 and 20 ppm, respectively. Furthermore, abnormal spermatozoa were observed in some of AF-treatment groups (in 2 cases in each of 5 and 10 ppm AF-treated groups, and in one case in 20 ppm AF-treated group). There were also mononuclear cell infiltration and/or focal lymphoid cell accumulation in the intertubular areas of the testes and epididymides in all AF-treatment groups. In conclusion, it has been shown that AF might totally or partially (dose related) suppress spermatogenesis, cause abnormality in spermatozoa and atrophy in testes. Furthermore, there was degeneration and desquamation in the epithelium and decrease in the size and thickness of the germinative layer of the seminiferous tubules, and lowered plasma testosterone levels in adult roosters. 相似文献
15.
Ahmed A. SALEH Yahya Z. EID Tarek A. EBEID Akira OHTSUKA Masahiro YAMAMOTO Kunioki HAYASHI 《Animal Science Journal》2012,83(8):594-598
This study was conducted to show that dietary supplementation of a fungus, Aspergillus awamori called Koji in Japan, reduces skeletal muscle protein breakdown and stimulates growth in broiler chickens. A total of 30 chicks at 15 days of age was divided into control and two treatment groups (10 birds per treatment). Control group was fed basal diet and treatment groups were fed the basal diets supplemented with A. awamori at levels of 0.05% and 0.2%. The birds were raised for 12 days from 15 to 27 days of age and then the effect on growth, organ weights and plasma 3‐methylhistidine concentration and digestibilities of protein and energy was evaluated. The messenger RNAs (mRNAs) of atrogin‐1, ubiquitin, proteasome, m‐calpain, µ‐calpain, β‐actin, myosin and pax‐7 in the breast muscle were also measured. Body weight gain and breast muscle weight were increased, although feed intake was decreased by the fungus and thus feed efficiency was increased. Protein and energy digestibilities were increased. Furthermore, plasma 3‐methylhistidine concentration was decreased by the fungus. The mRNAs of atrogin‐1, ubiquitin, proteasome, m‐calpain and µ‐calpain were all decreased. The mRNA of β‐actin but not myosin and pax‐7 was slightly increased by the fungus. In conclusion, feeding A. awamori improves growth performance because skeletal muscle proteolytic activity is reduced and digestibilities of energy and protein are increased. 相似文献
16.
选用600只1日龄艾维茵肉鸡,随机分成3组,每组2个重复。第1组基础日粮＋30×10－6杆菌肽锌,第2组基础日粮＋20×10－6喹乙醇,第3组喂基础日粮为对照组,试验期42天。结果表明,第1和第2组鸡全或平均日增重较第3组分别提高8．12％（P＜0．05）和6．49％（P＜0.05）,料肉比分别下降10．85％（P＜0．05）和9．43％（P＜0．05）,死亡率分别下降3.97个百分点（P＞O．05）和4.76个百分点（P＞0．05）。第1组与第2组相比各指标差异不显著（P＞0．05）。 相似文献
17.
Carlson MS Boren CA Wu C Huntington CE Bollinger DW Veum TL 《Journal of animal science》2004,82(5):1359-1366
Three experiments were conducted to evaluate the effects of feeding dietary concentrations of organic Zn as a Zn-polysaccharide (Quali Tech Inc., Chaska, MN) or as a Zn-proteinate (Alltech Inc., Nicholasville, KY) on growth performance, plasma concentrations, and excretion in nursery pigs compared with pigs fed 2,000 ppm inorganic Zn as ZnO. Experiments 1 and 2 were growth experiments, and Exp. 3 was a balance experiment, and they used 306, 98, and 20 crossbred pigs, respectively. Initially, pigs averaged 17 d of age and 5.2 kg BW in Exp. 1 and 2, and 31 d of age and 11.2 kg BW in Exp. 3. The basal diets for Exp. 1, 2, and 3 contained 165 ppm supplemental Zn as ZnSO4 (as-fed basis), which was supplied from the premix. In Exp. 1, the Phase 1 (d 1 to 14) basal diet was supplemented with 0, 125, 250, 375, or 500 ppm Zn as Zn-polysaccharide (as-fed basis) or 2,000 ppm Zn as ZnO (as-fed basis). All pigs were then fed the same Phase 2 (d 15 to 28) and Phase 3 (d 29 to 42) diets. In Exp. 2, both the Phase 1 and 2 basal diets were supplemented with 0, 50, 100, 200, 400, or 800 ppm Zn as Zn-proteinate (as-fed basis) or 2,000 ppm Zn as ZnO (as-fed basis). For the 28-d Exp. 3, the Phase 2 basal diet was supplemented with 0, 200, or 400 ppm Zn as Zn-proteinate, or 2,000 ppm Zn as ZnO (as-fed basis). All diets were fed in meal form. In Exp. 1, 2, and 3, pigs were bled on d 14, 28, or 27, respectively, to determine plasma Zn and Cu concentrations. For all three experiments, there were no overall treatment differences in ADG, ADFI, or G:F (P = 0.15, 0.22, and 0.45, respectively). However, during wk 1 of Exp. 1, pigs fed 2,000 ppm Zn as ZnO had greater (P < or = 0.05) ADG and G:F than pigs fed the basal diet. In all experiments, pigs fed a diet containing 2,000 ppm Zn as ZnO had higher plasma Zn concentrations (P < 0.10) than pigs fed the basal diet. In Exp. 1 and 3, pigs fed 2,000 ppm Zn as ZnO had higher fecal Zn concentrations (P < 0.01) than pigs fed the other dietary Zn treatments. In conclusion, organic Zn either as a polysaccharide or a proteinate had no effect on growth performance at lower inclusion rates; however, feeding lower concentrations of organic Zn greatly decreased the amount of Zn excreted. 相似文献
18.
The aim of this study was to explore the effect of different levels of Astragalus polysaccharin on growth performance,intestinal microflora and immune function of immunosuppression broilers.A total of 180 fast large yellow feather chickens with similar weight were randomly divided into 4 groups,with 3 replicates of 15 chicks in each replicate,group Ⅰ was fed with basal diet,free drinking water,groupsⅡ,Ⅲ,Ⅳ were add 200 mg/L water soluble florfenicol in the drinking water,medication for 6 days,then group Ⅱ was fed a basal diet,groups Ⅲ,Ⅳ were fed with basal diet supplemented with 500 and 1000 mg/kg Astragalus polysaccharin,respectively.The pre-trial period lasted for 7 days,and the experiment lasted for 35 days.The results showed that compared with group Ⅱ,groups Ⅲ and Ⅳ was significantly improved the growth performance of immunosuppression broilers （P＜0.05）,enhanced the number of beneficial bacteria （Lactobacillus and Bifidobacterium） in the gastrointestinal tract of immunosuppression broilers （P＜0.05）,reduced the number of harmful bacteria （Escherichia coli and Salmonella） in the gastrointestinal tract of immunosuppression broilers （P＜0.05）,improved the immune organs index and Newcastle disease antibody titer of immunosuppression broilers （P＜0.05）,decreased the serum contents of IL-10 and IFN-γ of immunosuppression broilers （P＜0.05）.In conclusion,adding 500 and 1000 mg/kg Astragalus polysaccharin in diet could eliminate immunosuppression effect of florfenicol test,improve the growth performance,adjust the intestinal micro ecological balance and ennhance the immune function of broilers. 相似文献
19.
Mahmoud G. El Sebaei Nagah Arafat Reham A. El-Shafei Mohamed A. El-Adl Amany Farag Abeer E. Aziza Abdelfattah H. Eladl 《Journal of animal physiology and animal nutrition》2021,105(1):129-139
This study was carried out to evaluate the effects of induced urolithiasis by high dietary calcium (Ca) or protein levels on biochemical analyte levels, redox status, selected inflammatory cytokines and histopathology in chickens. A total of 90 one-day-old white Hy-Line chicks were fed basal control diets containing 20% crude protein (CP) and 1% Ca until they reached 44 days of age. After that, the birds were divided into three groups (30 birds per group). All management factors (light, temperature, ventilation, stock density and diet) were identical among the three groups throughout the study except for the dietary Ca and protein percentages. Group I was fed a control diet containing 20% CP and 1% Ca, group II was fed a high-Ca diet containing 5% Ca, and group III was fed a high-protein diet containing 25% CP. Our findings clearly demonstrated that dietary imbalance (caused by high-Ca or high-CP levels) per se in chickens was physiologically harmful, as it was accompanied by post-mortem lesions; biochemical, redox status and histopathological alterations; and upregulation of inflammatory cytokines (interleukin (IL)-1β and IL-6). In particular, the birds fed the high-Ca diet clearly exhibited the most obvious alterations in most of the endpoints. In conclusion, this study constitutes the first extensive investigation of the effects of high-Ca or high-protein diets induced urolithiasis on growth performance, redox status, inflammatory cytokine levels and pathological characterization in chickens. 相似文献
20.
本试验旨在研究饲粮中添加益生菌对蛋鸡早期生长、饲粮养分利用和肠道菌群的影响。选用540只体重相近且健康的1日龄罗曼褐壳蛋鸡公雏,随机分为3组,每组6个重复,每个重复30只。对照组饲喂基础饲粮,抗生素组饲喂添加0.1 g/kg杆菌肽锌预混剂的基础饲粮,益生菌组饲喂添加1 g/kg益生菌制剂的基础饲粮。试验期70 d。结果表明:1)与对照组相比,益生菌组和抗生素组70日龄体重均显著提高(P0.05),且2组间无显著差异(P0.05)。2)与对照组相比,益生菌组饲粮粗蛋白质的表观利用率提高了8.7%(P=0.054),钙的表观利用率提高了22.96%(P0.05);抗生素组饲粮能量的表观利用率显著提高(P0.05)。3)与对照组相比,益生菌组试验鸡盲肠中微生物菌群的种类数和有益菌丰度均有提高,有害菌丰度有所降低;抗生素组试验鸡的盲肠有害菌丰度降低,但盲肠微生物的丰富度和有益菌丰度也同时降低。由此看出,饲粮中添加益生菌可促进蛋鸡早期的生长,提高营养物质的利用率,改善肠道菌群结构,提高机体生理健康状况,而且益生菌比抗生素更有益于肠道健康。 相似文献