小檗碱(berberine, BER)是中药黄连的主要有效成分,能够抑制消化道的有害菌,本研究旨在深入探讨不同剂量BER对肉鸡采食和促生长代谢方面的作用及其机理,为生产应用提供植物源新型、高效、安全的畜禽促生长代谢调节剂.

通过体外培养研究不同水平大豆油(2%、4%、6%、8%,依次为l、2、3和4组)在精粗比为30:70(偏粗型)日粮条件下对总产气量、甲烷产量、pH值和纤维降解率的影响.结果表明:随着大豆油添加水平的提高,总产气量、甲烷产量逐渐降低,且各试验组明显低于对照组.试验组pH值与对照组相比,2组除个别时间点(6、10和24 h)外,差异均显著(P<0.05);3组除10 h外,差异显著或极显著(P<0.05,P<0.01);4组除10 h外,差异均极显著(P<0.01).培养24 h后,4组对纤维降解率的抑制潜力最大(P<0.01),其次是3组(P<0.05).大豆油的最适添加水平为4%.

<正>自古以来,野禽就生活于自然光照之下,每年春季,当日照逐渐延长,增加光照之后,母禽开始产蛋孵化、繁殖后代。可见,光照是鸡赖以生存的环境中最重要的因素之一,对鸡的影响极大,特别是蛋鸡对光源性质和光照强度都有着特殊的敏感性和

<正>分支氨基酸(Branched Chain Amino Acid,BCAA)是一组在碳链上具有支链结构的脂肪族中性氨基酸,包括亮氨酸(Leu)、异亮氨酸(Ile)和缬氨酸(Val)等动物体内不能合成的必需氨基酸。BCAA是唯一的主要在肝外组织氧化的必需氨基酸,主要氧化部位在肌肉[1]。

<正>多糖被认为是一种广谱的非特异性免疫促进剂,能够增强人体的细胞免疫和体液免疫功能,可激活巨噬细胞,促进抗体的形成,激活补体及诱导产生干扰素等。利用多糖来提高养殖动物的免疫功能和机体防御能力,从而达到

抗生素作为饲料添加剂对饲料工业及畜牧业的发展做出了不可磨灭的贡献,但随着科学认识的深入.人们发现,抗生素的使用可引起动物内源性感染或二重感染、耐药菌株的产生、畜禽的细胞免疫和体液免疫功能下降以及在畜禽产品中的残留等问题.

Vitamin E,vitamin C and procaine were applicated to regulate embryonic the growth and development of laying hens in this study.225 eggs were divided at random into three groups,the control group did not take any treatment,the test group 1 was injected(78%VE 14 μL+25%VC 20 μL)/egg,the test group 2 was injected(78%VE 14 μL+25%VC 20 μL+2% procaine 56 μL)/egg.Before incubating,eggs blunt end 1 / 4 near the gas chamber,regulating fluid was injected into eggs.That changes of endocrine metabolism,antioxidant property,immune property and production performance were observed in laying hens.The results showed that,compared with control group,at 15 weeks of age,serum follicle-stimulating hormone(FSH) and luteinizing hormone(LH) concentration in treated group 1 significantly increased(P0.01),serum thyroid hormone(T4) concentration in treated group 2 significantly increased(P0.05).At 39 weeks of age,serum T4 concentration in treated groups increased differently,and serum progesterone(P),LH and Glucagon(Glu) concentration significantly increased(P0.05).Serum and liver MDA level in treated groups decreased differently,especially serum MDA in treated group 2 significantly decreased(P0.05),but had no significant effect on other indices measured.Yolk cholesterol content of treated group 2 significantly decreased by 16.58%(P0.05) and yolk adipose content of treated group 1 significantly decreased by 13.51%(P0.05).Antibody titer on 7,14,28 d after injecting Newcastle disease(ND) bacterin increased differently in treated groups,especially those of 7 d and 14 d in treated group 1 significantly increased(P0.01).During 22-39 weeks of old,average egg weigh and total egg production of treated groups increased,especially treated group 1 significantly increased by 7.93%(P0.01) and 6.00%(P0.05),respectively.Feed/egg ratio significantly decreased in treated groups(P0.05).Eggshell thickness in treated group 1 increased by 8.82%(P0.05).The results implied that endocrine level and antioxidation performance in laying hens can improve by regulating the embryonic metabolism,then laying performance enhance as well.

外源性生物活性肽(eBAP)是饲料或食物中的某些蛋白质所隐含的一种特殊肽质,这些特殊肽在消化酶作用下释放出来,以肽的形式被吸收后,参与摄食、消化、代谢及内分泌调节等多种生理作用.

采用全收粪法,通过测定饲料中各种成分的消化率,研究在饲粮中添加不同含量植酸酶对仔猪生长性能和消化率的影响.设置3个添加水平组和1个对照组,1、2、3组分别添加植酸酶1 000、600和300 IU·kg-1,每纽设2个重复,每个重复8头.结果表明,在饲料中添加一定量的植酸酶,能促进仔猪生长,提高日增重和饲料转化率,而且饲料中粗蛋白、灰分、钙和磷的消化率都有明显提高(P＜0.05),并确定植酸酶的最适添加量为600IU·kg-1.

[Objective] The aimed to study the effects of phytase on the growth performance of piglets and their digestibility in the various components in feed.[Method] The 64 40-day-old DYL piglets were randomly divided into 4 groups with 0,1 000,600 and 300 IU/kg phytase supplementation in feed and the their digestibility in various components in feed were determinded by the method of total feces collection.[Result] The mean daily weight gain in the test groups with 1 000 and 600 IU/kg phytase supplementation were higher than that in CK and the test group with 300 IU/kg phytase supplementation.The digestibility ofphosphorous in the test groups with 600 IU/kg phytase supplementation was increased from 52.89%(CK) to 62.78%(P<0.05)and that of crude protein,ash and calcium were increased significantly(P<0.05).The optimum amount of phyatase addition in feed of piglets was confirmed as 600 IU/kg.[Conclusion] Adding proper amounts of phytase in feed could promote the growth of piglets,increase daily weight gain and feed conversion rate.And it also significantly improved the digestibility of crude protein,ash,calcium and phosphorous in feed by piglets.

Hens are sensitive and responsive to the exposure of light especially under different conditions such as photoperiod,duration and strengthen of light and the light itself as well.Proper lightening plays an important role in hens'activity and substance metabolism,thus the growth and production of hens.Furthermore,the light could stimulate the sexual hormones secreting of hens which speeding up the shaping and ovulating of ova,enhancing the layer capability.This paper summarized a set of administrative approaches on the exposure of hens which was of crucial importance to the breeding of hence.

120头育肥后期杜(长本)去势三元杂交商品猪均分为3组,每组40头,组内设4个重复,每个重复10头,公母各半。分别饲喂以基础日粮(组I)、基础日粮+0.01%XOS(组Ⅱ)、基础日粮+0.03%XOS(组Ⅲ)。结果表明:组Ⅲ的胴体瘦肉率比组Ⅰ和组Ⅱ高1.52(P<0.05)和1.77个百分点(P<0.05),胴体中骨比率高1.56(P<0.05)和0.53(P<0.05)个百分点,脂肪比率低2.65(P<0.05)和2.69个百分点(P<0.05),6、肋膘厚降低0.59cm(P<0.05)和0.3cm(P<0.05),饲料中添加XOS可使7肉色改善,肌肉pH、嫩度、肌内脂和系水力各组间差异不显著。

In order to ensure the source of milk quality and food safety, checking 42 pastures randomly found that poor milking environment, the scene mismanagement and artificially adulterate serious problem. Alcohol experiment failed and dry matter was low, alcohol was 48.27 tons of milk, low milk 54.36 tons of dry matter, dairy cattle farmers and dairy enterprise can pay more attention.

在现代养鸡生产中,肉鸡的高生长率在给生产者带来巨大的经济效益的同时,也使肉鸡对各种环境因素高度敏感,其中,热应激的危害较大,轻者生长受到抑制,重者大批死亡,造成较大的经济损失.高温导致鸡热应激,使其生理机能发生变化和紊乱,引起鸡采食量下降,生长速度减慢,饲料转化率降低,影响肉鸡的饲养效益.

<正>长期以来,人们普遍认为食物或饲料中的蛋白质必须在消化道中分解成游离的必需氨基酸或非必需氨基酸,才能被机体吸收和利用。然而近几十年的研究实践表明,以旧的蛋白质氨基酸理论为基础配制日粮不仅不能获得最佳生产性能,而且动物对饲料中各种氨基酸的利用程度并不完全受单一限制性氨基酸水平的影响,也并不完全遵循营养

溶菌酶(Lysozyme),法定编号:EC 3.2.1.17,美国化学文摘服务社(CAS)编号[9066-59-5],又称胞壁质酶或N-乙酰胞质聚糖水解酶,是一种安全性很高,具有一定保健作用的蛋白酶.它广泛存在于鸟类和家禽的蛋清中,哺乳动物的泪液、唾液、血浆、乳汁、胎盘、体液及组织细胞内,其中以蛋清中含量最丰富(约0.3 %) .

1 硒在动物体内的分布与代谢 1.1硒在动物体内的分布 动物所有组织和细胞中都含有硒,含量视组织和饮食硒水平而有差异.不同组织中,硒在细胞内的分布不同,肝脏硒较均匀地分布在细胞颗粒和可溶部分中,而在肾皮质中近75%的硒集中在核部分随饲料中硒水平的改变而有所变化.

The effects of three different levels (0.002%, 0.004% and 0.006%) of xylo-oligosaccharide (XOS) addictives on the production performance and carcass traits of AA broilers were investigated. The results showed that compared with control group, body weight of the broilers in other three experimental groups added with XOS increased by 19.63% (P<0.01), 24.34%(P<0.01) and 34.42% (P<0.01) respectively; feed intake increased by 9.8% (P<0.01), 12.7% (P<0.01) and 16.05% (P<0.01) respectively; feed-weight ratio decreased by 8.9% (P<0.05), 11.1%(P<0.01) and 13.6% (P<0.01) respectively. The differences in slaughter quality, total eviscerating rate and half eviscerating rate were not significant. Ventral fat rate decreased by 27.19% (P<0.05), 22.37% (P>0.05) and 24.54% (P<0.05) in three experimental groups respectively. The most suitable additive quantity of the XOS is 0.006% experimental group.

<正>在集约化的养殖中,动物产品的药物残留问题引起人们高度重视,无公害养殖成为养殖业发展的必然趋势,无公害饲料添加剂的开发研究成为饲料科技的一个热点。随着生物技术的发展,一种高品质

The distribution of vasoactive intestinal peptide(VIP) positive cells in the gastrointestinal tract of Laiwu black goat was compared and observed.The immunohistochemical method was used to show the distribution of VIP in the layers of various sections of gastrointestinal wall.The VIP positive cells were mostly distributed in the cardia,and then the colon,jejunum,pylorus,caecum,rectum and fundus;in the duodenum,ileum and esophagus,the VIP positive cells were not found.Moreover,the forms of VIP cells are diverse: some have the shapes as ellipse or cone,some extend up to other cells nearby,and others to epidermic cells.