女贞子、五味子、四君子汤和大豆黄酮对蛋鸡在热应激状态下抗氧化功能的影响   总被引：12，自引：0，他引：12  

马得莹  单安山  陈志辉 《动物营养学报》2005,17(2):23-27

试验选用59周龄海兰褐蛋鸡96只,随机分为6个处理组,试验1～3组分别添加1%的女贞子、五味子和四君子汤,试验4组添加10mg/kg的大豆黄酮,试验5组添加5mg/kg黄霉素,试验6组为对照组。研究这几种中草药及大豆黄酮对蛋鸡在热应激状态下抗氧化功能的影响及其机理,同时比较这几种中草药、大豆黄酮和黄霉素的作用效果,试验期为4周。鸡舍内平均温度为(32.0±0.5)℃,相对湿度为50%～70%。结果表明:1)女贞子、五味子、四君子汤和大豆黄酮显著提高了热应激状态下蛋鸡的产蛋率(P<0.05),女贞子和五味子显著降低料蛋比(P<0.05)。2)女贞子、五味子、四君子汤和大豆黄酮能显著降低蛋鸡组织、血清和蛋黄中脂质过氧化物含量,表明这几种药物对热应激引起的蛋鸡脂质过氧化状态有明显改善作用。3)女贞子、五味子、四君子汤、大豆黄酮和黄霉素对蛋鸡组织与血清中过氧化物歧化酶活性无明显影响,但能显著提高谷胱甘肽还原酶活性,表明这几种药物可通过提高GR活性,清除热应激蛋鸡体内LPO,维持机体正常功能状态。4)女贞子、五味子、四君子汤、大豆黄酮和黄霉素对蛋鸡组织与血清中谷胱甘肽含量无明显影响。  相似文献   

蛋重和蛋形指数对黑凤鸡种蛋孵化率的影响   总被引：4，自引：0，他引：4  

魏华颖 《青海畜牧兽医杂志》2003,33(3):20-21

测量了黑凤鸡种蛋的蛋重和蛋形指数，研究蛋重和蛋形指数对黑凤鸡种蛋孵化率的影响。结果表明：黑凤鸡种蛋蛋重在36．8。46．9g，蛋形指数在0．675--0．789孵化率较高。  相似文献   

Effects of yeast cell wall on early production laying hen performance     

《The Journal of Applied Poultry Research》2013,22(4):792-797

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米糠、锯末与蛋鸡粪堆肥过程中氮素的变化特征   总被引：2，自引：0，他引：2       下载免费PDF全文

李有建  廖新俤  吴银宝 《家畜生态学报》2013,34(5):32-36

探讨米糠、锯末与蛋鸡粪堆肥过程中氮素的变化特征,旨在为制定蛋鸡粪堆肥规模化生产中减少氮素损失、减少氨气挥发的调控措施提供科学依据。试验设4个处理,蛋鸡粪-米糠、蛋鸡粪-锯末,隔天翻堆1次;蛋鸡粪-米糠-锯末、蛋鸡粪-锯末,每天翻堆1次,定期测定物料理化指标。研究表明,堆肥过程中,铵态氮向硝态氮转化受抑制,氮素转化以有机氮与铵态氮间的相互转化以及铵态氮以氨气形式挥发为主,铵态氮主要以氨气形式挥发造成全氮损失。氮素转化与损失与堆肥温度、pH、O2等环境参数有关,高温、高pH促进氨气挥发;充足的氧气可促进铵态氮向微生物量态氮(有机氮)转化。这些参数主要受堆体结构对堆肥氧气供应和有机质分解的影响。因此,可以尝试在米糠和锯末中添加来源广泛的秸秆类辅料,通过改善堆体结构(容重)来减少氮素损失。  相似文献   

Genetic Parameters of Disease Incidence,Fertility and Milk Yield of First Parity Cows and the Relation to Feed Intake of Growing Bulls     

R. Wassmuth  D. Madsen  P. Jensen  P. Jensen 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(2):93-102

Abstract

Not much is known about the effect of light sources on behavioural development of laying hens. The effect of natural and artificial light, respectively, on feeding and perching of layers was studied. 126-day-old chicks were divided into 1) A8: 8h artificial light+16h darkness, 2) A16: 16h artificial light+8h darkness, 3) N8: 8h daylight+16h darkness. A8 and N8 birds did not differ in their feeding behaviour, whereas the mean proportion of A16 birds feeding was 0.056 lower than in A8 birds in daytime (P<0.001) and 0.019 lower in nighttime (P<0.0001). N8 birds tended to start nighttime perching earlier than A8 birds (hazard ratio=8.5; P=0.056). These results suggest that chicks can change their feeding behaviour depending on day length. Natural daylight was found to precipitate the onset of nighttime perching in the life of the pullet.  相似文献   

大豆黄酮对产蛋鸡生产性能、血液指标及激素分泌的影响   总被引：5，自引：0，他引：5  

赵凤岐  黄毅  曹谨玲  车向荣 《核农学报》2008,22(6):892-897,912

选用44周龄海兰褐商品蛋鸡208只,随机分为4组,分别在基础日粮中添加大豆黄酮0、5、10和15mg/kg,研究了日粮中添加不同水平大豆黄酮对不同时期产蛋鸡生产性能及相关激素水平、血液生化指标及激素分泌的影响。结果表明:添加大豆黄酮在试验各期均可以提高产蛋率、改善料蛋比,15mg/kg组可以显著提高日产蛋量;10和15mg/kg组可以显著提高游离三碘甲状腺原氨酸(FT3)水平,极显著提高游离甲状腺素(FT4)水平;5mg/kg组极显著降低血清IGF-1含量,15mg/kg组极显著提高血清IGF-1含量,各处理组血清胰岛素水平均极显著高于对照组;随着大豆黄酮添加量的增加,血清总胆固醇、甘油三酯、血清低密度脂蛋白胆固醇、血清高密度脂蛋白胆固醇、血糖、血清尿酸呈递减趋势。大豆黄酮可以明显改善44-56周龄海兰褐蛋鸡的生产性能、内分泌激素水平,并降低血液中胆固醇含量。  相似文献   

Salmonella Enteritidis flagellar mutants have a colonization benefit in the chicken oviduct     

《Comparative immunology, microbiology and infectious diseases》2017

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Effects of distillers dried grains with solubles and mineral sources on gaseous emissions     

《The Journal of Applied Poultry Research》2014,23(1):41-50

Distillers dried grains with solubles (DDGS), an important ethanol industry co-product, has been used as a high-protein feed in poultry production. Limited studies exist on their effect on air emissions, however. In the current study, 4 diets (2 × 2 factorial design: 0 or 20% DDGS + inorganic or organic mineral sources) were fed to Hy-line W36 hens from 50 to 53 wk of age and the effects of DDGS level and mineral sources on air emissions were monitored continuously for a 23-d period in environmentally controlled chambers. The NH₃, H₂ S, CH₄, nonmethane hydrocarbons, N₂ O, CO₂, and CO₂-equivalent emissions ranged from 0.51 to 0.64 g/day-hen, 0.71 to 0.84 mg/day-hen, 33.9 to 46.0 mg/day-hen, 54.1 to 60.0 mg/day-hen, 66.0 g to 72.2 g/day-hen, and 83.1 to 92.1 g/day-hen, respectively. Feeding DDGS to laying hens resulted in 14% decreased NH₃ emissions but a 19% increase in CH₄ emissions without affecting other gaseous emissions. More than 30% of N, 80% of P, 80% of K, and 50% of Ca was retained in the manure. In conclusion, feeding laying hens a diet containing 20% DDGS may be beneficial for the environment. Substitution for organic trace minerals did not affect hen performance or air emissions.  相似文献   

Dietary Supplementation with Microencapsulated Lutein Improves Yolk Color and Lutein Content in Fresh and Cooked Eggs of Laying Hens     

Chao Wen  Yue Su  Zhengguo Tao  Zongjia Cheng  Di Zhou  Tian Wang  Yanmin Zhou 《The Journal of Poultry Science》2021,58(2):97

This study was conducted to compare the efficacy of diet supplemented with non-microencapsulated lutein (NL) and microencapsulated lutein (ML) in laying hens. A total of 270 Hy-line Brown laying hens (54 weeks old) were allocated to three groups with six replicates of 15 hens and were adapted to a wheat-soybean meal basal diet for two weeks. Next, the control birds were fed the basal diet, and the test birds were fed the basal diet supplemented with 600 mg/kg NL (12 mg/kg available lutein) or 90.1 mg/kg ML (10 mg/kg available lutein) for 35 days. Supplementation of lutein did not affect the productive performance of laying hens, but improved (P<0.05) the yolk color and red/green value (a*), with eggs from the ML group displaying improved color and a* values from the 15^th day of the experimental period. The blue/yellow value (b*) for the yolk showed an increase (P<0.05) through both NL and ML supplements. The yolk color of fried and boiled eggs and a* value of the yolk in fried eggs were improved (P<0.05) only through ML supplemented diet. Both NL and ML supplements resulted in lower (P<0.05) lightness and higher (P<0.05) a* values of yolk in boiled eggs, as well as higher (P<0.05) b* values in fried and boiled eggs. Yolk lutein content in fresh, fried, and boiled eggs was increased (P<0.05) in NL and ML groups with the latter being higher. In conclusion, ML improved yolk pigmentation and lutein retention in laying hens better than NL.  相似文献   

光照强度对Kisspeptin及其受体GPR54在鸡脑表达的影响   总被引：1，自引：0，他引：1  

刘海斌  吴占福  张立永  官丽辉  陈宝江  胡满 《中国兽医学报》2019,(3):497-506

随机选用100日龄京红Ⅰ号蛋鸡,分别接受光照强度30,20,10,1 lx处理,运用免疫组化技术测定Kisspeptin和GPR54免疫反应阳性神经元在鸡中脑和间脑的分布和表达。结果显示:Kisspeptin免疫反应阳性神经元主要分布于中脑SGC、Imc、Ipc、顶盖前核(Pt)、外侧螺旋核(SPL)。在SGC、Imc、Ipc,平均灰度值和面积百分比,30,20 lx组显著高于10,1 lx组(P<0.05),在Pt和SPL,30 lx平均灰度值和面积百分比最高。GPR54免疫反应阳性神经元主要分布于中脑的lmc、Ipc、SP/IPS、nbor、SGC,平均灰度值和面积百分比,光照强度30,20 lx组显著大于l0,1 lx组(P<0.05)。Kisspeptin免疫反应阳性神经元主要分布于间脑的下丘脑后内侧核(MPH)、丘脑室旁核前部(PVa)、PHN、PVN、Rot。在Rot、PHN、PVN和PVa,Kisspeptin免疫反应阳性神经元平均灰度值和面积百分比,30,20 lx组显著大于l0,1 lx组(P>0.05);在MPH,30 lx高于20 lx,20 lx高于10 lx,10 lx高于1 lx组。GPR54免疫阳性神经元主要分布于鸡间脑PVN、GLv、Rot、PHN和CPa。平均灰度值和面积百分比在Rot,30 lx组最大,但各组间差异不显著(P>0.05),在PVN、PHN、GLv和CPa,30,20 lx组显著大于10,1 lx组(P<0.05)。Kisspeptin免疫反应阳性细胞在腺垂体的平均灰度值,光照强度20 lx组最大,面积百分比30 lx最大,但差异不显著(P>0.05)。结果表明,光照强度能促进Kisspeptin和GRP54在蛋鸡中脑和间脑表达,随光照强度增加,表达量增加。Kisspeptin接受光信息调控,通过调节GnRH分泌,参与调节鸡的生殖机能。  相似文献