不同公母比对本交笼模式下种公鸡性行为影响的研究

为探究本交笼养模式下种公鸡的行为学特征,了解本交笼种公鸡的行为习惯。该试验在本交笼模式下选择594只50周龄的罗曼粉蛋种鸡,随机分为2组,每组3个重复,每个重复99只鸡,试验1、 2组公母比分别为1∶8和1∶10,连续1周观察各处理组种公鸡的行为,并进行记录和分类统计。结果表明:本交笼养蛋种鸡的交配活动显著发生在下午,同时试验组1鸡只交配频率显著高于试验组2 (P<0.05)。鸡只在一天开灯时间内交配频率的时间分布结果显示,鸡只的交配频率主要集中在16:00—19:00,试验组1在17:00—18:00的交配频率显著高于试验组2 (P<0.05),在18:00—19:00的交配频率则极显著低于试验组2 (P<0.01)。试验组1中公鸡体重略低于试验组2,均匀度和平均交配次数高于试验组2,但差异不显著(P>0.05)。对种公鸡的等级进行划分,试验组1等级地位较高的种公鸡体型偏小,而试验组2等级地位较高的种公鸡体型则偏大;剔除笼内无效种公鸡后,种蛋受精率显著提高(P<0.05)。可见,试验组1种公鸡的均匀度和配种能力要优于试验组2。

淫羊藿提取物对老龄种公鸡精液品质、生殖内分泌激素及繁殖性能的影响

本试验旨在探究不同水平淫羊藿提取物对老龄种公鸡精液品质、生殖内分泌激素及繁殖性能的影响。选取72只体重[(2.94±0.01)kg]相近、健康的65周龄大午金凤父母代种公鸡,随机分成4组,每组6个重复,每个重复3只,单笼饲养。对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ组分别在基础饲粮中添加0.05%、0.10%和0.15%的淫羊藿提取物。饲养试验持续7周。试验第4周(69周龄)和第7周(72周龄)收集精液,测定精液品质;试验第4周和第7周采集血液,测定血清生殖内分泌激素水平;试验最后2周收集合格种蛋以重复为单位入孵,用于测定繁殖性能指标。结果显示:与对照组相比,1)试验第4周时,各试验组种公鸡精子活力显著提高(P<0.05),精子畸形率显著降低(P<0.05);试验Ⅱ、Ⅲ组有效精子数显著增加(P<0.05);试验Ⅱ组精子密度显著提高(P<0.05)。试验第7周时,试验Ⅱ、Ⅲ组种公鸡精液量显著增加(P<0.05);试验Ⅲ组精子活力显著提高(P<0.05)。2)试验第4周时,试验Ⅱ、Ⅲ组精浆谷草转氨酶(GOT)、谷丙转氨酶(GPT)活性显著降低(P<0.05);试验第7周时,试验Ⅲ组精浆GOT、GPT活性显著降低(P<0.05)。3)试验第4周时,各试验组精浆谷胱甘肽过氧化物酶(GSH-Px)活性极显著提高(P<0.01);试验Ⅱ、Ⅲ组精浆总抗氧化能力(T-AOC)显著提高(P<0.05)。试验第7周时,各试验组精浆总超氧化物歧化酶(T-SOD)活性显著提高(P<0.05);试验Ⅱ、Ⅲ组精浆丙二醛(MDA)含量显著降低(P<0.05);试验Ⅱ组精浆T-AOC显著提高(P<0.05)。4)试验第4周时,各试验组血清促性腺激素释放激素(GnRH)水平显著降低(P<0.05),血清促黄体素(LH)和睾酮(T)水平显著提高(P<0.05);试验Ⅱ、Ⅲ组血清促卵泡素(FSH)水平显著提高(P<0.05)。试验第7周时,各试验组血清GnRH水平极显著降低(P<0.01);试验Ⅱ、Ⅲ组血清FSH、LH水平显著提高(P<0.05);试验Ⅲ组血清T水平显著提高(P<0.05)。5)试验Ⅱ、Ⅲ组受精率和入孵蛋孵化率显著提高(P<0.05);试验Ⅲ组受精蛋孵化率和入孵蛋健雏率显著提高(P<0.05),死胚率显著降低(P<0.05)。综上所述,淫羊藿提取物可以通过调控生殖内分泌激素,提高精浆抗氧化能力,减少精子损伤,从而改善精液品质,提高老龄种公鸡的繁殖性能,且其在饲粮中的适宜添加量为0.15%。

论现实题材金鸡奖最佳故事片彰显的精神价值

金鸡奖自1981年设立至今,共36届评出46部最佳故事片,其中现实题材有30部之多,故事涵盖了中国社会不同发展时期的方方面面,折射出当时的社会心理及时代精神。金鸡奖作为国家“专业奖”秉持“二为”方向和“双百”方针,坚守社会主义核心价值观,在思想艺术上代表了我国电影的最高水平,对电影创作及社会心理具有重大影响,在建立主流意识形态方面具有重要价值。金鸡奖最佳故事片彰显的精神价值可以从思想引领力、价值引导力、文化凝聚力、精神推动力四个维度进行分析、探究。

康乐黄公鸡早期体重与繁殖性状的相关性分析

为了揭示康乐黄公鸡早期体重与繁殖性状之间的相关性,试验测定了102只康乐黄公鸡出生和2,4,6,8,10,12,14,16周龄体重及22周龄繁殖性状指标[睾丸质量指标(左侧睾丸重、右侧睾丸重、总睾丸重、左侧睾丸指数、右侧睾丸指数、总睾丸指数)和精液品质指标(精液体积、精子密度)],并分析各性状指标间的相关性。结果表明:康乐黄鸡公鸡各周龄体重的变异系数在3.68%~12.84%之间,繁殖性状指标的变异系数在42.41%~68.43%之间。不同周龄体重间的相关性均达到显著水平(P<0.05),相关系数在0.345~0.958之间;睾丸质量指标(左侧睾丸重、右侧睾丸重、总睾丸重、左侧睾丸指数、右侧睾丸指数、总睾丸指数)间均呈极显著相关(P<0.01),相关系数在0.854~0.979之间;精液体积与8周龄、10周龄、12周龄、14周龄体重呈显著或极显著相关(P<0.05或P<0.01),相关系数在0.313~0.373之间。精子密度与左侧睾丸重、右侧睾丸重、总睾丸重、左侧睾丸指数、右侧睾丸指数、总睾丸指数均呈显著相关(P<0.05),相关系数在0.310~0.350之间。说明康乐黄鸡8周龄、10周龄、12周龄、14周龄体重与部分繁殖性状之间存在相关性。

大骨鸡公鸡各生长阶段不同生长速度对血清生化指标的影响

试验旨在研究大骨鸡公鸡血清生化指标变化规律,分析不同生长速度间的血清生化指标差异。试验将1日龄263羽公鸡饲养至24周龄,自第3周开始,每单周末随机选5只鸡采血,测定血清生化指标。第12周龄,随机取高(H组)、低(L组)体重鸡各12只,准确计量体重并采血测定血清生化指标。结果显示:各周龄公鸡血清白蛋白、球蛋白、总二氧化碳、钙、总胆红素、尿素氮与周龄呈显著或极显著正相关(P<0.05或P<0.01),白球比、总胆汁酸、葡萄糖、无机磷与周龄呈显著负相关(P<0.05)。除血清中谷草转氨酶无显著差异(P>0.05)外,各饲养阶段其他血清指标均有显著差异(P<0.05)。12周龄H组血清中总胆汁酸含量显著高于L组(P<0.05),葡萄糖含量极显著低于L组(P<0.01),体重与血清中总胆汁酸、脂肪酶和葡萄糖呈显著(P<0.05)或极显著(P<0.01)相关。研究表明,试验确定了大骨鸡公鸡各饲养阶段的血清生化指标含量及差异,明确第12周龄大骨鸡公鸡体重与血清中胆汁酸、葡萄糖和脂肪酶有关,并可用数学模型估测体重。

柚皮苷对老龄广西麻鸡种公鸡繁殖性能的影响

试验旨在探究基础日粮中添加不同浓度的柚皮苷对老龄广西麻鸡种公鸡繁殖性能的影响。随机选取60只健康、体况相近的70周龄广西麻鸡种公鸡,随机分为4组,每组15只鸡。对照组饲喂基础日粮,对照组、N1组、N2组、N4组分别在基础日粮中添加0.1%、0.2%、0.4%柚皮苷。正式试验期60d。结果显示:试验第30d后,各试验组种公鸡精液量、精子密度、精子直线运动率及精子活率均显著高于对照组(P<0.05)。试验第60d,N2、N4组种公鸡精子的曲线运动速率(VCL)、平均运动速率(VAP)、直线运动速率(VSL)、头部摆动振幅(ALH)均显著高于对照组(P<0.05)。N2组的受精率显著高于对照组(P<0.05),各试验组的健雏率均显著高于对照组(P<0.05)。与对照组相比,试验第30d时,3个试验组种公鸡血清促黄体素(LH)、睾酮(T)水平均显著提高(P<0.05),N2组促卵泡激素(FSH)水平显著提高(P<0.05);试验第60d时,N2组种公鸡血清FSH、LH水平显著提高(P<0.05),3个试验组种公鸡血清T水平均显著增加(P<0.05)。研究表明,柚皮苷可通过提高老龄广西麻鸡种公鸡的生殖激素水平,改善精液品质及精子运动性能,从而改善其繁殖性能,其中柚皮苷添加量为0.2%时对老龄广西麻鸡种公鸡繁殖性能改善的效果相对更好。

利用白消安制备公鸡生殖前体细胞移植受体的研究

该试验旨在开发适合制备鸡生殖前体细胞移植受体公鸡的方法。试验选用5-7月龄、体重相近、繁殖性能正常的81只岭南黄公鸡进行试验。试验分两次开展,试验一根据公鸡体重计算白消安用量,试验二不以公鸡体重来计算白消安用量,而是每组固定白消安用量。通过分析注射白消安后第15天、30天、45天或60天公鸡的血常规指标、体重、睾丸重、死亡率、曲精细管直径、周长和面积及生育能力,评价白消安直接注射到年轻公鸡睾丸中制备鸡生殖前体细胞移植受体方法的效果。试验一结果表明,注射白消安后第15天仅有1只注射量为1.2 mg/kg的公鸡睾丸部分曲精细管内出现生精细胞减少现象,对血常规指标、死亡率、睾丸大小和重量以及受精率均无影响,而其他鸡只与对照组相比无明显变化。试验二结果表明,公鸡睾丸注射30-50mg/单侧白消安后第15和30天,睾丸大小、重量明显变小,第30天后组织切片分析显示睾丸内精曲细管膜底部和腺腔排空,第45天注射量为30-40mg/单侧的公鸡睾丸内大部分精原干细胞可以恢复,白消安注射组在第15-45天公鸡配种后受精率明显下降,但整个过程中公鸡体重和血常规指标无显著影响。综上表明,公鸡睾丸注射白消安可以清除内源性精原干细胞,且睾丸正常生理生殖功能不受影响,注射剂量为30-40mg/单侧后第30天,公鸡睾丸内精曲小管膜底部和腺腔排空,此时是注射生殖前体细胞最佳时间。

内蒙古清水河塔尔梁壁画墓的年代和壁画题材再考

清水河塔尔梁壁画墓位于内蒙古地区,学界对它们的年代仍未有确切的判断,大约范围定于五代至辽金时期。本文透过研究塔尔梁的历史沿革、墓壁浮雕和壁画题材,把年代定为金代。除此之外,本文亦重新探讨壁画中金鸡玉犬和双头生物的身份和作用。首先,金鸡玉犬主要负担御晨和司夜的职责,与前人认为的卜葬习俗无关。另外,双头生物应该是与四灵组合的勾陈,而非一般认为的伏羲女娲或地轴。

《郑风·风雨》诗旨辨析

历代关于《郑风·风雨》诗旨的解读,主要有“情事说”、“怀人说”与“政事说”等三种解释,其主要分歧在于对诗中“君子”意象的释读,其成因为后世读者在不同时空下的适时接受。从人类学角度入手,通过分析诗中与男女情爱有关的“风雨”、“鸡鸣”两种意象,可知《风雨》本为一首情诗,表现了女子与心上人重逢时的喜悦。“君子”应为女子的心上人。与不得已,早期“情事说”最近《风雨》诗旨。

Comparative Study on Nitrogen Metabolism and the Nitrogen Maintenance Requirement in Lohmann Brown Roosters and Layers

The objective of this study was to in- vestigate the effect of dietary protein level on nitrogen retention and compare nitrogen metabolism in Lohm- ann Brown adult roosters and layers. The nitrogen ma- intenance requirement （Nm ） was determined based on the nitrogen balance. Thirty Lohmann Brown adult roosters and 30 laying hens at 27 weeks of age were randomly divided into five groups of six birds per group. The birds were fed with one of five diets con- taining 10.46%, 11.77%, 13.79%, 16.77% or 18.29% of crude protein. Nitrogen intake, nitrogen retention and nitrogen retention efficiency were higher in roost- ers than in laying hens, and the average nitrogen re- tention rate for groups fed with CP level of 11.77%, 13.79%, 16.77% and 18. 29% was improved by9.14%. The nitrogen maintenance requirement for Lohmann Brown roosters and laying hens at 27 weeks of age were 0.4245 g/d and 0.5059 g/d, respective- ly, and Nm based on average body weight （BW） and metabolic body weight （ BW^Ts ） was 0.2364 g/kg BW and 0. 2739 g/kg BW~＇75 for laying hens and 0. 2754 g/kg BW and 0. 3208 g/kg BW^72 for roost- ers, respectively. The regression equations for daily N gain （NB, protein accretion） vs. daily N intake （NI ） for Lohrnann Brown layers and roosters were NB = 0.3743NI -0.1589（R2 =0.79） and NB =0.6228NI - 0.3151 （ R2 = 0.85 ）, respectively. The results of this study indicate that nitrogen intake and nitrogen reten- tion at the same dietary CP level were higher in roost- ers than in laying hens.

Effects of Different Dietary Crude Protein Levels on Reproductive Performance in Breeder Roosters

[Objective] To investigate effects of different dietary crude protein levels on reproductive performance and find out the optimal additive proportion of crude protein. [Method] A total of 45 New Yangzhou breeder roosters at 21 weeks old were sampled and divided into three groups, namely, low-protein diet group, medium-protein diet group and high-protein diet group. They were fed with diets respectively at crude protein levels of 17.23%, 13.04% and 11.32%. The sperm volume, testicular traits and levels of reproductive hormones were analyzed during the whole repro- ductive period. [Result] The sperm volume, sperm motility and sperm density of the medium-protein diet group were higher than that of the other two groups, and the sperm deformity rate of the medium-protein diet group was lowest. The rooster＇s testicular traits including weight, volume and testis indexes were not significantly affected by different protein levels, but the testis shrank slowly with aging （ P 〈 0.05）. The levels of testosterone （T）, luteinizing hormone （LH） and follicule stimulating hormone （FSH） in plasma were respectively 6.34%, 19.64% and 3.88% higher in the lowprotein diet group than in the medium-protein diet group, and these indexes were respectively 7.20%, 17.54% and 9.84% higher in the low-protein diet group than in the high-protein diet group. But all these differences were not significant. [ Conclusion] The breeder roosters fed with the diet at the crude protein level of 13.04% show better reproductive performance and economic efficiency.

Effects of L-Arginine supplementation on semen quality, testosterone concentration and testes histological parameters of Ross 308 breeder roosters

Objective:To assess the effects of dietary L-Arginine (L-Arg) supplementation on testes histological parameters and semen quality of male broiler breeder.Methods: Twenty male broiler breeders at 37 wk of age were distributed in a completely randomized design with 4 treatments and 5 replicates each. The treatments consisted of 4 dietary levels of L-Arg (0.00, 1.35, 2.33 and 3.22 g/kg of the diet) and fed to birds for 8 wk. At the end of the experiment semen samples were collected by abdominal massage to determination of semen quality. The blood samples were used to determination of serum testosterone concentration at the end of the experiment. Furthermore, testes from each rooster were used to evaluation of their weights and histological parameters.Results:The results of the experiment showed that dietary L-Arg at 2.33 g/kg improved testes weight, semen volume and sperm forward motility in roosters (P<0.05). Besides, serum concentration of testosterone was increased in roosters fed 2.33 g/kg L-Arg (P<0.05). The results of testes histology indicated that seminiferous tubules lumen diameter, leydig cells, spermatides and sperm cells counts were greater in birds received 3.22 g/kg dietary L-Arg (P<0.05). However, the birds fed diet supplemented with 2.33 g/kg L-Arg had greater seminiferous tubules diameter, sertoli and spermatogonia cell counts than other groups (P<0.05).Conclusion:According to the results of this experiment, it is concluded that dietary L-Arg had positive effects on reproductive traits in roosters.

Numerical Analysis of Meat Quality Traits of Ningdu Yellow Rooster

In order to study the meat quality characteristics of Ningdu yellow rooster, the 7 indexes of 120 healthy Ningdu yellow roosters after slaughter at the age of 16 weeks were determined, and correlation analysis, regression analysis and principal component analysis were carried out among the indexes. The results showed that the variation coefficient of PH value was smaller than that of water drop rate and meat colorimetric, and the lactic acid produced by anaerobic glycolysis of glycogen in chicken meat was slower. Through correlation analysis, the 24-hour drip rate was strongly correlated with the 48-hour drip rate (coefficient ≥ 0.7, p ≤ 0.05), and the other indicators were independent of each other. By means of regression analysis, the regression equation (fitting degree R2 = 0.984) of 24- and 48-hour drip rate was established. Principal component analysis synthesized 7 indicators into 3 principal components, with a cumulative contribution rate of 70.13%, indicating that the meat quality of Ningdu Yellow chicken rooster is mainly selected by water drop rate, PH value and meat color test.

Natural astaxanthin enhanced antioxidant capacity and improved semen quality through the MAPK/Nrf2 pathway in aging layer breeder roosters

Background:Natural astaxanthin(ASTA)has strong antioxidant properties and has been widely used as a health product to improve human health.However,the effects of ASTA on the reproductive performance of aging roosters have been poorly studied.We aimed to investigate the effects of dietary ASTA on semen quality and antioxidant capacity in aging roosters and to explore the potential mechanism of semen quality change via antioxidation defense system.Methods:In the present study,9653-week-old Jinghong No.1 layer breeder roosters were fed a corn-soybean meal basal diet containing 0,25,50,or 100 mg/kg ASTA for 6 weeks.Results:Semen quality in the ASTA groups remarkably improved than that in the control group,and antioxidant activities,the abilities to scavenge hydroxyl radicals and superoxide anions,increased gradually with ASTA addition(P<0.05).In addition,the mRNA levels of antioxidant enzymes as well as the mRNA and protein levels of the mitogen-activated protein kinase(MAPK)and nuclear factor-erythroid 2-related factor 2(Nrf2)were markedly increased in the 50-100 mg/kg ASTA group(P<0.05).Conclusions:Collectively,these results demonstrate that dietary ASTA may improve semen quality by increasing antioxidant enzyme activities and the ability to scavenge hydroxyl radicals,which may be related to upregulation of the MAPK/Nrf2 pathway.

A Histological Study on Subacute Toxicity of "Baikening" in Hy-Line Brown Roosters

[ Objective] A histological study was conducted to investigate the toxicity of ＂Baikening＂ and the toxic effect of ＂Baikening＂ on roosters after longer- term administration at different dose levels. [ Method] Thirty 21-day-old Hy-Line Brown roosters were administered with 0.5 and 1.0 ml of ＂Balkening＂ aqueous extract through drinking water once a day for continuous 14 d. Roosters in control group and experimental groups after drug administration for 14 d and drug with- dmwal for 7 d were euthatfized; livers, kidneys, thymuses, spleens and bursas of Fabricius were collected and weighed for comparative analysis. Various tissues were prepared into paraffin-embedded slices and stained by H. E. , to observe histological changes of various organs under an optical microscope. [ Result ] After drug administration for 14 d, all the roosters in experimental groups survived; there was no visible pathological change in various organs of Hy-Line Brown roosters in each group; organ weights of Fly-Line Brown roosters in various groups showed no significant difference; observation results of tissue slices indicated that there was no pathological change in fine structures, nuclei and cytoplasm of various organs of Hy-Line Brown roosters in different groups ; various blood vessels in different organs also presented no change in blood circulation or other pathological changes. [ Conclusion] ＂Baikening＂ aqueous extract （oral administration） has no toxic and side effect on roosters in the subacute toxicity experiment.

Roosters Algorithm:A Novel Nature-Inspired Optimization Algorithm

Some species of females,e.g.,chicken,bird,fish etc.,might mate with more than one males.In the mating of these polygamous creatures,there is competition between males as well as among their offspring.Thus,male reproductive success depends on both male competition and sperm rivalry.Inspired by this type of sexual life of roosters with chickens,a novel nature-inspired optimization algorithm called Roosters Algorithm(RA)is proposed.The algorithm was modelled and implemented based on the sexual behavior of roosters.13 well-known benchmark optimization functions and 10 IEEE CEC 2018 test functions are utilized to compare the performance of RA with the performance of well-known algorithms;Standard Genetic Algorithm(SGA),Differential Evolution(DE),Particle Swarm Optimization(PSO),Cuckoo Search(CS)and Grey Wolf Optimizer(GWO).Also,non-parametric statistical tests,Friedman and Wilcoxon Signed Rank Tests,were performed to demonstrate the significance of the results.In 20 of the 23 functions that were tested,RA either offered the best results or offered similar results to other compared algorithms.Thus,in this paper,we not only present a novel nature-inspired algorithm,but also offer an alternative method to the well-known algorithms commonly used in the literature,at least as effective as them.

饲粮中益生菌的添加对绿壳蛋鸡种公鸡睾丸发育及抗氧化功能的影响

【目的】探究饲粮中添加益生菌(主要成分为芽孢杆菌、乳酸菌和酵母菌)对绿壳蛋鸡种公鸡睾丸发育、血液激素水平及睾丸抗氧化能力的影响。【方法】选取90只30日龄体重相近且健康的绿壳蛋鸡种公鸡为研究对象,将其随机分为2组,每组3个重复,每个重复15只鸡。对照组饲喂基础日粮,试验组在基础日粮中按照千分之一比例添加复合益生菌,饲养周期40周。待种公鸡达到性成熟高峰期时(240日龄),对2组种公鸡的精液品质、睾丸发育情况、血液激素含量及抗氧化酶活性进行测定。【结果】(1)与对照组相比,试验组种公鸡的精子活力较对照组提高了5.6%,精子活率提高了9.5%,畸形率降低了21.4%,p H值也下降了1.5%,但两组间差异不显著(P>0.05);同时,睾丸中生精小管内精子量高于对照组;(2)与对照组相比,试验组种公鸡血清中的睾酮(T)、雌二醇(E2)、谷胱甘肽过氧化物酶(GSH-Px)和超氧化物歧化酶(T-SOD)水平均极显著提高(P<0.01),总抗氧化能力(T-AOC)水平显著提高(P<0.05),而促黄体激素(LH)略有增加,但差异不显著(P>0.05);(3)与对照组相比,试验组种公鸡睾丸组织中Caspase-3和Caspase-9的表达量均有下降,但差异不显著(P>0.05),而细胞增殖和周期相关基因PCNA、CDK2和CyclinD1的表达量均有增加。此外,试验组中抗氧化基因GPX2、GPX3、GPX4、GPX7、GST和GSR的表达量均显著或极显著高于对照组(P<0.01,P<0.05)。【结论】在绿壳蛋鸡种公鸡的饲粮中添加益生菌,可以提高种公鸡的精液品质,增强睾丸的抗氧化能力,对提高种公鸡的繁殖能力有一定的改善作用。

母鸡日粮对皖南三黄鸡公鸡体重、血清生化指标、睾丸形态结构和精液品质的影响

试验旨在研究母鸡日粮对皖南三黄鸡公鸡体重、血清生化指标、睾丸形态结构和精液品质的影响。将60只30周龄皖南三黄鸡公鸡随机分为2组(母鸡日粮组和公鸡日粮组),分别饲喂母鸡日粮和公鸡日粮。试验期8 w。结果显示,试验中期母鸡日粮组公鸡血清钙含量高于公鸡日粮组(P<0.05),而葡萄糖含量则低于公鸡日粮组(P<0.05);试验结束时母鸡日粮组公鸡血清钙含量高于公鸡日粮组(P<0.05),而血清中雄激素含量则低于公鸡日粮组(P<0.05)。公鸡日粮组公鸡睾丸单位面积的间质细胞数量、精液量、精液颜色和精子密度高于母鸡日粮组。研究表明,母鸡日粮将会导致皖南三黄鸡公鸡血清钙含量升高,睾丸间质细胞数量减少,进而导致血清中雄激素水平和精子密度降低。

Ruling the Rooster

WHAT do Nigerian President Goodluck Jonathan, American pop star Beyonce Giselle Knowles and Russian Empress Catherine the Great have in common？ The answer is anyone＇s guess, you might say But any well-read Chinese person would probably tell you in the blink of an eye： all were born in their respective Year of the Rooster, and thus all share the same Chinese astrological sign.

吡咯喹啉醌二钠对种公鸡抗氧化能力及睾丸组织形态的影响

本试验旨在研究饲粮添加不同水平的吡咯喹啉醌二钠(PQQ·Na2)对种公鸡抗氧化能力及睾丸组织形态的影响。试验选用96只健康的440日龄京红1号种公鸡,随机分为4组,每组6个重复,每个重复4只鸡,分别在基础饲粮中添加不同水平(0、0.5、1.0、2.0 mg/kg)的PQQ·Na2。试验期6周。结果显示:饲粮添加1.0和2.0 mg/kg PQQ·Na2可显著提高血清、肝脏、肾脏和睾丸中总超氧化物歧化酶(T-SOD)和谷胱甘肽过氧化物酶(GSH-Px)的活性(P<0.05),显著提高血清、肝脏、肾脏和睾丸清除羟自由基能力(P<0.05),显著提高血清、肝脏和睾丸清除超氧阴离子能力(P<0.05);显著降低血清、肝脏、肾脏和睾丸中丙二醛(MDA)含量(P<0.05);显著提高睾丸生精小管直径和生精上皮厚度(P<0.05)。由此可见,饲粮添加PQQ·Na2可改善种公鸡的抗氧化能力,提高种公鸡睾丸生精小管直径和生精上皮厚度,适宜添加水平为1.0 mg/kg。