化学阉猪去势法效果好

育肥用的小公猪，长到一定重量，要将其睾丸阉割掉。下面介绍一种化学去势法。这种方法很简单，给10日龄以内的仔公猪注射氯化钠、甲醛溶液混合液，其睾丸就会开始肿胀，5天后自行消肿，约半个月左右，睾丸显著萎缩，并丧失性功能。     

提高野猪繁殖性能的几项措施

1选育 从外貌上看，野公猪毛色灰黑色或褐红色，毛粗稀，耳尖小，嘴尖长，头部和腹部要小，脚高细，背直不凹，牙齿尖锐。同时要求性征表现明显，前躯深广，配种机能旺盛，睾丸发育匀称。年龄在18月龄以上，耐粗饲，采食速度快，食量较大。另外，也可以从刚配完种的野母猪的阴部采集精液进行精子质量检查，要求活力必须在0．6以上。     

亚急性硒中毒对小鼠睾丸组织细胞结构的影响

120只5~6周龄昆明小鼠被随机平均分为4组,试验组分别按0.135 mg/kg(1/80LD50)、0.54 mg/kg(1/20LD50)、2.16 mg/kg(l/5LD50)灌胃亚硒酸钠溶液,对照组灌胃蒸馏水,连续攻毒30 d,每隔10 d各组随机选取10只采样,并对睾丸组织进行光学和超微病理学观察。结果表明:亚急性硒中毒影响小鼠睾丸内生殖细胞的发育,高硒可严重损伤小鼠睾丸曲细精管、生精细胞及间质细胞。睾丸病理组织学观察和超微结构观察,均能检测到处于凋亡状态的生殖细胞,而且凋亡细胞的数量与染硒剂量和染硒时间有关。     

Study on Expression of Bcl-2 and PCNA Genes in Testicular Tissue of Chickens,Quails and Chicken-quail Hybrids

In order to investigate the molecular mechanism of stunted growth testis of chicken (♂) and quail (♀) hybrids. 84 testicular tissue samples of New Roman cocks, male Korean quails and chicken-quail hybrids at different developmental stages were collected,the mRNA expression of Bcl-2 and PCNA genes in testicular tissue of cocks, quails and chicken-quail hybrids at different growth stages were detected using Real-time PCR. The results showed that the Bcl-2 and PCNA genes mRNA expression patterns in testes of chickens and quails at different growth stages were similar.The Bcl-2 gene was fluctuated in a whole, and decreased to the lowest value, then recovered rapidly and remained at a high level. The PCNA gene had a very significant peak value.Compared with the chicken and quail,the expression of Bcl-2 and PCNA genes mRNA in hybrids had no obvious change, which indicated that the pattern of the Bcl-2 gene regulation apoptosis in testis was different from chicken and quail at the hybrid testicular development process, and there was no obvious cell appreciation process.It was suggested that the molecular influencing factors of testicular dysplasia of chicken and quail hybrids were related to the abnormal expression of Bcl-2 and PCNA genes mRNA in testes.The results provided an important reference for the further study of the mechanism of testicular dysplasia between chicken and quail interspecific hybrids.     

种公鸡的饲养管理

只有使种公鸡达到一定的条件，鸡群才会获得良好的受精率。因此，为了获得良好的受精率，需要管理好鸡群，确保种公鸡在各个不同的年龄阶段获得正确的骨架发育、睾丸发育和均匀度，确保控制好种公鸡的饲喂、正确的公母比例以及种公鸡适宜的肥胖程度。     

母鸡觅食去势后猪睾丸引起雄性化的报告

鸡觅食饲料不当,可引起鸡的一些生理变化。朝阳市建平县建平镇一农户韩某居镇兽医站仅一道之隔,家中散养8只母鸡以米糠、玉米面为饲料,每当听到去势猪的叫声,便迅速前去觅食睾丸,先后在两月内有4只母鸡出现打鸣现象。     

浅谈公鸡阉割术

当地某养鸡户饲养公鸡800只，要求阉割后出售，现将手术分述如下： 解剖位置：公鸡的睾丸为于腹腔内肾脏的前方，呈豆型，淡黄色或橙红色。其位置相当与最后两肋骨处，两侧睾丸相距约0．5-1cm，其间有肠系膜，且主动脉及后腔静脉居于其间，所以6个月以上的公鸡血管很发达，不易阉割，常阉割后出血死亡。     

重组人生长激素对幼麝鼠性腺发育影响的研究

本文探索了重组人生长激素（Ｒｅｃｏｍｂｉｎａｎｔｈｕｍａｎｇｒｏｗｔｈｈｏｒｍｏｎｅ，ｒｅｈＧＨ）对幼麝鼠生殖系统发育的影响。结果表明，ｒｅｈＧＨ使试验组麝鼠睾丸间质细胞和精原细胞数量明显增加，曲细精管内的初级精母细胞数量（５６７５，５８５０和１０５０个／标准口径曲细精管，Ｐ＜００１）显著增加；试验组卵巢中生长卵泡数量较多，而且有发育后期的卵泡，对照组卵巢中则没有这种卵泡。     

种公猪的饲养管理要点

(一)种公猪的选育 选择种公猪时,首先确保引种渠道正确、系谱清楚、无疾病隐患、品种纯正、健康.选留后备种公猪时,则应分别在出生、断奶、四月龄、配种前进行选留.种公猪的选育必须符合本品种的体形特征,健康活泼,发育良好,前肢发达、腹部紧凑、后躯丰满、四肢(尤其是后肢)强壮、睾丸发育正常大小一致.种公猪应具有旺盛的性欲,有单睾、隐睾、疝气、包皮肥大或性情恶劣、性欲差的公猪不宜留种.     

猪瘟疫苗的种类及使用注意事项

猪瘟(HCV)是一种急性、热性和高度接触传染的病毒性传染病.其发病特征为发病急,高热稽留和细小血管壁变性,引起全身广发性小点出血,脾梗死,是一种危害性极大的传染病,在我国被列为一类动物疫病(农业部第1125号公告).