<strike id="abvgr"><var id="abvgr"></var></strike>
  1. 国产成人综合久久精品推最新,亚洲人成电影网站色,无遮挡国产高潮视频免费观看,亚洲国产精品18久久久久久,人妻中文字幕av有码在线,国产情侣一区在线,国产日韩一区二区精品,精品国产午夜福利伦理片

    影響長毛兔繁殖能力的原因以及應對措施都有哪些?

    發布日期:2020-03-12 來源:http://www.fshxt.net 發布人:admin

      一、正確選擇種子
      1、 Choose seeds correctly
      不同用途家兔的繁殖力存在明顯差異。例如,有肉、有皮、有肉的兔子的繁殖力一般高于有皮、有毛的兔子。在育種品種的田間選育初期,應注重生產性能(生長率、毛產量等),生殖性能應作為重要內容
      There were significant differences in the fecundity of rabbits for different purposes. For example, the fecundity of rabbits with meat, skin and meat is generally higher than that of rabbits with skin and hair. In the early stage of field breeding, production performance (growth rate, gross yield, etc.) should be emphasized, and reproductive performance should be taken as an important content
      二是全價供應,飲食均衡
      Second, full price supply and balanced diet
      為種兔提供全價、均衡營養和保持良好的身體狀況是提高生育力的重要措施。目前,大多數兔子生產商準備膳食能量、粗纖維可以滿足需求的兔子,但是等微量元素缺乏或不合理使用,導致女兔子不發情,不排卵,受孕率低,即使懷孕,胎兒死亡率、畸形率、流產率也很高,男兔子性欲下降,繁殖能力很差。
      Providing full price, balanced nutrition and keeping good physical condition for breeding rabbits are important measures to improve fertility. At present, most rabbit manufacturers prepare rabbits with dietary energy and crude fiber that can meet the needs, but the lack or unreasonable use of trace elements such as trace elements leads to female rabbits' non estrus, non ovulation and low pregnancy rate. Even if pregnant, the fetal mortality, deformity rate and abortion rate are also very high. The sexual desire of male rabbits decreases and their reproductive capacity is very poor.
    長毛兔
      第三,增加母兔在群體中的比例
      Third, increase the proportion of female rabbits in the population
      3歲以上的老兔子出生率低,幼兔體弱多病,死亡率高。老齡兔在家兔種群中所占比例較大,是部分養兔場年肥力較低的重要原因。及時淘汰老兔子,保持年輕和成熟雌性的優勢,可以提高兔子的繁殖能力。因此,每年必須選擇和培養足夠的備用兔子作為補充。
      The birth rate of the old rabbits over 3 years old is low, the young rabbits are weak and sickly, and the mortality rate is high. The large proportion of aged rabbits in the domestic rabbit population is an important reason for the low annual fertility of some rabbit farms. To eliminate old rabbits in time and maintain the absolute advantage of young and mature females can improve the reproductive capacity of rabbits. Therefore, it is necessary to select and cultivate enough spare rabbits as a supplement every year.
      第四,改進育種技術
      Fourth, improve breeding technology
      兔媽媽發情時,繁殖受孕率高,所以要經常對兔進行發情檢查,及時發現,及時繁殖。交配可以采用重復、重復、血液匹配等自然交配方式,有條件的也可以采用人工授精技術。對長期不發情的個體,除了加強飼養治理外,還要用物理或化學方法進行催情劑。
      When the mother of the rabbit is oestrus, the reproduction and conception rate is high, so it is necessary to check the oestrus of the rabbit frequently, find out in time and breed in time. Natural mating methods such as repetition, repetition and blood matching can be used for mating, and artificial insemination can also be used if conditions permit. For the individuals who do not have oestrus for a long time, in addition to strengthening the feeding management, they should also use physical or chemical methods for oestrogen.
      科學地控制光線和溫度
      Scientific control of light and temperature
      冬季、春季光照時間延長,補充光照每天16小時,有利于兔媽媽發情。各種降溫措施在夏季高溫季節應采取減少高溫的不利影響在繁殖兔子,避免在夏季和縮短懷孕,可有效增加女性兔子”年度生殖胎兒,以提高生育的人口。降低溫度的方法有:在兔房前種植藤本植物;增加兔房通風量。據報道,每100公斤種兔日糧中添加10克維生素C粉,可增強雌雄兔的耐熱性,提高受孕率,增加子代數量。此外,根據埃及的相關報道,在環境溫度達到37℃,濕度為42%的情況下,每公斤飼料中添加35毫克鋅,使母兔的受孕率提高了13.1%,產仔數增加了1.3窩。
      In winter and spring, the time of illumination is prolonged, and the supplement of illumination is 16 hours a day, which is beneficial to the estrus of the mother rabbit. All kinds of cooling measures should be taken to reduce the adverse effects of high temperature on breeding rabbits in summer and avoid shortening pregnancy in summer, which can effectively increase the annual reproductive fetus of female rabbits, so as to increase the population of childbearing. The methods to reduce the temperature are: planting vines in front of the rabbit's room; increasing the ventilation of the rabbit's room. It is reported that adding 10 g vitamin C powder to every 100 kg seed rabbit diet can enhance the heat tolerance of male and female rabbits, improve the pregnancy rate and increase the number of offspring. In addition, according to relevant reports in Egypt, when the ambient temperature is 37 ℃ and the humidity is 42%, 35 mg zinc is added to the feed per kilogram, the pregnancy rate of the female rabbit is increased by 13.1%, and the litter size is increased by 1.3.
      以上就是對如何提升長毛兔繁殖能力的措施的詳細介紹,想要了解更多請點擊官網http://www.fshxt.net
      The above is a detailed introduction of how to improve the reproductive capacity of Angora rabbits. For more information, please click http://www.fshxt.net
    主站蜘蛛池模板: 天天色影网| 又爽又黄又无遮挡的激情视频| 色婷婷成人| 亚洲AV成人一区二区三区在线播放 | 成人综合亚洲国产成人| 美女粉嫩饱满的一线天mp4| 搞黄网站免费观看| 国产午夜福利免费入口| 国产精品女同一区二区| 国产一级片内射在线视频| 苍井空一区二区三区在线观看| 狠狠挺进丝袜杨幂身体| 亚洲AV无码成人精品区日韩密殿| 久久久亚洲欧洲日产国产成人无码| 国产v亚洲v天堂a无| 人成午夜免费视频在线观看| 国产成+人+综合+亚洲专区| 丰满人妻一区二区三区视频53| 日本免费一区二区三区高清视频| 中文字幕亚洲日韩无线码| 女人一级特黄大片国产精品| 欧美精产国品一二三产品价格| 久久综合88熟女人妻| 韩国免费A级毛片久久| 国产一区二区丝袜高跟鞋| 欧美不卡一区二区三区| 色婷婷日日躁夜夜躁| 国产精品久久久久久久久动漫| 久久精品亚洲精品国产区| 福利小视频在线播放| 自拍偷自拍亚洲精品第1页| 日韩av高清无码一区二区三区 | 国产在线精品欧美日韩电影| 精品自在拍精选久久| 久久婷婷人人澡人人爱91| 成人精品视频99在线观看免费| 国产精品视频系列专区| 屁股中文字幕一二三四区人妻 | 人妻在客厅被c的呻吟| 久久男人av资源网站无码| 中文文字幕文字幕亚洲色|