<blockquote id="o00vk"></blockquote>
  • <p id="o00vk"></p>
    <cite id="o00vk"><rp id="o00vk"></rp></cite>
    <sub id="o00vk"><rt id="o00vk"></rt></sub>
    国产xxxxx免费视频,少妇人妻偷人精品系列,国产在线不卡精品网站,69国产精品久久久久久人妻,人妻18毛片A级毛片免费看,538porm在线看国产亚洲,国精品91人妻无码一区二区三区,欧美性猛交XXXX乱大交

    長毛兔養殖對于光照的要求

    發布日期:2014-11-18 來源:http://www.tunjie.cn 發布人:admin

    光照對長毛兔的生理機能有著重要調節作用。適宜的光照有助于增強長毛兔的新陳代謝.增進食欲,促進鈣、磷的代謝作用,光照不足則可導致長毛兔的性欲和受胎率下降。此外,光照還具有、保持兔舍干燥和預防疾病等作用。
    Light the physiological function of the Angora rabbit plays an important regulatory role. The optimum light helps to enhance the Angora rabbit The new supersedes the old.. Increase appetite, metabolism and promote calcium, phosphorus, light deficiency can lead to Angora rabbit sexuality and pregnancy rate decreased. In addition, the light also has bactericidal, keep the effect of rabbit hutch drying and disease prevention etc..
      生產實踐表明,公母兔對光照要求是不同的。一般而言,繁殖母兔要求長光照,以每天光照14~16小時為好,表現為受胎率高,產仔數多,可獲得更佳的繁殖效果。種公兔在長光照條件下,則精液品質下降,而以每天光照10~12小時效果更好。
    The production practice shows that the male and female rabbit is different to light. In general, reproductive female rabbits require long illumination light to every 14~16 hours for the good performance for the pregnancy rate is high, the litter number, can obtain the best effect of reproduction. Male rabbits in long photoperiod conditions, then decreased semen quality, using daily illumination 10~12 hours the best effect.
      目前,小型兔場一般采用自然光照,兔舍門窗的采光面積應占地面的15%左右,但要避免太陽光的直接照射;大中型兔場,尤其是集約化兔場多采用人工光照或人工補充光照,光源以白熾燈光較好,每地面3~4瓦,燈高一般離地面2~2.5米。

    At present, small rabbit farm general use of natural light, about the rabbit house doors and windows of the daylighting area should be accounted for 15% of the ground, but to avoid the direct irradiation of sun light; large and medium-sized farm, especially intensive rabbit farm use artificial light or artificial light supplement, light to incandescent light is good, per square meter of ground 3~4 watts, general 2~2.5 meters high from the ground lamp.
    主站蜘蛛池模板: 国产精品久久久天天影视香蕉| 国产美女被遭强高潮网站不再 | 中文一国产一无码一日韩| 亚洲AV无码精品色午夜在线观看| 尹人香蕉久久99天天拍| 亚洲 中文字幕 日韩 无码| 四虎影视 国产精品| 欧洲freexxxx性少妇播放| 一区二区三区四区在线 | 网站| 国产亚洲视频在线播放香蕉 | 成人无号精品一区二区三区| 久久亚洲精品日韩高清| 人妻蜜臀久久av不卡| 国产成人AV无码精品无毒| 国产免费AV片在线看| 亚洲国产制服丝袜先锋| 国产精品一级在线播放| 国产一本一道久久香蕉| 麻豆人妻| 天天亚洲综合| 2019国自产拍| 国产精品短视频| 久久精品国产成人| 国产女人喷潮视频免费| 精品av中文字幕在线毛片| 亚洲 制服 丝袜 无码| 亚洲人成网站在线观看播放不卡| 拔萝卜高清在线视频观看| 亚欧精品视频在线观看免费| 又粗又大又爽又舒服日产| 野花视频免费观看完整版| 最新无码国产在线播放| 亚洲日本中文字幕天天更新 | 中文字幕人妻无码一夲道| 亚洲av中文乱码一区二| 国产乱人伦偷精品视频色欲| 色欲色香天天天综合网站免费 | 美女脱个精光露出奶头和尿口 | 西西444www无码大胆| 在线日本看片免费人成视久网| 怡春院久久国语视频免费|