久久青草国产免费频观,青青草视频原手机在线观看,av在线色,国产精品一区二区在线观看完整版,免费观看成人稀缺视频在线播放,香蕉网站在线,日本免费人成视频播放,国产精品一区在线蜜臀

        安哥拉兔習性和特點要注意什么?

        發布日期:2021-09-11 來源:http://m.parmwkd.cn 發布人:admin

        兔的品種類型很多,但長毛兔只是一個較典型品種,即安哥拉兔。現在各國飼養的長毛免,都是引用安哥拉兔,但在不同的自然氣候和飼養條件下,采用不同的繁殖和選育方法,培育形成了許多品系。德系安哥拉兔該免產于德國,是目前世界上飼養更普遍、產毛量的一個品系。我國自1978年開始引進飼養。
        There are many types of rabbits, but long haired rabbit is only a typical variety, namely Angora rabbit. At present, Angora rabbits are used in all countries, but many strains have been formed by using different breeding and breeding methods under different natural climate and feeding conditions. German Angora rabbit is produced in Germany. It is the most common breed and the highest wool yield in the world. China has introduced breeding since 1978.
        安哥拉兔習性和特點
        Habits and characteristics of Angora rabbit
        外貌特征全身披厚密絨毛。被毛有毛叢結構,不易纏結,有明顯波浪形彎曲。面部絨毛不甚一致,有的無長毛,亦有額毛、頰毛豐盛的,但大部分耳背均無長毛,僅耳尖有一撮長毛,俗稱“一撮毛”。四肢、腹部密生絨毛;體毛細長柔軟,排列整齊。四肢強健,胸部和背部發育良好,背線平直,頭型偏尖削。
        Appearance features: the whole body is covered with thick and dense fluff. The coat has hair clump structure, is not easy to tangle, and has obvious wavy bending. Facial villi are not very consistent. Some have no long hair, and some have abundant forehead hair and cheek hair. However, most of the ear backs have no long hair, only a pinch of long hair on the ear tip, commonly known as & ldquo; A pinch of hair & rdquo;. The limbs and abdomen are densely covered with villi; The body hair is slender, soft and arranged neatly. Strong limbs, well developed chest and back, straight back line and sharp head.
        蒙陰長毛兔
        生產性能
        production performance 
        德系兔體型較大,成年體重3.5~5.2千 克,高的可達5.7千克,體長45~50厘米,胸圍30~35厘米。年產毛量公兔為1190克,母兔為1406克,可達1700~2000克;被毛密度為每平方厘米16000~18000根,粗毛含量 5.4%~6.1%,細毛細度12.9~13.2微米,毛長5.5~5.9厘 米。年繁殖3~4胎,每胎產仔6~7只,可達11~12只; 平均奶頭4對,多的5對;配種受胎率為53.6%。
        German rabbits are large, with an adult weight of 3.5 ~ 5.2kg, a height of 5.7kg, a body length of 45 ~ 50cm and a chest circumference of 30 ~ 35cm. The annual gross output of male rabbits is 1190g and that of female rabbits is 1406g, up to 1700 ~ 2000g; The hair density is 16000 ~ 18000 per square centimeter, the content of coarse hair is 5.4% ~ 6.1%, the fineness of fine hair is 12.9 ~ 13.2 microns, and the hair length is 5.5 ~ 5.9 cm. It breeds 3 ~ 4 babies a year, giving birth to 6 ~ 7 babies per fetus, up to 11 ~ 12; The average number of nipples was 4 pairs, and the number of nipples was 5 pairs; The conception rate of mating was 53.6%.
        主要優缺點
        Main advantages and disadvantages
        德系兔的主要優點是產毛量高,被毛密度大,細長柔軟,有毛叢結構,排列整齊,不易纏結。主要缺點是繁殖性能較低,配種比較困難,初產母兔母性較差,少數有食仔惡癖等。適應性較差,公兔有夏季不育現象。
        The main advantages of German rabbits are high wool production, high hair density, slender and soft, with hair cluster structure, orderly arrangement and not easy to tangle. The main disadvantages are low reproductive performance, difficult breeding, poor motherhood of primiparous female rabbits, a few vices of feeding young rabbits, etc. The adaptability is poor, and male rabbits have infertility in summer.
        主站蜘蛛池模板: 平乐县| 一区二区三区四区四色av| 国产精品无码久久久久久久久久| 久热香蕉精品视频在线播放| 久久精品国产成人av| 青青草免费观看高清视频| 亚洲电影一区二区| 免费国人成人自拍视频| 国产 无码 日韩| 国产精品一区二区国产| 美欧日韩一区二区三区视频| 2021精品亚洲中文字幕| 国产成人综合久久亚洲精品| 免费一级黄色大片久久久| 亚洲成在人网站AV天堂| 久久久午夜毛片免费| 高唐县| 精品人妻中文字幕一区二区三区| 国产亚洲日韩AV在线播放不卡| 久久亚洲中文字幕视频| 中国浓毛少妇毛茸茸| 香港一级毛片免费看| 天天摸天天做天天爽| 粉嫩小泬无遮挡久久久久久| 91精品一区二区蜜桃| 久久久久久中文字幕有精品| 亚洲乱理伦片在线观看中字| 成年女人喷潮免费视频| A级毛片高清免费视频播放出要看| 无码一区二区三区网站| 亚洲免费成年女性毛视频| 日韩人妻中文字幕一区二区| 韩国日本三级在线观看| 午夜神器18以下不能进| 中文字幕乱码中文乱码毛片| 91精品亚洲一区二区三区| 久久99精品久久久66| 亚洲日韩一区精品射精| 无码人妻丰满熟妇区五十路在线| 中文字幕乱码人妻无码久久久1| 99视频精品羞羞色院|