小兔子出生時沒有毛，第四天開始長毛。頭發長得很快。經測定，幼兔全耳毛發發育正常，1月齡，毛發長度可達4.2 cm;細毛長度可達2.8厘米，乳毛已全部形成;在60天時，粗毛達到7.5厘米，細毛達到4.5厘米。90日齡時，毛發纖維生長速度與成年家兔相同，日、夜毛發平均生長速度為0.6-0.7 mm。剪掉毛后，大約需要75到90天的時間才能使被毛長回更佳長度。因此，長毛兔一年可以剪4-5次。實驗表明，毛兔每單位體重產毛量是綿羊的2 - 3倍，所需營養是綿羊的1/3。
The little rabbit was born without hair and began to grow on the fourth day. Hair grows fast. The hair development of the whole ear of the young rabbit was normal. At the age of one month, the length of the hair was up to 4.2 cm; the length of the fine hair was up to 2.8 cm, and the milk hair was all formed; at 60 days, the coarse hair was up to 7.5 cm, and the fine hair was up to 4.5 cm. At the age of 90 days, the growth rate of hair fiber was the same as that of adult rabbits, and the average growth rate of day and night hair was 0.6-0.7 mm. It takes about 75 to 90 days for the coat to grow back to its optimum length after shearing. Therefore, the hairy rabbit can be cut 4-5 times a year. The experiment shows that the wool yield per unit weight of wool rabbit is 2 - 3 times that of sheep, and the nutrition requirement is 1 / 3 of that of sheep.
兔毛的生長受到許多因素的制約
The growth of rabbit hair is restricted by many factors
一是品種的影響，兔毛的產量和質量隨品種或品種的不同而不同。
One is the influence of variety. The output and quality of rabbit hair vary with variety or variety.
第二，受個體影響，體重與毛發的產生是成比例的，個體越大，身體越大，表皮面積越大，毛發的產生越高。
Secondly, affected by individuals, the weight is proportional to the production of hair. The larger the individual, the larger the body, the larger the skin area, and the higher the production of hair.
第三，受性別影響，母兔的毛發量高于公兔。母兔在妊娠期和哺乳期毛發生長緩慢。
Thirdly, influenced by gender, the hair quantity of female rabbit is higher than that of male rabbit. The hair growth of female rabbits was slow during pregnancy and lactation.
四是受年齡影響。幼兔毛發少，質量差。頭發在2-3歲時更多。3年后品質更好，毛產量逐漸下降，品質也下降。毛發的生長規律是，從幼兔到成年兔，兔毛由細到厚;老兔子的毛比小兔子的毛短。
Fourth, affected by age. Young rabbits have less hair and poor quality. The hair is most at the age of 2-3. Three years later, the quality was the best, the gross output decreased gradually, and the quality also decreased. The growth rule of hair is that from young rabbit to adult rabbit, the hair of rabbit is from thin to thick; the hair of old rabbit is shorter than that of small rabbit.
五是受生理條件和生理因素的影響。身體虛弱或疾病會抑制兔毛的生長;兔毛的生長是由神經系統控制的。性腺和垂體的內分泌活動直接影響兔毛的產量和質量。例如，去勢的雄兔兔毛生長快，密而細，產量高。
Fifth, it is affected by physiological conditions and factors. Weakness or disease can inhibit the growth of rabbit hair, which is controlled by the nervous system. The endocrine activities of gonad and hypophysis directly affect the output and quality of rabbit hair. For example, the hair of castrated male rabbit grows fast, dense and fine, and its output is high.
此外，化學因素也會影響毛發的生長量，紫外線照射可加速兔毛的生長，但毛發纖維變粗。
In addition, chemical factors can also affect the growth of hair. Ultraviolet irradiation can accelerate the growth of rabbit hair, but the hair fiber becomes thick.
The above is a detailed introduction of the influence factors of Mengyin long hair rabbit on rabbit hair production. Welcome to the official website http://www.uying888.com
發布日期：2020-01-14
來源：http://www.uying888.com 發布人：admin
