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長(zhǎng)毛兔仔兔出生時(shí)無(wú)毛，從第四天開(kāi)始長(zhǎng)毛，毛生長(zhǎng)得非常迅速。據(jù)測(cè)定，發(fā)育正常的全耳毛幼兔，出生1個(gè)月齡時(shí)，粗毛長(zhǎng)度達(dá)4.2厘米；細(xì)毛長(zhǎng)度達(dá)2.8厘米，乳毛已全部形成；60日齡時(shí)，粗毛長(zhǎng)度達(dá)7.5厘米，細(xì)毛長(zhǎng)度達(dá)4.5厘米；90日齡時(shí)，毛纖維的生長(zhǎng)速度與成年兔一樣，每晝夜細(xì)毛的生長(zhǎng)速度平均為0. 6-0.7毫米。剪毛后的成年兔，被毛再生長(zhǎng)到符合優(yōu)級(jí)品質(zhì)的長(zhǎng)度約需75-90天。因此，長(zhǎng)毛兔一年可剪毛4-5次。實(shí)驗(yàn)證明，毛用兔的產(chǎn)毛量與綿羊相比，單位體重產(chǎn)毛量比綿羊高2-3倍，而所需的營(yíng)養(yǎng)卻是綿羊的1/3。

Angora rabbits are hairless when they are born. They grow hair from the fourth day. The hair grows very quickly. According to the measurement, the normal development of the whole ear hair rabbit, born 1 month old, coarse hair length of 4.2 cm; fine hair length of 2.8 cm, milk hair has been formed; 60 days old, coarse hair length of 7.5 cm, fine hair length of 4.5 cm; 90 days old, hair fiber growth speed and adult rabbit, fine hair growth speed is 0.6-0.7 mm per day and night. After shearing, it takes about 75-90 days for the hair of adult rabbit to grow to the superior quality. Therefore, Angora rabbits can be sheared 4-5 times a year. The results showed that the wool yield of wool rabbit was 2-3 times higher than that of sheep, but the nutrition needed was 1 / 3 of sheep.

長(zhǎng)毛兔兔毛的生長(zhǎng)受多種因素制約：

The growth of rabbit hair is restricted by many factors

一是受品種的影響，兔毛的產(chǎn)量和品質(zhì)因品種或品系不同而不同。

One is that the yield and quality of rabbit hair vary with varieties or strains.

二是受個(gè)體影響，體重與產(chǎn)毛量成正比，個(gè)體愈大，體型愈大，則表皮面積越大，產(chǎn)毛量就越高。

Second, affected by individuals, body weight is directly proportional to wool yield. The larger the individual is, the larger the body is, the larger the epidermal area is, and the higher the wool yield is.
                

三是受性別影響，一般母兔產(chǎn)毛量高于公兔產(chǎn)毛量。母兔在妊娠和哺乳期毛生長(zhǎng)慢；

Third, due to the influence of gender, the wool yield of female rabbits is generally higher than that of male rabbits. The hair growth of female rabbits was slow during pregnancy and lactation;

四是受年齡影響。幼兔產(chǎn)毛量低，品質(zhì)差。2-3歲時(shí)產(chǎn)毛量非常高。品質(zhì)也非常好}3歲以后，產(chǎn)毛量逐漸下降，品質(zhì)也下降。毛的生長(zhǎng)規(guī)律是，由幼兔到成年兔，兔毛由細(xì)變粗；老年兔毛的長(zhǎng)度比青年兔短。

Fourth, it is affected by age. Young rabbits have low wool yield and poor quality. The wool yield is very high at the age of 2-3. The quality was also very good} after 3 years old, the wool yield decreased gradually, and the quality also decreased. The growth rule of hair is that from young rabbit to adult rabbit, the hair of rabbit changes from thin to thick; the length of hair of old rabbit is shorter than that of young rabbit.

五是受身體狀況和生理因素影響。體質(zhì)衰弱或患病會(huì)抑 制兔毛生長(zhǎng)；兔毛的生長(zhǎng)受神經(jīng)系統(tǒng)的支配，性腺、垂體等內(nèi)分泌活動(dòng)可直接影響到兔毛的產(chǎn)量和質(zhì)量。比如，去勢(shì)后的公兔兔毛長(zhǎng)得快，密細(xì)，產(chǎn)量高。

Five is affected by physical condition and physiological factors. The growth of rabbit hair is controlled by nervous system, and endocrine activities such as gonad and pituitary gland can directly affect the yield and quality of rabbit hair. For example, the castrated male rabbit hair grows fast, dense and fine, with high yield.

另外，化學(xué)因素也能影響產(chǎn)毛量，照射紫外線可以加速兔毛生長(zhǎng)，但毛纖維變粗。

In addition, chemical factors can also affect the wool yield. Ultraviolet irradiation can accelerate the growth of rabbit hair, but the wool fiber becomes thicker.