长毛兔仔兔出生时无毛，从第四天开始长毛，毛生长得非常迅速。据测定，发育正常的全耳毛幼兔，出生1个月龄时，粗毛长度达4.2厘米；细毛长度达2.8厘米，乳毛已全部形成；60日龄时，粗毛长度达7.5厘米，细毛长度达4.5厘米；90日龄时，毛纤维的生长速度与成年兔一样，每昼夜细毛的生长速度平均为0. 6-0.7毫米。剪毛后的成年兔，被毛再生长到符合优级品质的长度约需75-90天。因此，长毛兔一年可剪毛4-5次。实验证明，毛用兔的产毛量与绵羊相比，单位体重产毛量比绵羊高2-3倍，而所需的营养却是绵羊的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.

长毛兔兔毛的生长受多种因素制约：

The growth of rabbit hair is restricted by many factors

一是受品种的影响，兔毛的产量和品质因品种或品系不同而不同。

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

二是受个体影响，体重与产毛量成正比，个体愈大，体型愈大，则表皮面积越大，产毛量就越高。

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.
                

三是受性别影响，一般母兔产毛量高于公兔产毛量。母兔在妊娠和哺乳期毛生长慢；

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;

四是受年龄影响。幼兔产毛量低，品质差。2-3岁时产毛量非常高。品质也非常好}3岁以后，产毛量逐渐下降，品质也下降。毛的生长规律是，由幼兔到成年兔，兔毛由细变粗；老年兔毛的长度比青年兔短。

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.

五是受身体状况和生理因素影响。体质衰弱或患病会抑 制兔毛生长；兔毛的生长受神经系统的支配，性腺、垂体等内分泌活动可直接影响到兔毛的产量和质量。比如，去势后的公兔兔毛长得快，密细，产量高。

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，化学因素也能影响产毛量，照射紫外线可以加速兔毛生长，但毛纤维变粗。

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.