دراسة تأثير بعض العوامل غير الوراثية في تساقط صوف الأغنام العواس في البيئات شبه الجافة

الملخص EN

Wool is one of the most important economic secondary products, which has several uses, in addition to covering and warming animals in the harsh winter.

There has been an increase in the fall of wool in sheep herds in recent years, especially dry ones.

The study was conducted on 106 heads of Awassi sheep (during 2017 and 2018) in intensive breeding conditions in the semi-arid areas.

They were suffering from falling wool out.

The animals that suffered from the fall of wool were classified as divided into three degrees, namely, full fall, partial fall, and fleece.

The effect of the mother's age, type of birth, and month of birth was Sudied to determine the factors affecting sheep's wool fall.

The results were Satirically analyzed using the square model using the SAS program .(2008) The results showed that the percentage of wool shedding in the Sudied herd was 73.6% in the ewes, while in the rams and lambs, 16.8%, 16.8% and 32% respectively.

The prevalence rate was about 19.2%.

While the proportion of animals that suffered a complete alopecia was about 25.6%.

The results showed that the month of birth and the birth pattern had a significant effect on the fall of wool.

The fall of wool in sheep with twin births was 83.3%, which was significantly higher (p <0.05) than in single-born sheep (67.2%).

In late sheep deliveries (December and January), the percentage of wool in the late sheep deliveries (79.2%) was significantly higher (p <0.05) than in earlier deliveries (February and March) (67.9%).

While the mother's age at birth did not have a significant effect on wool fall (P> 0.05).

The study concluded that the size of the mother's womb and the month of birth had a significant effect on the fall of wool in Awassi sheep.