أسباب تساقط صوف أغنام العواس في ظروف الإنتاج شبه المكثفة

Abstract EN

Breeders' sheep herds and sheep herds under semi-intensive production conditions suffer the phenomenon of wool shedding.

This phenomenon affects a large number of sheep herds at Deir al- Hajar station of scientific agricultural research.

Therefore, this research was carried out with the aim of investigating the causes of wool falling among the sheep flock at Deir al-Hajar station.

Blood samples were taken from 67 heads of Awassi sheep that had lost wool at the station during November and December in 2019, and the concentrations of copper, iron, zinc, cobalt and calcium in the blood serum was estimated.

Samples were also taken from the concentrated feed used at the station to estimate the chemical compositions of this feed.

Soil samples were collected at the station, samples of salt stones and commercial feed supplements to study their content of the mineral elements copper, iron, cobalt and zinc.

In addition, fecal samples were collected from flocks of sheep, with the aim of investigating the oocytes of internal parasites, and external examination was done to check for external parasites.

The results showed that there is a clear deficiency of the copper elements accompany with acute deficiency of iron in most of the tested sera.

A fewer case has cobalt deficiency.

Also, the results of soil analysis showed that most of trace elements were less than their standard content.

In addition, the results of feed supplements analysis showed much less than the declared content.

The study recommends to add the mineral elements, especially copper, iron, zinc, and cobalt to the diets of ewes and lambs to compensate for the deficiency of them during the winter season.