الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
- This stUdy was carried out over one full year
(JUly, 1980 to June 1981) utilizing two farms of
sheep. ~arms were an experimental one of 146 Barki
ewes raised on Maryout Experimental Station and a
commercial one of 148 ewes of the same breed kept at
the Nile Agricultural company Limited (HADeD) in a newly
reclaimed area west of Noubaria. The distance between
both localities is about 45 km.
Estimates of feed consumed and lambs produced were
recorded. The main results could be summarized as
follows:-
1) Average livebody weight of ewes of the experimental
and commercial farms were 35.1 and 39.5 kg. at the
start of the breeding season, respectively. Weight
gains over the 51 day~mating period were 6.7 and 0.2
kg. for ewes of the experimental and commercial farms t
respectively. Corresponding weight gains from mating
to just before lambing were 8.0 and 2.7 kg, respectively.
2) Averages of conception rate were 82.2 and 61.4% for
the experimental and commercial farms , respectively,
with corresponding 1ambing rates of 81 .:’and 66.S%,
respect! vely.
) Number of lambs. weaned as percentages of ewes joined
were 71.2) and 61.49% for the experimental and Commercial
farms , respectively.
4) The overall mean of birth weight of lambs was ).42
kg· with no significant difference between-both farms.
5) The overall mean of weaning weight of lambs at 4
month of age was 19.91.kg. with a significant difference
(P ~ 0.01) of 3.)6 kg. between both farms,
in favour of the experimental one.
6) Daily gain of lambs were 150, 142 gm, from birth to
weaning, 67, 63 gm, from weaning to 6 months of age
and 123, 103 gm. from birth to 6 months of age, in
the experimental and commercial farms , respectively.
Differences in growth rate of lambs between
experimental and commercial farms_- were significant
(p <.O.01) apart from than 4 to 6 months of age.
7) Weights of lambs at 6 month of age were 25.55 and 21.95
kg. for the experimental and commercial farms” respectively,
and that the difference was significant
(P <. 0.01).
8) Average of feed intake per ewe was 394.83 and 357.46
kg. DM for the experimental and commercial farms f respectively,
over the experimental period (12 months).
9) In the experimental farm. 22.7 kg DM. was needed to
produce 1 kg of lambs. The corresponding value for
the commercial one was 27.0 kg.
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10- In the experimental farm 47.08 or 24.86 kg
DM ~ TON respectively were needed to produce
one kg. carcass. Corre sponding values for the
Commercial one were 55.99 or 19.36 kg.
Results were discUSsed and recQmmendat10DS to
improve ’BlIlP’ tor local Barki sheep were put forward.
On the average, each unit (ewe + lamb) consumed
449.60 and 402.96 kg. dry matter for the exper~ental
and Commercial farms respectively, out of which 394.83
and 357.46 kg. for the ewe and 54.87 and 45.50 kg. for
the lamb, respectively.