Abstract
This study was conducted to evaluate the Effect of time of using feedblocks (FB) as supplementary feed on the weight changes and reproductiveperformance of Awassi yearling ewes depend on crop residues as basal diet. .Sixty Awassi yearling ewes (mean live weight 39.51 kg) aged 12-13 monthswere allocated into four groups according to their live weight. First group (T1)fed conventional diet (barley grains + straw). The second group (T2) fedconventional diet plus FB during pre and post mating. The third group (T3) fedconventional diet plus FB during pre and mating. The fourth group (T4) fedconventional diet plus FB during post mating. The results of this experimentshowed that using FB as supplementary feed reduced the weight losses ofAwassi yearling ewes. FB supplementation improved conception rate of Awassiyearling ewes as compared with control group (T1). The T2 group had thehighest conception rate (86.66%) followed by T3 and T4 (73.33%) and thelowest group T1 (66.66%). Using FB during pre mating (T2, T3) reducedmating season of Awassi yearling ewes were 70-82% of these lambed from 1stcycle. Lambing percentage increased considerably due to FB supplementation.The lambing percentages were 100, 87, 80 and 73% for groups T2, T3, T4 andT1 respectively.
Highlights
This study was conducted to evaluate the Effect of time of using feed blocks
reproductive performance of Awassi yearling ewes depend on crop residues as basal diet
aged 12-13 months were allocated into four groups according to
Summary
عالية جداُ .)8 أظتترت نتتا الد ارفتة الحاليتة أن افتتخدام البم كتات العم يتة كعمت تكميمت أدت إلتى الترميتل متن فرتدان أ ازن الح ليتات الع افتية التت تعتمتد فت تغتريتتا عمتى مخم تات الحصتاد لمحبت ب كعمت أفتاس هترا تت ق م الد ارفات الفابرة )21 21 0حيث جد أن افتخدام البم كات العم ية كعم تكميم ف تغرية
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