Bulgarian Journal of Agricultural Science
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Impact of partial and total replacement of urea nitrogen instead of soybean meal protein on reproductive performance of Awassi lambs
Safwan L. Shihaborcid
Abstract: In female increase urea intake may affect negatively in fertility as a result of the change in oviduct acidity this effect of urea noticed also in male semen quality. We expect that inclusion urea instead of soya protein may not affect in semen qualities in male duo to high starch ratio in the ration. The study aimed to find out the effect of partial or total replacement urea as a substitute for soybean meal on the reproductive performance of Awassi male sheep. In this study, 15 Awassi lambs were used with an average initial weight of 60.30 kg, aged 11-13 months. Lambs were randomly divided according to their weight into three groups. The first group (T1) animals were fed a ration containing soybean meal, the second group (T2) 50% of soybean meal was replaced by urea, and the third group (T3) urea was totally replaced with soybean meal. The results showed a feed intake decrease consumed 1.14 kg, in the second treatment compared with the first and third treatments (1.34, 1.34 kg). The average daily and total weight gain 0.116 and 7.00 kg, decreased significantly (P<0.05) in total replacement of urea compared with partial replacement of urea and control treatment 0.191 and 11.50 kg and 0.174 and 10.50 kg, respectively. Partial replacement urea for soybean meal led to a significant decrease (P<0.05) in semen characteristics compared with T1 and T2. On the other hand, partial urea replacement led to a significant (P<0.05) increase in the concentration of blood plasma cholesterol 172.48 mg/dl, compared to the second and third treatments, 134.28 and 137.14 mg/dl, respectively. with feeding starch diets inclusion urea Partially are totally instead of soybean meal has determine effect in semen quality.
Keywords: partial and total urea nitrogen; ram; semen parameters; soybean meal
Citation: Shihab, S. L. (2024). Impact of partial and total replacement of urea nitrogen instead of soybean meal protein on reproductive performance of Awassi lambs. Bulg. J. Agric. Sci., 30(2), 341–345
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Date published: 2024-04-26
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