TY - JOUR
T1 - Effect of increasing doses of neem (Azadirachta indica) seed oil on feed intake, nutrients digestibility, ruminal fermentation and nitrogen utilization of Omani sheep
AU - El-Zaiat, Hani M.
AU - Alqaisi, Othman
AU - Sallam, Sobhy M.
AU - Al-Marzooqi, Waleed S.
N1 - Publisher Copyright:
© 2021 Taylor & Francis Group, LLC.
PY - 2022/5/3
Y1 - 2022/5/3
N2 - This study was conducted to examine the effects of neem (
Azadirachta indica) seed oil (NSO) on feed intake, ruminal fermentability, feed digestibility, nitrogen balance, and blood parameters in Omani sheep. Nine Omani male sheep (BW; 54.44 ± 8 kg/sheep) were used in a replicated 3 × 3 Latin Square design with three dietary treatments and three periods, with each period lasting 21 days. The animals were randomly assigned into three treatment groups: basal diet without NSO (control); 20 mL/sheep per day NSO (low dose) or 40 mL/sheep per day NSO (high dose). Sheep fed with high dose presented lower (
p < 0.05) intake, fiber digestibility, and excreted N in urine. However, diet supplemented with high NSO dose had a lower (
p < 0.05) ruminal acetate proportion, while increased (
p < 0.05) ruminal propionate compared to the control group. Moreover, sheep offered with NSO showed a linear decrease (
p = 0.052) in ruminal ammonia nitrogen (NH
3-N) concentration. The high dose increased (
p < 0.05) blood glucose and cholesterol, while decreased urea nitrogen concentrations. Emission of predicted methane (CH
4) reduced (
p = 0.007) by 13% for high dose compared to the control group. In conclusion, these results suggested that NSO is a potential feed additive with up to 20 ml/kg of DM alters rumen fermentation profile, decreased CH
4 production, feed digestibility, and nitrogen metabolism for sheep.
AB - This study was conducted to examine the effects of neem (
Azadirachta indica) seed oil (NSO) on feed intake, ruminal fermentability, feed digestibility, nitrogen balance, and blood parameters in Omani sheep. Nine Omani male sheep (BW; 54.44 ± 8 kg/sheep) were used in a replicated 3 × 3 Latin Square design with three dietary treatments and three periods, with each period lasting 21 days. The animals were randomly assigned into three treatment groups: basal diet without NSO (control); 20 mL/sheep per day NSO (low dose) or 40 mL/sheep per day NSO (high dose). Sheep fed with high dose presented lower (
p < 0.05) intake, fiber digestibility, and excreted N in urine. However, diet supplemented with high NSO dose had a lower (
p < 0.05) ruminal acetate proportion, while increased (
p < 0.05) ruminal propionate compared to the control group. Moreover, sheep offered with NSO showed a linear decrease (
p = 0.052) in ruminal ammonia nitrogen (NH
3-N) concentration. The high dose increased (
p < 0.05) blood glucose and cholesterol, while decreased urea nitrogen concentrations. Emission of predicted methane (CH
4) reduced (
p = 0.007) by 13% for high dose compared to the control group. In conclusion, these results suggested that NSO is a potential feed additive with up to 20 ml/kg of DM alters rumen fermentation profile, decreased CH
4 production, feed digestibility, and nitrogen metabolism for sheep.
KW - Neem seed oil
KW - Omani sheep
KW - feed digestibility
KW - nitrogen balance
KW - rumen fermentation
KW - Eating
KW - Diet/veterinary
KW - Azadirachta/metabolism
KW - Male
KW - Rumen
KW - Digestion
KW - Fermentation
KW - Animal Feed/analysis
KW - Animals
KW - Plant Oils/metabolism
KW - Sheep
KW - Dietary Supplements
KW - Nitrogen/metabolism
UR - http://www.scopus.com/inward/record.url?scp=85105390283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85105390283&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/41f45647-fadf-30ea-a00d-f2ce2863025f/
U2 - 10.1080/10495398.2021.1917422
DO - 10.1080/10495398.2021.1917422
M3 - Article
C2 - 33941033
AN - SCOPUS:85105390283
SN - 1049-5398
VL - 33
SP - 1553
EP - 1561
JO - Animal Biotechnology
JF - Animal Biotechnology
IS - 7
ER -