Effect of Varying Levels of Zizyphus (Zizyphus mauritiana) Leaf Meal Inclusion in Concentrate Diet on Performance of Growing Yankasa Ram Lambs Fed Maize Stover Basal Diet
الموضوعات :S.B. Abdu 1 , O.W. Ehoche 2 , A.M. Adamu 3 , G.S. Bawa 4 , M.R. Hassan 5 , S.M. Yashim 6 , H.Y. Adamu 7
1 - Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
2 - National Animal Production Research Institute Shika, Zaria, Nigeria
3 - National Animal Production Research Institute Shika, Zaria, Nigeria
4 - Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
5 - Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
6 - Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
7 - Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
الکلمات المفتاحية: growth, Sheep, live weight, intake, <i>Zizyphus mauritiana</i>,
ملخص المقالة :
This study investigated the effects of the dietary supplementation of Zizyphus mauritianaleaf meal (ZLM) on the performance of Yankasa lambs. Twenty five lambs aged between 6 and 8 months were randomly divided into five groups of five animals each in a completely randomized design to receive supplementary diets containing 0, 10, 20, 30 and 40% ZLM as replacement for cotton seed cake in concentrate supplement to a maize stover basal dietfor a period of 120 days. Inclusion of ZLM in the supplement did not significantly (P>0.05) affect nutrient intake. There was a significant (P<0.05) depression on dry matter (DM), organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) digestibility, with 30 and or 40% increases in the level ofZLM inclusion in the supplementary diet. Feeding ZLM containing diets particularly at 30 and 40% levels significantly (P<0.05) influenced nitrogen utilization. Fecal nitrogen excretion significantly (P<0.05) increased with ZLM supplementation. Control (0%) and 10% level of inclusion had similar and significantly (P<0.05) lower fecal N loss (14.30 and 14.94 g/d), followed by 20% (15.42 g/d), with T4 and T5 having significantly (P<0.05) higher fecal N loss (22.04and 22.89 g/d). Urinary N loss was significantly higher (P<0.05) in lambs offered 0, 10 and 20% ZLM (10.88, 11.98 and 11.02, respectively)diets compared to 30% (10.06) and 40% (9.89) receiving higher levels of ZLM, which were significantly (P<0.05) lower. Nitrogen retention was highest in control (26.19), followedby 10 and 20% ZLM (24.42 and 24.14), which were similar and higher than 30 and 40% supplementations (17.15 and 15.97, respectively). Nitrogen retention as % of intake was highest (50.98%) in animals fed 0% and was least in 40% ZLM supplementation (32.75%). It was concluded that inclusion of ZLM in concentrate diet at 10-20% inclusion levels gave best result in terms of performance than when the leaf meal is included at higher levels to ram lambs.
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