Abstract :

T

he study aimed to investigate the effect of using different dietary levels of Moringa oleifera by- product (petiole leaves) as a partial substituent (0, 25, 37.5 and 50%) for clover straw.  Results indicated that the chemical composition of moringaby-product contained high protein, dry matter (DM), organic matter (OM), Ash and non-structure carbohydrate (NSC) and lowest contents other values compared to clover straw, values were recorded with  nitrogen free extract (NFE) and crude fiber (CF). The effect of rations containing different dietary levels of moringaby-product on growth performance, digestibility coefficient of nutrient, nutritive value, cecum activity, carcass characteristics, quality meat and some blood plasma constituents of growing New-Zealand white rabbits were studies. The chemical composition of these rations has nearly similar crude protein (CP), ether extract (EE), crude fiber (CF) and digestible energy. Growth performance of the experimental groups could be noticed that the carcass weight and total edible parts increased (P<0.05) with replacing moringaby- product meal  instead clover straw at level 25%, 37.5% and 50% compared to the control ration, the values of carcass weight were 940.92, 966.83 and 1024.33gm, the total edible parts were 52.22, 51.83 and 53.44 gm,  respectively .The best results were recorded with R₄ containing  moringa by- product meal 50%, the significantly improved up to  rate 5.25%. This observation may reflect the relatively higher feed intake by rabbits on the moringaby- product meal diets resulting in higher daily weight gain. The values of ash and EE were insignificant effect in meat. The values of moisture, dry matter and crude protein were significant between values, the best results crude protein and dry matter meat recorded with R₂ compared with control (R₁). The total period from 6-13 weeks observed the total feed conversion ratio values significant increase between rations and the best feed conversion ratio recorded with R₄ (3.38g/feed /gain). The result indicted to the best ration with substituent moringa by- product meal by 50% instead clover straw. The results of digestibility coefficient were significant differences among three tested rations compared with control for indicated that adding moringa by-product meal at 25, 37.5 and 50% significantly improved (P<0.05) digestibility coefficient, while the best improved significant values were recorded with 50% (R₄) containing moringa by- product followed by R₃ more than other R₂ and control (R₁). In rabbit diet R₄ recorded the best results cell-wall constituent digestibility data and the highest nutrient digestibility. The highest content moringa by- product meal (50%) showed the highest TDN (67.41%) and DCP (12.27%) and significant increased caecum weight, caecum length, caecum pH and total volatile fatty acids (TVFA^,s) caeca juice. There was insignificant trend towards a reduction in the cholesterol of level moringa R₄ by 3.13% compared with control (R₁). This reduction in serum may be suggest a general decline in lipid mobilization. It may be suggested that, moringa leaf meal diets can reduce serum cholesterol, hence assisting in the reduction and deposition of cholesterol in the muscles. The economic efficiency of R₄ was higher by 11.31 %, total revenue increased by 4.45%, net revenue by 10.35%, feeding cost was 1% slightly lower compared with control rations. No mortality of rabbits was recorded during the study.

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Research :