Tropical Animal Health and Production

, Volume 41, Issue 4, pp 599–606 | Cite as

Feed intake, digestibility, body weight and carcass parameters of Afar rams fed tef (Eragrostis tef) straw supplemented with graded levels of concentrate mix

Original Paper


The experiment was conducted at Alamata Agricultural Research Center, Ethiopia using 20 Afar rams with an initial body weight (BW) of 18.2 ± 1.76 (mean ± SD) kg. The objectives were to study the effect of supplementation with concentrate mix consisting of wheat bran (WB), noug seed cake (NSC) and sesame seed cake (SSC) at the ratio of 2:1:1 on dry matter (DM) basis, respectively on feed intake, digestibility, BW gain and carcass parameters of Afar rams fed tef (Eragrostis tef) straw basal diet. The experiment was arranged with four treatments and five replications in a randomized complete block design. The treatments included feeding sole tef straw (T1, control), and daily supplementation with the concentrate mix offered at 150 (T2, low), 250 (T3, medium) and 350 (T4, high) g DM per head. Total DM intake, crude protein (CP) digestibility, daily BW gain (P < 0.001), DM and organic matter (OM) digestibility, and carcass parameters (P < 0.05) were higher in the supplemented than in the control treatment. Intake of tef straw reduced as the level of supplementation increased, whereas the contrary was true for CP intake. Performance in carcass parameters was better for the medium compared to the low level of concentrate mix supplementation. Moreover, the medium level of supplementation did not substitute tef straw intake. Therefore, it is concluded that the medium level of concentrate mix supplement maintained the utilization of the roughage feed and resulted in better carcass parameters.


Afar rams Body weight Carcass Concentrate mix Digestibility Feed intake Tef straw 



acid detergent fiber


acid detergent lignin


body weight


crude protein


dry matter


neutral detergent fiber


noug seed cake


organic matter


sesame seed cake


wheat bran


  1. AOAC, 1990. Official Methods of Analysis 15th ed. Association of Official Analytic Chemists. AOAC. (Arlington, USA).Google Scholar
  2. Ash, A.J. and Norton, W.B., 1987. Studies with the Australian Cashmere goat. II. Growth and digestion in male and female goats given pelleted diets varying in protein content and energy level. Australian Journal of Agricultural Research, 38, 957–969. doi:10.1071/AR9870957. CrossRefGoogle Scholar
  3. Bicer, O., Guney, O. and Pekel, E., 1995. Effect of slaughter weight on carcass characteristics of Awassi male lambs. Journal of Applied Animal Research, 8, 85–90.Google Scholar
  4. Bishaw, F., Melaku, S., 2008. Effects of supplementation of Farta sheep fed hay with sole or mixtures of noug seed meal and wheat bran on feed intake, digestibility and body weight change. Tropical Animal Health and Production, doi:10.1007/s11250-008-9138-1, In press.
  5. Bogale, S., Melaku, S. and Yami, A., 2008. Potential use of crop residues as livestock feed resources under conditions of smallholder farmers in the Bale highlands of Ethiopia. Tropical and Subtropical Agroecosystems, 8, 107–114.Google Scholar
  6. Bonsi, M.L.K., Tuah, A.K., Osuji, P.O., Nsahlai, V.I. and Umunna, N.N., 1996. The effect of protein supplement sources or supply pattern on the intake, digestibility, rumen kinetics, nitrogen utilization and growth of Ethiopian Menze sheep fed tef straw. Animal Feed Science and Technology, 64, 11–25. doi:10.1016/S0377-8401(96)01048-6 CrossRefGoogle Scholar
  7. Butterworth, M.H. and Mosi, A.K., 1985. The voluntary intake and digestibility of oat straw and maize stover by sheep supplemented with different levels of noug (Guizotia abyssinica) meal. Animal Feed Science and Technology, 24, 14–17.Google Scholar
  8. Degu, A., Melaku, S., Berhane, G., 2008. Supplementation of isonitrogenous oil seed cakes in cactus (Opuntia ficus-indica)-tef straw (Eragrostis tef) based feeding of Tigray Highland sheep. Animal Feed Science and Technology, doi:10.1016/j.anifeedsci.2008.03.014, In press.
  9. Galal, E.S.E., Kassahun A., Beyene K., Yohannes G. and O’Donovan, P.B., 1979a. A study of fattening Ethiopian sheep: 1. Performance of highland lambs under feedlot conditions. Ethiopian Journal of Agricultural Science, 1, 93–98.Google Scholar
  10. Galal, E.S.E., Afeworke T. and Kassahun A., 1979b. A study on fattening Ethiopian sheep: 2: Performance of Adal lambs on supplemented grazing. Ethiopian Journal of Agricultural Science, 1, 99–107.Google Scholar
  11. Ibrahim, M.N.M., Tamminga, S. and Zemmelink, G., 1995. Degradation of tropical roughages and concentrate feeds in the rumen. Animal Feed Science and Technology, 54, 81–92. doi:10.1016/0377-8401(94)00758-2 CrossRefGoogle Scholar
  12. Kaitho, R.J., Umunna, N.N., Nsahlai, I.V., Tamminga, S. and Van Bruchem, J., 1998. Effect of feeding graded levels of Leucaena leucocephala, Leucaena pallida, Sesbania sesban and Chamaecytisus palmensis supplements to tef straw given to Ethiopian highland sheep. Animal Feed Science and Technology, 72, 355–366. doi:10.1016/S0377-8401(97)00159-4 CrossRefGoogle Scholar
  13. Kemp, J.D., Johnson, A.E., Stewart, D.F., Ely, D.G. and Fox, J.D., 1976. Effect of dietary protein, slaughter weight and sex on carcass composition. Journal of Animal Science, 42, 575–580.Google Scholar
  14. Macit, M., Esenbuga N. and Karaoglu, M., 2002. Growth performance and carcass characteristics of Awassi, Morkaraman and Tushin lambs grazed on pasture and supplemented with concentrate. Small Ruminant Research, 44, 241–246. doi:10.1016/S0921-4488(02)00077-9 CrossRefGoogle Scholar
  15. McDonald, P., Edwards, R.A., Greenhalgh, J.F.D. and Morgan, C.A., 2002. Animal Nutrition. 6th ed., (Prentice Hall. USA).Google Scholar
  16. Melaku, S., Peters, K.J. and Tegegne, A., 2004. Effects of supplementation with foliages of selected multipurpose trees, their mixtures or wheat bran on feed intake, plasma enzyme activities, live weight and scrotal circumference gains of Menz sheep. Livestock Production Science, 89, 253–264. doi:10.1016/j.livprodsci.2004.01.003.CrossRefGoogle Scholar
  17. Nega, A., and Melaku, S., 2008. Effects of rice bran and/or noug seed (Guizotia abyssinica) meal supplementation on feed intake, digestibility and body weight change of Farta sheep. Tropical Animal Health and Production, doi:10.1007/s11250-008-9215-5, In press.
  18. Ngwa, A.T. and Tawah, C.L., 2002. Effect of supplementation with leguminous crop residues or concentrates on the voluntary intake and performance of Kirdi sheep. Tropical Animal Health and Production, 34, 65–73 doi:10.1023/A:1013789929102.PubMedCrossRefGoogle Scholar
  19. Ponnampalam, E.N., Dixon, R.M., Hosking, B.J. and Egan, A.R., 2004. Intake, growth and carcass characteristics of lambs consuming low digestibility hay and cereal grains. Animal Feed Science and Technology, 114, 31–41. doi:10.1016/j.anifeedsci.2003.12.005 CrossRefGoogle Scholar
  20. Preston, R.T. and Leng, R.A., 1984. Supplementation of diets based on fibrous resides and by-products. pp. 373–409. In: F., Sundstøl, E., Own (eds.). Straw and Other Fibrous By- products as Feed. (Development in Animal and Veterinary Sciences, 14. Elsevier, Amesterdam, The Netherlands).Google Scholar
  21. Ranjhan, S.K., 1997. Animal Nutrition in the Tropics. 4th ed., (Vikas Publishing House, Intanagar, India).Google Scholar
  22. SAS, 1998. Version 8. Statistical Analysis System Institute Inc., (NC., USA).Google Scholar
  23. Van Soest, P.J., 1994. Nutritional Ecology of Ruminants. 2nd ed., (Cornell University Press, Ithaca, New York, USA).Google Scholar
  24. Van Soest, P.J. and Robertson, J.B., 1985. Analysis of forage and fibrous foods. A laboratory manual for Animal Science 613, (Cornell University Press, Ithaca, New York, USA).Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Alamata Agricultural Research CenterAlamataEthiopia
  2. 2.Department of Animal SciencesHaramaya UniversityDire-DawaEthiopia

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