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The current study was conducted to determine the chemical composition and gas production properties of different nut hulls that were included to almond, peanut and walnut hulls. In this experiment, in a completely randomized design, three different nut hulls, after drying, were ground to pass a 2 mm sieve and used for determination of chemical composition and in vitro gas production. Results showed that there were no differences among treatments for DM and EE level (P>0.05). But, the CP, NDF, ADF, and Ash content in peanut hulls was significantly higher than almond and walnut hulls (P<0.05). Also, the hemicellulose content of almond hulls was higher than peanut and walnut hulls (P<0.05). The volume of gas produced during 96 h for almond hulls was significantly higher than peanut and walnut hulls (P<0.05). Also, the potential gas production (b) of almond hulls was higher than other treatments (P<0.05). But, the constant rate of gas production (c) was same for all treatments (P>0.05). Besides, the OMD, NEl, ME, and SCFA content of almond hulls was significantly higher than peanut and walnut hulls (P<0.05). Overall, it seems that of these agricultural by-products, although all three have high levels of fiber, but the nutritional value of almond hulls was higher than other hulls.
Abo-Donia, F. M., Abdel-Azim, S. N., Elghandour, M. M. Y., Salem, A. Z. M. Buendía, G., & Soliman, N. A. M. (2014). Feed intake, nutrient digestibility and ruminal fermentation activities in sheep-fed peanut hulls treated with Trichoderma viride or urea. Tropical Animal Health and Production, 46(1): 221-228.
Amaral-Phillips, D. M & Hemken, W. H. (2006). Using byproducts too feed dairy cattle. Cooperative extension service. University of Kentucky, USA.
Aregheore, E. M. (2001). Growth rate, apparent nutrient digestibility and some blood metabolites of gwemble Valley goats on rations based on crop residues in the hot dry season in Zambia. Tropical Animal Health and Production, 33, 331-340.
Association of Official Analytical Chemists (AOAC). (2005). In: Official Methods of Analysiseighteenth ed. AOAC International, Gaithers-burg, Maryland, USA.
Bath, D. L., Dunbar, J. R., King, J. M., Berry, S. L., Leonard, R. O., & Olbrich, S. E. (1980). By-products and unusual feedstuffs in livestock rations. Western Regional Extension Publication No. 39, 22.
Ertl, P., Zebeli, Q., Zollitsch, W., & Knaus, W. (2015). Feeding of by-products completely replaced cereals and pulses in dairy cows and enhanced edible feed conversion ratio. Journal of Dairy Science, 99, 1-9.
Heuzé, V., Thiollet, H., Tran, G., Edouard, N., Bastianelli, D., & Lebas, F. (2017). Peanut hulls. Feedipedia, a programme by INRA, CIRAD, AFZ and FAO.
Hill, G. M. (2002). Peanut by-products fed to cattle. Veterinary Clinics of North America Food Animal Practice, 18(2): 295–315.
Menke, K.H., & Steingass, H. (1988). Estimation of the energetic feed value obtained from chemical analysis and in vitro gas production using rumen fluid. Animal Research Development, 28.
Menke, K. H., Raab, L., Salewski, A., Steingass, H., Fritz, D., & Schneider, W. (1979). The estimation of the digestibility and metabolizable energy content of ruminant feedstuffs from the gas production when they are incubated with rumen liquor in vitro. Journal of Agricultural Science (Cambridge), 92, 217-222.
Ørskov, E.R., & McDonald, I. (1979). The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage. Journal of Agricultural Science, 92, 499–503.
Palmer, J. (2010). The use of peanut by-products in stocker cattle diets. In: MSc. Thesis, Graduate Faculty of Auburn University.
Robinson. P. H. (2014). Almond hulls as a dairy feed. Cooperative extension specialist responsible for dairy cattle nutrition and nutritional management. University of California, Davis, USA.
Van Soest, P.J., Robertson, J.B., & Lewis, B.A. (1991). Methods for dietary fiber, neutral detergent fiber and non-starch polysaccharides in relation to animal nutrition. Journal of Dairy Science, 74, 3583–3597.
Wood, D. F., Williams, T. G., Offeman, R. D., & Orts, W. J. (2012). Focus on agricultural residues: Microstructure of almond hull. 244th ACS national meeting & exposition, p: 194.