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Asian-Australas J Anim Sci > Volume 17(12); 2004 > Article
Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2004;17(12): 1681-1688.
DOI: https://doi.org/10.5713/ajas.2004.1681    Published online January 1, 2004.
Nutritive Value of Wheat Straw Treated with Pleurotus Fungi
H. Fazaeli, H. Mahmodzadeh, A. Azizi, Z. A. Jelan, J. B. Liang, Y. Rouzbehan, A. Osman
Abstract
Soaked and pasteurised wheat straw was inoculated with five species of Pleurotus fungi (coded P-21, P-30, P-41, P-60 and P-90), packed in polyethylene bags and incubated in a fermentation chamber for 21 days. The chemical composition, in vitro digestibility and in sacco degradability of the treated and untreated straw were estimated using a complete randomised design consisting of six treatments and four replicates. In a feeding trial, in vivo digestibility and voluntary intake were determined in bulls, using a 3횞3 change over design. Dietary treatments were: 1) untreated wheat straw (UWS) as control; 2) fungal treated (P-41) wheat straw before mushroom formation (FTWS); 3) spent wheat straw (SPWS) after mushrooms were harvested. Apart from P-90, fungal treatment significantly (p<0.05) increased the crude protein (CP) and reduced the cell wall components of the straw. The in vitro dry mater and organic mater digestibility significantly (p<0.05) increased in the treated straw particularly with the treatments of P-41 and P-60. The in situ degradability and in vivo digestibility of DM and OM were significantly (p<0.05) increased in treated straws with the highest values observed for treatment P-41. The intake of DM, OM and digestible organic mater (DOM) were significantly (p<0.05) increased in cows fed FTWS.
Keywords: Fungal Treatment; Wheat Straw; Nutritive Value; Pleurotus


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