Abstract
Solid sisal waste fractions which included composted sisal boles and sisal leaves decortication residues supplemented with cow dung manure at various rates used singly and/or in combination as substrates were investigated for cultivation of oyster mushroom (Pleurotus HK-37). The effect of the test sisal waste substrates and cow dung manure of various supplementation rates were evaluated by mushroom yield, biological efficiency and mushroom size. Pinheads occurred in all substrates within 3 to 5 weeks of transfer of bags to the cropping room. The overall best results of mushroom production were obtained in a substrate combination of 50 % sisal leaves + 50 % sisal boles (based on 450 g wet weight substrate) supplemented by 30 % cow dung manure with the mushroom yield of 184.64 g fresh mushrooms/kg moist substrate weight and percentage biological efficiency (B.E) of about 63 %. Mushroom size of 6.10 was obtained in sisal boles substrate supplemented by 20 % cow dung manure. Least yield of 26.73 g fresh mushrooms/kg moist substrate weight and lowest B.E of 8.95 % were obtained from non-supplemented substrate of sisal leaves alone. The study concluded that, supplementation using cow dung manure may play an important role on increasing the yield and productivity of Pleurotus HK-37 on solid sisal waste fractions under the conditions investigated.
Highlights
Cultivation of Pleurotus species using lignocellulosic residues is the bioconversion process which offers the opportunity to utilize renewable bio-resources in the production of edible, protein-rich food (Sanchez et al 2002)
Regarding the total nitrogen content, the obtained data show that SL contained significantly higher amount being 1.68 % followed by SL:SB (25:75) being 1.53 % while SB recorded significantly lowest value being 1.14 %
SL contained the highest ash value being 26.21 % followed by SL:SB (25:75), 25.54 % while SB recorded the lowest amount being 12.25 %
Summary
Cultivation of Pleurotus species using lignocellulosic residues is the bioconversion process which offers the opportunity to utilize renewable bio-resources in the production of edible, protein-rich food (Sanchez et al 2002). The use of these residues in bioprocesses may be one of the solutions to bioconversion of inedible biomass residues into nutritious protein rich food in the form of edible mushrooms (Mshandete and Cuff, 2008). Many agricultural and industrial wastes can be utilized for production of Pleurotus species as a substrate. Composted sisal decortications solid wastes were demonstrated to be a suitable substrate for cultivation of indigenous edible mushroom including Coprinus cinereus, Pleurotus flabellatus and Volvariella volvocea (Mshandete and Cuff, 2008). The suitability of composted sisal bole alone and/or a mixture of the composted bole with sisal leaf decortication residues for Pleurotus HK-37 mushroom cultivation is yet to be established
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