Evaluation of Burma Reed as Substrate for Production of Pleurotus eryngii
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IGINAL ARTICLE
Evaluation of Burma Reed as Substrate for Production of Pleurotus eryngii Xian-lu Zeng • Jun-fang Lin • Li-qiong Guo Rong-wei Cao • Wei-qiang Zeng
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Received: 13 September 2012 / Accepted: 11 October 2012 / Published online: 31 October 2012 Ó Association of Microbiologists of India 2012
Abstract Burma reed (Neyraudia reynaudiana), a giant C4 grass, was included in substrate at the rates of 0, 20, 40 and 66 % to partially or wholly substitute sawdust and cottonseed hulls to evaluate its suitability for Pleurotus eryngii cultivation. Inclusion of 20 and 40 % Burma reed did not significantly affect linear mycelial growth, dry matter loss, spawn run period and fructification, and achieved high fruiting body yields and biological efficiency of 336.67 g/bag, 67.33 % and 342.15 g/bag, 68.43 %, respectively, which were not significantly different from 350.08 g/bag to 70.02 % obtained from the control substrate. Enzyme assay revealed that on the mixed substrates laccase and manganese peroxidase activity were significantly enhanced, but cellulase was significantly reduced in the middle stage of incubation as compared with the control substrate. Even on Burma reed substrate without sawdust and cottonseed hulls, fruiting body yield (313.56 g/bag) and biological efficiency (62.71 %) were satisfactory, although significantly lower than that on the control substrate. Therefore, Burma reed was a promising potential substrate for P. eryngii production to largely substitute sawdust and cottonseed hulls. Keywords Pleurotus eryngii Burma reed Cellulase Laccase Manganese peroxide Biological efficiency
X. Zeng J. Lin L. Guo (&) College of Food Sciences, South China Agricultural University, 483 Wushan Road, Tianhe District, Guangzhou 510640, China e-mail: [email protected] X. Zeng Jiaying University, Meizhou 514015, Guangdong, China R. Cao W. Zeng Lantian Farming Co., Ltd, Fengshun 514300, Guangdong, China
Introduction Pleurotus eryngii, also known as the king oyster mushroom for its special flavor and texture, is one of the most valued and delicious mushrooms cultivated and consumed worldwide. Sawdust, cottonseed hulls, corn stover, wheat straw, sugarcane bagasse, combined with various amounts of soybean meal, peanut meal, wheat bran and wheat bran etc., have been the proven excellent substrates for commercial production of P. eryngii and other mushrooms [1, 2]. However, as the prices of sawdust and cottonseed hulls increased or fluctuated substantially with the rapid expansion of commercial production of mushrooms, substrate cost rise has become a major concern for growers. Therefore, cheaper and locally available alternative substrates including various grasses have been trialed for production of P. eryngii or other mushrooms [3–5]. In China, many studies have been made and commonly concluded that grasses were superior to crop straws for cultivation of mushrooms, achieving higher fruiting body yields and similar or better quality [6], but most of them were reported in Chinese and often with
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