Broiler litter supplementation improves storage and feed-nutritional value of sawdust-based spent mushroom substrate

• Published in: Bioresource technology 2008-05, Vol.99 (8), p.2947-2955
• Main Authors: Kwak, W.S., Jung, S.H., Kim, Y.I.
• Format: Article
• Language: English
• Subjects: Agaricales - growth & development; Agronomy. Soil science and plant productions; Animals; Biological and medical sciences; Biotechnology; Broiler litter; Chickens; Feces - chemistry; Fermentation; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Hygiene; Lignin - analysis; Methods. Procedures. Technologies; Microbial engineering. Fermentation and microbial culture technology; Nutritive Value; Other nutrients. Amendments. Solid and liquid wastes. Sludges and slurries; Pleurotus eryngii; Polysaccharides - analysis; Silage; Soil-plant relationships. Soil fertility. Fertilization. Amendments; Spent mushroom compost; Spent mushroom substrate; Storage; Temperature; Use of agricultural and forest wastes. Biomass use, bioconversion; Waste Management - methods
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2007.06.021

A study was conducted to determine the effect of broiler poultry litter (BL) supplementation to spent mushroom substrate (SMS) on its storage and feed-nutritional value improvement. In Exp. 1, the sawdust-based SMS from a king oyster mushroom ( Pleurotus eryngii) farm was mixed with BL at 0%, 25%, 50%, 75% and 100% levels on a wet basis and deepstack stored for short-term (1-wk) and long-term (3-wk). At 1-wk of short-term deepstack storage, SMS with more than 50% BL levels showed favorable conservation. At 3-wk of long-term storage, all treatments except for BL 100% had a serious fungal problem. Based on chemical parameters, BL-blending to SMS practically improved the feed-nutritional value of the mixtures. Since the deepstacking method was not effective for long term storage, in Exp. 2 SMS ensiled with or without BL was attempted to improve long-term (3-wk) storage. All the ensiled treatments (SMS 100%, SMS 75% + BL 25% and SMS 50% + BL 50%) had desirable fermentation. As in deepstacking, BL-blending to SMS improved the nutritive value of the ensiled mixtures. The populations of total bacteria, lactic acid bacteria and yeast were highest ( P < 0.05) when 75% SMS was blended with 25% BL. In conclusion, blending 50% or more BL with SMS was effective for the short-term (1-wk) deepstack storage. For long-term (3-wk) storage of SMS, an ensiling method was effective with or without the addition of BL.