Preparation of mushroom (Agaricus bisporus) composts in controlled environments: Factors influencing compost bulk density and productivity

Anaerobically digested food waste in compost for Agaricus bisporus and Agaricus subrufescens and its effect on mushroom productivity

“…Higher N content in the compost at mixing would normally prolong the time needed for NH 3 clearance during phase II. 30 This was not observed here for the digestate straw composts. The higher start pH might have enhanced the NH 3 loss during phase I for these composts.…”

“…must have counteracted a possible stimulating effect from higher N content. Higher N content in the compost at mixing would normally prolong the time needed for NH 3 clearance during phase II . This was not observed here for the digestate straw composts.…”

“…Nitrogen content, in terms of digestate inclusion, was not decisive for A. bisporus yield in the present study; no relation of yield with C/N was found in experiment 3, or for the whole dataset. Noble and Gaze found a positive effect from increasing the initial nitrogen content from 16 to 31 g kg −1 . In the present study, other negative effects from increased digestate content, such as higher density, poorer gas exchange, more lumps, higher pH and ash values etc.…”

Wood production, wood technology, and biotechnological impacts

“…Mushrooms usually perform better on those of the wastes that have an higher nitrogen content (Tisdale et al 2006). Addition of nitrogen-rich supplements (inorganic and organic) such as ammonium sulphate, ammonium nitrate, urea, or organic nitrogen sources such as fish meal (10.2% N), soy bean meal (>7% N), chicken manure, and brewer grain (3.2-4.4% N) to improve the C/N rate in a growth substrate can therefore positively influence mushroom yields (Stamets 1993, Noble & Gaze 1996, Rajarathnam et al 2001, Noble et al 2002, Demirer et al 2005, Tan et al 2005. Growth substrates might also be supplemented with micronutrient fertilisers.…”

The Development of a Dynamic Flux Chamber System for the Collection of Gaseous Emissions During On-Farm Composting of Animal Mortalities.

“…Beck-Friis et al (2001) report that NH 3 losses account for more than 98% of the total gaseous nitrogen loss in MSW compost. Generally NH 3 emissions correlate to temperature profiles and nitrogen content, tending to increase as the pile temperature increases (Beck-Friis et al 2001;Kuroda et al 1996;Martins and Dews 1992;Paillat et al 2005;Smet et al 1999) and with higher nitrogen contents (Noble and Gaze 1995;Martins and Dews 1992). In addition to increasing pile temperatures and nitrogen content, ammonia emissions seem to depend on seasonal variations, due to the increasing moisture content mainly caused by snow melt (Amon et al 2001;Parkinson et al 2004).…”