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Spent mushroom (Agaricus bisporus) compost

Spent mushroom compost is a viable and useful by-product of mushroom farming. After the mushroom crop is harvested, this organic material is steam treated to eliminate any pest, pathogens and weed seeds and then removed from the environment space. After the substrate has been pasteurized, it is referred to as spent mushroom compost. The material has been found to be good nutrient sources for agriculture because of its nutrient-status. It has a high cationic exchange capacity, and is very rich with macronutrients (N, P, and K) and micronutrients. It can be available fresh from the mushroom farm, or weathered by further composting. Spent mushroom substrate should be decomposed for at least 12 months either by natural weathering in pits or aerobic/anaerobic recomposting before use because it contains a lot of salt and unstable organic material. Spent mushroom compost contains about 1-2% nitrogen, 0, 2% phosphorous and 1, 3% potassium. In general, a good, organic compost, if used properly, can improve plant growth in poor or marginal soils.

Spent mushroom compost

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