Yield, size, and mushroom solids content of Agaricus bisporus produced on non-composted substrate and spent mushroom compost

Abstract

Three crops of Agaricus bisporus were grown on non-composted substrate (NCS), spent mushroom compost (SMC), a 50/50 mixture of NSC/SMC, or pasteurized Phase II compost. NCS consisted of oak sawdust (28% oven dry wt), millet (29%), rye (8%), peat (8%), ground alfalfa (4%), ground soybean (4%), wheat bran (9%) and CaCO 3 (10%). Substrates were nonsupplemented or supplemented with Target Ò (a commercial delayed release nutrient for mushroom culture) or soybean meal at spawning or casing, or with Micromax Ò (a mixture of nine micronutrients) at spawning. Mushroom yield (27.2 kg/m 2 ) was greatest on a 50/50 mixture of NCS/SMC supplemented with 10% (dry wt) Target Ò at casing. The same substrate supplemented with Target Ò at spawning yielded 20.1 kg/m 2 . By comparison, mushroom yield on Phase II compost supplemented at casing or at spawning with Target Ò was 21.6 kg/m 2 and 20.6 kg/m 2 , respectively. On NCS amended with 0.74% or 0.9% Micromax Ò at spawning, yields increased by 51.8% (12.9 kg/m 2 ) and 71.8% (14.6 kg/m 2 ), respectively, over non-amended NCS (8.5 kg/m 2 ). Conversely, mushroom yields were not affected when Micromax Ò was added to a 50/50 mixture of NCS/SMC. Mushroom solids content was higher in mushrooms harvested from NCS amended with 0.74% Micromax Ò (9.6%) compared to non-amended NCS (8.3%).

Use of Spent Mushroom Substrate in New Mushroom Crops to Promote the Transition towards A Circular Economy

“…These substrate mixtures of NCS and SMS produced mushroom yields comparable to standard non-supplemented phase I compost [34,62]. A mushroom yield of 27.2 kg m 2 was obtained with a 50/50 mixture of NCS and SMS supplemented with 10% (dry wt) of a commercial delayed release nutrient at casing [33,34]. Moisture content of substrates significantly influenced mushroom yield [63].…”

Soybean the Main Nitrogen Source in Cultivation Substrates of Edible and Medicinal Mushrooms

“…In this research, the highest yield was observed for a millet/5% soybean substrate with an additional amendment of 5% delayed-release supplement which produced 21.3 kg/m 2 with a BE of 273%. Mamiro et al (2007) and Mamiro and Royse (2008) grown A. bisporus on noncomposted substrate containing ground soybean (4%), spent mushroom compost, and mixtures of them, non-supplemented or supplemented with different nutrients, obtaining yields comparable to non-supplemented Phase II compost. Results confirm the possibility of producing mushrooms on non-composted substrates.…”

Use of spent compost in the cultivation of Agaricus blazei

“…Mamiro et al (2007) studied the use of the spent compost, mixtures of spent compost with noncomposted substrate and the supplementation period of the compost in the cultivation of A. bisporus and obtained the lowest indexes of productivity (4.9 kg/m 2 ) and biological efficiency (25.7%), by using spent compost without compost supplementation and the highest indexes of productivity (27.2 kg/m 2 ) and biological efficiency (144.3%) were reached when a 50/50 mixture of spent compost with non-composted substrate was used and the Target® (commercial nutrient for mushrooms) supplement was added at the moment of laying the cover of the compost.…”