Screening of Cold-Adapted Strains and Its Effects on Physicochemical Properties and Microbiota Structure of Mushroom Residue Composting

Composting is an effective way to dispose of agricultural waste; however, its application limited in the winter and areas with low average annual temperatures. This study screened out a composite microbial agent (CMA) including Bacillus (B.) cereus QS7 B. pumilus QM6 that could grow at 10–15 °C investigated effects CMA as inoculant on physicochemical parameters communities compost made from mushroom residue mixed sheep manure. The results showed inoculation prolonged days high temperature above 60 °C. When ratio manure was 9:1, increased accumulation nitrogen, reduced electrical conductivity (EC). Under this ratio, accelerated degradation organic matter (OM) (decreased by 12.22%) total carbon (TOC) 8.13%) germination rate seed index (GI) 100% 106.86, respectively. Microbial community structure analysis relative abundance Flavobacterium 30.62% day 15 higher after condition, which than other groups, thermophilic fungi increased. demonstrated improves quality efficiency composting, it provides evidence improve low-temperature composting.