Among the raw materials of composting, the C/N ratio of straw
and spent mushroom substrate is too high, while the C/N ratio of
pig manure is too low, both of which are not appropriate for the
growth of microbe during the composting. W e mixed the spent
mushroom substrate, wheat straw and pig manure at the ratio of
3:5:18 (by dry mass) to prepare the compost matrix in order to ad-just the appropriate C/N ratio of the matrix to 30:1