At spawning, beds were covered with perforated transparent and black plastic sheet (0. 03 mm thick; 10 cm diameter holes were spaced 10 cm apart giving 25 holes/m2).

• 菇床覆以打孔的、透明的、黑色的塑料膜(0.；03 mm厚；孔直径10 cm；孔间距10 cm以保证25孔/m2)。