Mycelia growth performance of Agaricus bisporus in culture media of composts supplemented with Sesbania sesban straw and phosphate rock

Abstract

Alternate composts are used to improve button mushroom growth. Egyptian pea (Sesbania sesban) straw is used for the first time in growing mushrooms. WHS2 medium (30% wheat straw, 45% horse manure, 15% Egyptian pea (Sesbania sesban) straw, 5% CaSO4 and 5% phosphate rock) is considered best significant (p<0.05) compost extract for mycelial growth rates of Agaricus bisporus which reached 86.33 mm compared with the control (WH) 80.83 mm after 14 days. However, the lower growth rates have been recorded 46.50 mm and 53.83 mm on WCS2 and WCS1 media, respectively. As in the solid media, WHS2 broth is exhibited higher biomass weight of A. bisporus 4.24 g/L significantly (p<0.05), whereas, lower biomass weights were 1.60 and 1.73 g/L in WCS2 and WCS1 broths, respectively. Generally, Agaricus bisporus C9 (brown strain) has been growing best than A. bisporus F599 (white strain) as observed in the current study. In conclusion, using Egyptian pea (S. sesban) extract plus phosphate rock enhances the importance of the compost with horse manure compared with chicken manure for growing A. bisporus, in vitro.