title: Influence of spawn rate and commercial delayed release nutrient levels on Pleurotus cornucopiae (oyster mushroom) yield, size, and time to production.
abstract: Pleurotus cornucopiae 608 was grown on a mixture of pasteurized cottonseed hulls (75% dry wt). 24% chopped wheat straw, and 1% ground limestone. The substrate was spawned at various levels (1.25%, 2.5%, 3.75%, or 5% wet wt) and not supplemented or supplemented with commercial delayed release nutrient (Campbell's S-41) at various levels (0%, 3%, 6%, 9%, or 12%). Maximum yield (weight of fresh mushrooms harvested at maturity) was obtained at 3.75-5% spawn level and 6% S-41 supplement. As supplement levels exceeded 6%, yields declined significantly. There was a negative correlation (r=-0.81) between spawn rate and days to production. As the spawn rate increased, the number of days to production decreased. By using a spawn rate of 3.75% of the wet substrate wt, it was possible to reduce the time to production by a mean of 9.2 days compared with a spawn rate of 1.25%.
authors.affiliation: Department of Plant Pathology, The Pennsylvania State University, University Park 16802, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Royse
mesh_terms: D018556:Crops, Agricultural / Q000191:economics / Q000254:growth & development*; D003470:Culture Media; D020076:Pleurotus / Q000737:chemistry / Q000254:growth & development*; D013997:Time Factors
chemical_list: D003470:Culture Media