Title

GROWTH AND YIELD PERFORMANCE OF WHITE OYSTER MUSHROOMS (Pleurotus ostreatus) WITH VARIOUS WOOD SAWDUST AND RICE STRAW SUBSTRATE COMBINATIONS

Author(s)

James Adrian N. Abiabi

Jamil M. Mangila

Affiliation

College of Agriculture and Forestry

Degree Program

Bachelor of Science in Agricultural and Biosystems Engineering

Contributor

Gether P. Enario, Ph.D. – Instructor/Adviser

Oliver S. Talip, Ph.D. – Chairman

Bernie P. Agustin, Eng. – Panel Member

Yunalyn Villantes, Ph.D. – Panel Member

Year

2026

Abstract

This study addressed the limited utilization of locally available agricultural waste materials, particularly sawdust and rice straw, as alternative substrates for White oyster mushroom (Pleurotus ostreatus) production in Ozamiz City, where limited mushroom production and dependence on imported mushrooms remains a concern. The study into the topic using specifically Mahogany, Falcata and Gmelina are limited as of the release of the research paper. It evaluated the mycelial growth, yield performance, and economic viability of white oyster mushrooms (Pleurotus ostreatus) grown under different sawdust and rice straw substrate combinations. The experiment was conducted at R.S. Tan Village, Maningcol, Ozamiz City, Misamis Occidental, from September to December 2025. The study was laid out in a Randomized Complete Block Design (RCBD) with three replications using a factorial arrangement. Treatments consisted of three types of sawdust: A1 – Mahogany sawdust, A2 – Falcata sawdust, and A3 – Gmelina sawdust; and four substrate ratios: B1 – 70% sawdust + 30% rice straw, B2 – 60% sawdust + 40% rice straw, B3 – 50% sawdust + 50% rice straw, and B4 – 40% sawdust + 60% rice straw, giving twelve treatment combinations. Results showed that sawdust type significantly affected mycelial growth, mushroom count, yield performance, and economic returns, while substrate combinations showed no significant effect on most parameters. Gmelina sawdust (A3) consistently produced the highest mushroom count, yield, and return on investment, while Falcata sawdust (A2) exhibited the fastest mycelial growth rate. The findings suggest that Gmelina sawdust combined with rice straw can be effectively utilized as a sustainable and economically viable substrate for white oyster mushroom production.

Keywords

economic analysis, falcata, gmelina, mahogany, mushroom yield, mycelial growth