Bicol University R&D Journal

Official Refereed Journal of Bicol University

4500 Legazpi City,Philippines

Print ISSN: 0016-4139       Online ISSN: 2719-082X

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Vol 26, Issue 1
August 2023

CHED-JIP Recognized Journal as per CMO NO. 50, s. 2018.

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Solid Waste

Potential of Solid Waste Compost and Spent Mushroom Substrate in Earthfill Quarry Topsoil Rehabilitation

Publisher: Bicol University
Abstract

The increasing number of quarry activities in the Philippines has been causing extensive soil damage, altering its properties, and affecting the soil’s post-mining productivity. This problem was established in this study where earthfill quarried topsoil (QT) in Gubat, Sorsogon, Philippines, showed diminished soil physicochemical characteristics compared to sampled nearby topsoil with undisturbed vegetation (NQT). This study further assessed the potential of two compost materials, i.e., solid waste compost (SWC), and spent mushroom substrate (SMS), in helping reestablish QT’s quality. Fertility tests on both SWC and SMS showed relatively high levels of nutrients compared to other previously characterized materials and were employed as QT amendment to test its effects in growing IR64 rice. Central Composite Design (CCD) was used to determine compost-QT combinations (SWC or SMS added with peat moss and lime), if it would significantly affect rice’s germination rate, survivability, and overall growth. CCD showed that SWC alone and SMS with lime significantly affected several rice response parameters (p<0.05). These results were validated to compare the performance of QT added with SWC at different percentages (10, 20, and 30%) and SMS (50%) with decreasing amounts of lime (10, 7.5, and 5%). Here we showed that adding compost to QT improved rice’s rate of germination and development, shoot-root length ratio, and biomass but is more observable in SMS than SWC. In conclusion, the study provided preliminary evidence of the potential of locally produced SWC and SMS in improving quarried topsoil quality, whereby on-site trial and application must be considered.


Colleen E. Consuelo
Jan Britzmaine C. Meulio
Kenneth Raymund B. Garcia
Karen M. Pelaez
Clint Bernard C. Bulawan
Mary Louise N. Rapsing
Cezar Joshua T. Badiola
Joseph Martin Q. Paet

Soil Fertility
Central Composite Design
Rice Growth

April 23, 2024
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CHED-JIP Recognized Journal as per CMO NO. 50, s. 2018.

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Higher Education Regional Research Center, Bicol University East Campus, Legazpi City, Albay, Philippines

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