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Enhancing plant nutrient availability in composted paddy husk using Bacillus spp. isolated from termite (Coptotermes curvignathus) gut


Simol, Carlina Freddie and Chubo, John Keen and King, Patricia Jie Hung and Ong, Kian Huat and Chew, Cindy and Abit, Lirong Yu and Nawi, Khalid (2021) Enhancing plant nutrient availability in composted paddy husk using Bacillus spp. isolated from termite (Coptotermes curvignathus) gut. ScienceAsia, 48 (1). pp. 23-31. ISSN 1513-1874


Paddy husk (PH) is a waste item generated from rice production that can be used as an organic fertilizer through composting. High lignin content is an issue with PH composting as it impedes the production of high-quality organic fertilizer. Improvements to the composting process can enhance the agronomic properties of compost produced from PH. The objectives of this study were to: (i) determine the ability of Bacillus spp. in enhancing the decomposition of PH and (ii) determine the ability of Bacillus spp. in increasing the macronutrient content of composted PH. Different ligninolytic active Bacillus spp. from termite gut (either singly or a cocktail) were added to 7 of 9 compost boxes containing PH compost mixtures and were allowed to decompose for a period of 60 days. Each treatment was represented by 3 samples, and the compost boxes were arranged in a completely randomized design (CRD) with 3 replications. Results showed that the addition of Bacillus spp. promoted the production of matured compost within 60 days with significantly higher amounts of phosphorus, potassium, calcium, and magnesium. Germination index (GI) of all composted PH added with Bacillus spp. ranged from 82.51 to 95.83%, suggesting that composted PH has lower phytotoxicity than compost without Bacillus spp. isolate. In general, addition of Bacillus spp. to PH waste promoted the production of PH composts with improved macronutrient availability and lower phytotoxicity levels.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agricultural Science and Forestry
DOI Number: https://doi.org/10.2306/scienceasia1513-1874.2022.006
Publisher: Science Society of Thailand under Royal Patronage
Keywords: Compost; Paddy husk; Termite gut; Nutrient availability; Phytotoxicity
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 15 Oct 2022 13:19
Last Modified: 15 Oct 2022 13:19
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.2306/scienceasia1513-1874.2022.006
URI: http://psasir.upm.edu.my/id/eprint/97107
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