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Utilization of Palm Oil Midrib Biochar as Soil Amendment with a Newly Isolated Bacillus sp. SM11 for Growth Enhancement and Nitrate Reduction in Romaine Lettuce ( Lactuca sativa L. var. longifolia )

Author

Listed:
  • Sukhan Rattanaloeadnusorn

    (Division of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand)

  • Nopparat Buddhakala

    (Division of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand)

  • Thanasak Lomthong

    (Division of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand)

Abstract

Biochar is a carbon-rich material that enhances nutrient availability, soil quality, and microbial activity, improving plant growth and crop productivity. In this study, the palm oil midrib biochar (POMB) was used as a soil conditioner to improve the growth of romaine lettuce ( Lactuca sativa L. var. longifolia ), together with a biofertilizer containing a newly isolated bacterial strain SM11. The newly isolated SM11 was closely related to Bacillus siamensis , with 99.77% similarity based on 16s rRNA gene sequence analysis. POMB treatment improved the fresh weight of romaine lettuce by up to 181.33 ± 1.15 g plant −1 , which is equivalent to 160.27% growth enhancement compared to the control without POMB. By comparison, POMB treatment with a biofertilizer containing SM11 increased fresh weight to 275.67 ± 11.59 g plant −1 with a growth enhancement of 295.68%. The addition of SM11 biofertilizer also protected against disease during cultivation. The addition of POMB reduced nitrate accumulation in romaine lettuce from 631.38 ± 0.36 to 223.31 ± 0.20 mg kg −1 by 59.08% compared to the control. This study suggests a way to manage agricultural waste from local palm oil plantations, thereby reducing waste accumulation and adding value to palm oil waste by-products for agricultural benefit through a biotechnological process.

Suggested Citation

  • Sukhan Rattanaloeadnusorn & Nopparat Buddhakala & Thanasak Lomthong, 2023. "Utilization of Palm Oil Midrib Biochar as Soil Amendment with a Newly Isolated Bacillus sp. SM11 for Growth Enhancement and Nitrate Reduction in Romaine Lettuce ( Lactuca sativa L. var. longifolia )," Agriculture, MDPI, vol. 13(10), pages 1-11, October.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:10:p:1986-:d:1258768
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    References listed on IDEAS

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    1. Danilo Loconsole & Giacomo Cocetta & Piero Santoro & Antonio Ferrante, 2019. "Optimization of LED Lighting and Quality Evaluation of Romaine Lettuce Grown in An Innovative Indoor Cultivation System," Sustainability, MDPI, vol. 11(3), pages 1-16, February.
    2. Lindsay Keller & Omololu John Idowu & April Ulery & Mohammed Omer & Catherine E. Brewer, 2023. "Short-Term Biochar Impacts on Crop Performance and Soil Quality in Arid Sandy Loam Soil," Agriculture, MDPI, vol. 13(4), pages 1-15, March.
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