Allelopathic effect of Oryza sativa L. (Rice) straw on Echinochloa crus-galli L. (Barnyard grass) and Ludwigia octovalvis (Primrose-willow)

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Research Paper 09/07/2023
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Allelopathic effect of Oryza sativa L. (Rice) straw on Echinochloa crus-galli L. (Barnyard grass) and Ludwigia octovalvis (Primrose-willow)

Bernard B. Balderas, Precelita L. Osillos
Int. J. Biosci.23( 1), 115-131, July 2023.
Certificate: IJB 2023 [Generate Certificate]


This experimental research determined the allelopathic effects of Oryza sativa L. straw filtrate and fine cuttings on the seed germination, seedling emergence, growth, and dry weight of Echinochloa crus-galli L. and Ludwigia octovalvis. It compared the average percent inhibition of Oryza sativa L. (rice) straw fine cuttings treatments against the positive and negative treatments. It employed the Completely Randomized Design (CRD) using five different treatments for each of the two weeds and was conducted under laboratory conditions and improvised greenhouse. All data were analyzed using appropriate statistical tools. Findings of the study reveal that the Oryza sativa L. straw filtrate can inhibit the germination of Echinochloa crus-galli L. and Ludwigia octovalvis seeds. Similarly, the rice straw fine cutting soil mix reduced the seedling emergence, height, leaf number, leaf area, and dry weight of the two weeds. The seed germination and seedling emergence were found to be significantly associated with the treatments. The allelopathic effects of the treatments were significantly different along emergence, growth, and dry weight of the weeds. The highest concentration of Oryza sativa L. straw fine cuttings (30 g) indicated the greatest inhibitory effects. The study concluded that the rice straw filtrate and fine cuttings can potentially inhibit the germination and growth of Echinochloa crus-galli L. and Ludwigia octovalvis seeds. It was recommended to further establish evidences about the inhibitory effects of rice straw wastes using field trials. The use of rice straw wastes was recommended to be integrated as components of environment-friendly weed control and management practices.


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