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A study of soil pH variation on the development of weeds from soil seed banks

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Author Affiliations

  • 1Dept. of Plant Biology and Biotechnology, University of Benin, Benin City, Nigeria
  • 2Department of Plant Science and Biotechnology, Federal University of Lafia, PMB 146, Lafia, Nigeria
  • 3School of Life and Medical Sciences, University of Hertfordshire, United Kingdom

Int. Res. J. Biological Sci., Volume 13, Issue (2), Pages 5-15, May,10 (2024)

Abstract

This study investigated the influence of soil pH variation on weed development originating from soil seed banks. Soil samples were subjected to distinct pH concentrations of 3, 5, 7, 9, and 11. The objective was to ascertain the effects of varying pH levels on weed species' development and diversity, thereby shedding light on potential implications for crop productivity. The study's significance lies in its exploration of the relationship between pH concentrations and weed diversity, with implications for crop management. If weeds, which possess adaptable traits, are compromised by pH fluctuations, the security of agricultural crops faces a similar threat. The experiment entailed exposing soil samples to diverse pH concentrations, with two sets of replicates and a control group. Initially, the samples were irrigated with a 300 ml solution, followed by subsequent applications of 200 ml every alternate day. Emergent weed counts were documented at four-day intervals over an 8-week period. The findings revealed noteworthy trends. At pH extremes of 3 and 11, reduced diversity was observed due to growth suppression, indicating the susceptibility of weed species to extreme pH conditions. Conversely, pH levels of 5 and 7 fostered greater diversity, suggesting that these moderately acidic to neutral pH ranges are conducive to a wider range of weed species' development. In conclusion, this study underscores the dynamic nature of soil pH and its potential ramifications for both weed diversity and crop health. As human activities continually impact soil pH, it becomes imperative to consider the potential consequences for agriculture. The outcomes stress the need for sustainable soil management practices to safeguard not only weed populations but also the vital agricultural crops that sustain humanity.

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