Effects of burial in soil on seed longevity and germinability of the winter annual weed wild barley (Hordeum spontaneum)

Elham Nozarpour, Mohsen Edalat, Elias Soltani, Carol C. Baskin, Jerry M. Baskin, Seyed Abdol Reza Kazemeini

Research output: Contribution to journalArticlepeer-review

Abstract

Hordeum spontaneum is a winter annual weed that reduces crop yields in Iran. The aim of this study was to quantitatively analyze the effects of burial on seed longevity and germinability and of water potential and temperature on germination. Seeds were placed in nylon-mesh bags and buried in soil in a semi-arid region on 1 July 2018 and exposed to natural temperature regimes. After 2 months of burial, seed viability started to decline with a slope of 0.0169%, and after 9 months all seeds were nonviable. Fresh seeds were dormant, but became non-dormant during summer via dry after-ripening. Thus, by late autumn (December) the seeds germinated to 100% in dark at 5 and 15°C. The base, optimum, and ceiling temperatures were 0.27, 17.5, and 25°C, respectively, at a water potential of 0 MPa. The hydrotime constant was 50.6–426.9 MPa h, base water potential −1.23 to −0.333 MPa and hydrothermal constant 1350.5 MPa °C h. These results can be used to predict timing and extent of weed emergence of H. spontaneum in crops and in planning for sustainable management strategies.

Original languageEnglish
Pages (from-to)155-166
Number of pages12
JournalWeed Biology and Management
Volume24
Issue number4
DOIs
StatePublished - Dec 2024

Bibliographical note

Publisher Copyright:
© 2024 Weed Science Society of Japan.

Keywords

  • hydrothermal time model
  • seed burial
  • seed dormancy
  • seed survival

ASJC Scopus subject areas

  • Agronomy and Crop Science

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