Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-24T12:41:12.308Z Has data issue: false hasContentIssue false
  • English
  • Français

Germination and Emergence of Little Barley (Hordeum pusillum)

Published online by Cambridge University Press:  12 June 2017

M. Leon Fischer ,
J. F. Stritzke  and
Robert M. Ahring
M. Leon Fischer
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
J. F. Stritzke
Affiliation:
Dep. Agron., Oklahoma State Univ., Stillwater, OK 74078
Robert M. Ahring
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Oklahoma State Univ., Stillwater, OK 74078
Get access Rights & Permissions [Opens in a new window]

Abstract

Little barley (Hordeum pusillum Nutt.) seeds germinated readily without pregermination chilling on substrates moistened with either water or 0.2% aqueous KNO3. Little barley seeds were physiologically mature and viable as early as 11 days after flowering. Pregermination chilling induced dormancy in mature seeds moistened with water, but not those moistened with 0.2% KNO3. Mature seeds frequently germinated better at alternating temperatures from 20C (16 h) to 30C (8 h) than at constant 20C. Germination of seeds after 1 week in a thermogradient table varied from 1% at 34C to 77% at 21C. Seeds were able to germinate over an extended period in the fall and spring. Forage and seed production were highest from the first fall planting date and decreased with later plantings. Plants emerging from seeds planted in March and April did not produce seed.

Keywords

Prechillingdormancyplanting datesseed maturitythermogradient
Type
Research Article
Information
Weed Science , Volume 30 , Issue 6 , November 1982 , pp. 624 - 628
Copyright
Copyright © 1982 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Ahring, R. M., Dunn, N. L., and Harlan, J. R. 1963. Effect of various treatments in breaking seed dormancy in sand lovegrass, [Eragrostis trichodes (Nutt.) Wood]. Crop Sci. 3:131–133.CrossRefGoogle Scholar
2. Ahring, R. M. and Todd, G. W. 1978. Seed size and germination of hulled and unhulled bermudagrass seeds. Agron. J. 70:667–670.Google Scholar
3. Albert, W. B. 1965. Control of little barley in coastal bermudagrass with atrazine and paraquat. Weeds 13:375–376.CrossRefGoogle Scholar
4. Clegg, M. D. and Eastin, J. D. 1978. A thermogradient generating sand table. Agron. J. 70:881–883.CrossRefGoogle Scholar
5. Dickens, R. and Moore, G. M. 1974. Effects of light, temperature, KN03, and storage on germination of cogongrass. Agron. J. 66:187–188.Google Scholar
6. Emal, J. G. and Conard, E.C. 1973. Seed dormancy and germination in Indiangrass as affected by light, chilling and certain chemical treatments. Agron. J. 65:383–385.CrossRefGoogle Scholar
7. Evans, R. A. and Young, J. A. 1975. Enhancing germination of dormant seeds of downy brome. Weed Sci. 23:354–357.CrossRefGoogle Scholar
8. Hitchcock, A. S. 1950. Manual of the Grasses of the United States. USDA Misc. Publ. 200 (2 ed). 1051 pp.Google Scholar
9. Hylton, L. O. and Bass, L. N. 1961. Germination of six weeks fescue. Proc. Assoc. Off. Seed Analysts 51:118–124.Google Scholar
10. Kearns, V. and Toole, E. H. 1939. Temperature and other factors affecting the germination of fescue seed. U.S. Dep. Agric. Tech. Bull. 638. 35 pp.Google Scholar
11. Sholar, J. R. and Stritzke, J. F. 1978. Effect of atrazine and paraquat on bermudagrass production. Proc. South. Weed Sci. Soc. 31:286.Google Scholar
12. Smith, A. E. 1974. How weeds influence the pasture environment. Proc. South. Weed Sci. Soc. 27:35–41.Google Scholar
13. Southern Weed Science Society. 1977. Weed survey. South. Weed Sci. Soc. Res. Rep. 30:184–215.Google Scholar
14. Steinbauer, G. P. and Grisby, B. H. 1957. Field and laboratory studies of the dormancy and germination of the seeds of chess (Bromus secalinus L.) and downy brome (Bromus tectorum L.). Weeds 5:1–4.CrossRefGoogle Scholar
15. Young, J. A., Evans, R. A., and Eckert, R. E. Jr. 1969. Population dynamics of downy brome. Weed Sci. 17:20–26.Google Scholar
16. Young, J. A., Evans, R. A., and Kay, B. L. 1973. Temperature requirements for seed germination in an annual-type range community. Agron. J. 65:656–659.Google Scholar