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- Title
Field emergence of Lamium amplexicaule L. and L. purpureum L. in relation to the annual seed dormancy cycle.
- Authors
Baskin, J. M.; Baskin, Carol C.; Parr, J. C.
- Abstract
Seedling emergence of <em>Lamium amplexicaule</em> L. and L. <em>purpureum</em> L. was monitored in field plots tilled at various times during the growing season, and the number of viable seeds in the soil was determined. In plots tilled in early spring, only seeds of <em>L. amplexicaule</em> germinated, but seeds of both species germinated in the same plots in autumn without further disturbance. Additional seeds of <em>L. amplexicaule</em>, but not of <em>L. purpureum</em>, germinated the following spring. In plots tilled in late spring and summer, seeds of <em>L. amplexicaule</em> germinated in autumn and the following spring, whereas seeds of <em>L. purpureum</em> germinated only in autumn. The number of viable seeds in the top 13 mm layer of soil ranged from 189 to 1216 m-2 for <em>L. amplexicaule</em> and from 131 to 854 for <em>L. purpureum</em>. These field results support those obtained in previous glasshouse-laboratory physiological studies on the annual dormancy cycle in the two <em>Lamium</em> species.
- Subjects
SEEDLINGS; LAMIUM; SEEDS; DORMANCY in plants; GERMINATION
- Publication
Weed Research, 1986, Vol 26, Issue 3, p185
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1986.tb00695.x