Common Sunflower Seedling Emergence across the U.S. Midwest. Issue 1 (March 2014)
- Record Type:
- Journal Article
- Title:
- Common Sunflower Seedling Emergence across the U.S. Midwest. Issue 1 (March 2014)
- Main Title:
- Common Sunflower Seedling Emergence across the U.S. Midwest
- Authors:
- Clay, Sharon A.
Davis, Adam
Dille, Anita
Lindquist, John
Ramirez, Analiza H. M.
Sprague, Christy
Reicks, Graig
Forcella, Frank - Abstract:
- Abstract : Predictions of weed emergence can be used by practitioners to schedule POST weed management operations. Common sunflower seed from Kansas was used at six Midwestern U.S. sites to examine the variability that 16 climates had on common sunflower emergence. Nonlinear mixed effects models, using a flexible sigmoidal Weibull function that included thermal time, hydrothermal time, and a modified hydrothermal time (with accumulation starting from January 1 of each year), were developed to describe the emergence data. An iterative method was used to select an optimal base temperature (Tb ) and base and ceiling soil matric potentials (ψb and ψc ) that resulted in a best-fit regional model. The most parsimonious model, based on Akaike's information criterion (AIC), resulted when Tb = 4.4 C, and ψb = −20000 kPa. Deviations among model fits for individual site years indicated a negative relationship ( r = −0.75; P < 0.001) between the duration of seedling emergence and growing degree days (Tb = 10 C) from October (fall planting) to March. Thus, seeds exposed to warmer conditions from fall burial to spring emergence had longer emergence periods.
- Is Part Of:
- Weed science. Volume 62: Issue 1(2014)
- Journal:
- Weed science
- Issue:
- Volume 62: Issue 1(2014)
- Issue Display:
- Volume 62, Issue 1 (2014)
- Year:
- 2014
- Volume:
- 62
- Issue:
- 1
- Issue Sort Value:
- 2014-0062-0001-0000
- Page Start:
- 63
- Page End:
- 70
- Publication Date:
- 2014-03
- Subjects:
- Common sunflower, Helianthus annuus L
Abiotic influences on seed dormancy, -- regional environmental variation, -- seedling recruitment
632.505 - Journal URLs:
- https://www.cambridge.org/core/journals/weed-science ↗
- DOI:
- 10.1614/WS-D-13-00078.1 ↗
- Languages:
- English
- ISSNs:
- 0043-1745
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library HMNTS - ELD Digital store
- Ingest File:
- 6960.xml