An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance

A - Papers appearing in refereed journals

Schutte, B. J., Tomasek, B. J., Davis, A. S., Andersson, L., Benoit, D. L., Cirujeda, A., Dekker, J., Forcella, F., Gonzalez-Andujar, J. L., Graziani, F., Murdoch, A. J., Neve, P., Rasmussen, I. A., Sera, B., Salonen, J., Tei, F., Torresen, K. S. and Urbano, J. M. 2014. An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance. Weed Research. 54 (1), pp. 1-12.

AuthorsSchutte, B. J., Tomasek, B. J., Davis, A. S., Andersson, L., Benoit, D. L., Cirujeda, A., Dekker, J., Forcella, F., Gonzalez-Andujar, J. L., Graziani, F., Murdoch, A. J., Neve, P., Rasmussen, I. A., Sera, B., Salonen, J., Tei, F., Torresen, K. S. and Urbano, J. M.
Abstract

Enhanced understanding of soil disturbance effects on weed seedling recruitment will help guide improved management approaches. Field experiments were conducted at 16 site-years at 10 research farms across Europe and North America to (i) quantify superficial soil disturbance (SSD) effects on Chenopodium album emergence and (ii) clarify adaptive emergence behaviour in frequently disturbed environments. Each site-year contained factorial combinations of two seed populations (local and common, with the common population studied at all site-years) and six SSD timings [0, 50, 100, 150, 200day-degrees (d degrees C, base temperature 3 degrees C) after first emergence from undisturbed soil]. Analytical units in this study were emergence flushes. Flush magnitudes (maximum weekly emergence per countflush) and flush frequencies (flushesyear(-1)) were compared between disturbed and undisturbed seedbanks. One year after burial, SSD promoted seedling emergence relative to undisturbed seedbanks by increasing flush magnitude rather than increasing flush frequency. Two years after burial, SSD promoted emergence through increased flush magnitude and flush frequency. The promotional effects of SSD on emergence were strongest within 500d degrees C following SSD; however, low levels of SSD-induced emergence were detected as late as 3000d degrees C following SSD. Accordingly, stale seedbed practices that eliminate weed seedlings should occur within 500d degrees C of disturbance, because few seedlings emerge after this time. However, implementation of stale seedbed practices will probably cause slight increases in weed population densities throughout the year. Compared with the common population, local populations exhibited reduced variance in total emergence measured within sites and across SSD treatments, suggesting that C.album adaptation to local pedo-climatic conditions involves increased consistency in SSD-induced emergence.

KeywordsTillage; seedbank management; stale seedbed; genotype-environment; interactions; Seed Germination; Chenopodium album; lambsquarters chenopodium-album; ragweed ambrosia-trifida; Dormancy; Germination; model; photoinduction; recruitment; Compaction; Ecology
Year of Publication2014
JournalWeed Research
Journal citation54 (1), pp. 1-12
Digital Object Identifier (DOI)doi:10.1111/wre.12054
Open accessPublished as non-open access
FunderEuropean Weed Research Society - EWRS
Output statusPublished
Publication dates
Online19 Aug 2013
Publication process dates
Accepted17 Oct 2013
Copyright licensePublisher copyright
PublisherWiley
ISSN0043-1737

Permalink - https://repository.rothamsted.ac.uk/item/8w0z7/an-investigation-to-enhance-understanding-of-the-stimulation-of-weed-seedling-emergence-by-soil-disturbance

Restricted files

Publisher's version

Under embargo indefinitely

Total views: 3

Total downloads: 1

Views this month: 0

Downloads this month: 0