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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F14%3A00398819%21RIV15-AV0-67179843
rdf:type
n7:Vysledek skos:Concept
dcterms:description
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, 200 day-degrees (d°C, base temperature 3°C) after first emergence from undisturbed soil]. Analytical units in this study were emergence flushes. Flush magnitudes (maximum weekly emergence per count flush) and flush frequencies (flushes year1) 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 500 d°C following SSD; however, low levels of SSD-induced emergence were detected as late as 3000 d°C following SSD. Accordingly, stale seedbed practices that eliminate weed seedlings should occur within 500 d°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. 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, 200 day-degrees (d°C, base temperature 3°C) after first emergence from undisturbed soil]. Analytical units in this study were emergence flushes. Flush magnitudes (maximum weekly emergence per count flush) and flush frequencies (flushes year1) 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 500 d°C following SSD; however, low levels of SSD-induced emergence were detected as late as 3000 d°C following SSD. Accordingly, stale seedbed practices that eliminate weed seedlings should occur within 500 d°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.
dcterms:title
An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance
skos:prefLabel
An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance An investigation to enhance understanding of the stimulation of weed seedling emergence by soil disturbance
skos:notation
RIV/67179843:_____/14:00398819!RIV15-AV0-67179843
n3:aktivita
n8:I
n3:aktivity
I
n3:cisloPeriodika
1
n3:dodaniDat
n10:2015
n3:domaciTvurceVysledku
n15:8773424
n3:druhVysledku
n5:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
2525
n3:idVysledku
RIV/67179843:_____/14:00398819
n3:jazykVysledku
n16:eng
n3:klicovaSlova
tillage; seedbank management; stale seedbed; genotype–environment interactions; seed germination; Chenopodium album
n3:klicoveSlovo
n4:seedbank%20management n4:Chenopodium%20album n4:seed%20germination n4:tillage n4:genotype%E2%80%93environment%20interactions n4:stale%20seedbed
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[37205D15D718]
n3:nazevZdroje
Weed Research
n3:obor
n13:EH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
18
n3:rokUplatneniVysledku
n10:2014
n3:svazekPeriodika
54
n3:tvurceVysledku
Gonzalez-Andujar, J. L. Murdoch, A. J. Graziani, F. Forcella, F. Tørresen, K. S. Cirujeda, A. Neve, P. Dekker, J. Salonen, J. Benoit, D. L. Andersson, L. Tomasek, B. J. Tei, F. Davis, A. Schutte, B. J. Šerá, Božena Urbano, J. M. Rasmussen, I. A.
n3:wos
000329312400001
s:issn
0043-1737
s:numberOfPages
12
n17:doi
10.1111/wre.12054