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Weed suppressive ability of crop mixtures

Pers Berglund, Anna (2016) Weed suppressive ability of crop mixtures. Masters thesis, Swedish University of Agricultural Sciences , Department of Crop Production Ecology. .

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Online at: https://stud.epsilon.slu.se/9842/1/pers_berglund_a_161129.pdf

Summary

In order to assess the weed suppressive ability of a pea/barley crop mixture and the component crops in sole cropping, a controlled outdoor experiment was performed at The Swedish University of Agricultural Sciences, Ultuna, Sweden, in the summer of 2015. A substitutive completely randomized ex-perimental design was used with seven treatments and six replicates. The weed species planted in the experiment was Elytrigia repens (L.) Desv. ex Nevski. At three occasions leaf area index (LAI) was optically measured using a LAI-2200C Plant Canopy Analyzer. Two destructive harvests were taken in order to assess the biomass of different plant parts from each of the component species. At the first harvest leaf area was measured in order to calibrate the optical LAI data. The results revealed a good correlation be-tween optically obtained LAI and LAI data from the destructive harvest; pea had the highest LAI and the intercrop was intermediate to the component crops in monoculture. Presence of a crop (sole crop or intercrop) significant-ly diminished the growth of E. repens but there were no differences between sole crops and intercrop. Sole cropped pea and barley showed ability to compete against weeds at the first and the second harvest respectively whereas the intercrop showed an ability to compete at both harvests indicat-ing an advantage of the crop mixture in terms of weed suppression.


EPrint Type:Thesis
Keywords:Elytrigia repens (L.) Desv. ex Nevski, intercropping, LAI, LAI-2200C Plant Canopy Analyzer, leaf area index, pea, spring barley, weed, weed tolerance
Subjects: Crop husbandry > Production systems
Environmental aspects > Biodiversity and ecosystem services
Crop husbandry > Weed management
Research affiliation: European Union > CORE Organic Plus > PRODIVA
Sweden > Swedish University of Agricultural Sciences (SLU) > Crop Production Ecology
FP7 Grant Agreement Number:618107
Related Links:https://stud.epsilon.slu.se/9842/1/pers_berglund_a_161129.pdf, http://projects.au.dk/coreorganicplus/research-projects/prodiva/, https://www.coreorganic.org/Pages/Research-projects/Research-projects.html
Deposited By: Lundkvist, Dr Anneli
ID Code:33111
Deposited On:02 May 2018 05:14
Last Modified:11 Jul 2018 19:22
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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