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A weed suppressive index for spring barley (Hordeum vulgare L.) varieties

Hansen, Preben Klarskov; Willas, Jakob and Kristensen, Kristian (2008) A weed suppressive index for spring barley (Hordeum vulgare L.) varieties. Weed Research Oxford, 48, pp. 225-236.

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A screening programme for crop variety competitiveness would ideally be based on only a few, non-destructive measurements of key growth traits. In this study we measured the weed suppressive ability of 79 varieties of spring barley in two ways: 1) directly, by weed coverage assessments under weedy conditions at three Danish locations in 2002-2004, and 2) indirectly, by non-destructive measurements of varietal growth traits under weed-free conditions in 17 other experiments in Denmark in 2001-2003. Based on just four varietal growth traits (reflectance, leaf area index, leaf angle and culm length), we successfully developed a method for indexing the weed suppressive ability of spring barley varieties. The suppressive index ranged from 12% in ‘Lux’ and 55% in ‘Modena’ in proportion to the 90% quantile coverage of all varieties. The index was validated against independent data from two locations in 2005 with 14 and 24 varieties and found valuable for future use in regular screening programmes.

EPrint Type:Journal paper
Keywords:cultivars, crop-weed interaction, competitive ability, variety testing, non-linear mixed modelling, weed suppression, sensor-based measurements, cereals
Subjects: Crop husbandry > Crop combinations and interactions
Crop husbandry > Weed management
Crop husbandry > Breeding, genetics and propagation
Research affiliation: Denmark > DARCOF II (2000-2005) > VI.2 (BAR_OF) Characteristics of spring barley varieties for organic farming
Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences
Denmark > SOAR - Research School for Organic Agriculture and Food Systems
Deposited By: Hansen, Preben Klarskov
ID Code:11294
Deposited On:01 Oct 2007
Last Modified:31 Oct 2012 08:48
Document Language:English
Refereed:Peer-reviewed and accepted

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