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|
|Deposited On:||01 Oct 2007|
|Last Modified:||31 Oct 2012 08:48|
|Refereed:||Peer-reviewed and accepted|
Available Versions of this Item
A suppressive index for spring barley varieties. (deposited 04 Apr 2006)
- A weed suppressive index for spring barley (Hordeum vulgare L.) varieties. (deposited 01 Oct 2007) [Currently Displayed]
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