Hansen, Preben Klarskov; Rasmussen, Ilse A.; Holst, Niels and Andreasen, Christian (2007) Tolerance of four spring barley (Hordeum vulgare L.) varieties to weed harrowing. Weed Research, 47 (3), pp. 241-251.
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We investigated the tolerance to weed harrowing of four spring barley varieties and examined the possible interactions between varietal weed suppressive ability and two nutrient levels. Tolerance was defined as the combined effect of crop resistance (ability to resist soil covering) and crop recovery (the ability to recover in terms of yield). The weed harrowing strategy was a combination of one pre- and one post-emergence weed harrowing. In terms of yield, the four varieties responded significantly differently to weed harrowing and the response depended on nutrient level. At the lower nutrient level, weed harrowing caused an increase in yield of 4.4 hkg ha-1 for a strong competitor (cv. Otira), while there was no effect on yield at the higher nutrient level. For a weaker competitor (cv. Brazil), weed harrowing caused no change in yield at the lower nutrient level, whereas yield decreased by 6.0 hkg ha-1 at the higher nutrient level. There were marked differences between the weed suppressive ability of the four varieties when not harrowed, with less pronounced but significant differences when harrowed. Weed harrowing did not change the weed suppressive ability of a variety. Varieties that are tall at post-emergence harrowing and have increased density after pre-emergence harrowing, are the ones that benefit most from weed harrowing.
|EPrint Type:||Journal paper|
|Keywords:||weed harrowing; varieties;tolerance; resistance;digital image analysis;sensors; spring barley; Hordeum vulgare L. cultivars; weed competition|
|Subjects:|| Crop husbandry > Crop health, quality, protection|
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:||25 Apr 2013 17:32|
|Refereed:||Peer-reviewed and accepted|
Available Versions of this Item
Tolerance to weed harrowing in four spring barley varieties. (deposited 03 Apr 2006)
- Tolerance of four spring barley (Hordeum vulgare L.) varieties to weed harrowing. (deposited 01 Oct 2007) [Currently Displayed]
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