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Anvendelse af falsk såbed, blindharvning og flammebehandling i højværdiafgrøder

Melander, Senior scientist Bo (1998) Anvendelse af falsk såbed, blindharvning og flammebehandling i højværdiafgrøder. [Pre-emergence weed control in crops of high value by means of a false seedbed techniques, weed harrowing, and flaming.] Paper at: 15 Danske Planteværnskonference / Ukrudt, Marts.

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Summary

På baggrund af nærværende undersøgelse med såløg har det ikke været muligt at påvise væsentlige forskelle mellem blindharvning og flammebehandling anvendt 1-2 dage før løgenes fremspiring. Da blindharvning er en betydelig billigere og mere miljøvenlig metode end flammebehandling, vil det være relevant yderligere at undersøge mulighederne for at anvende blindharvning i højværdiafgrøder.
Undersøgelserne viste også, at tidspunktet for blindharvning godt kan foregå 4-6 dage før fremspiring frem for 1-2 dage før, uden at effekterne mod ukrudt derved svækkes væsentligt. Tidligere blindharvning kan være ønskeligt i øverligt såede kulturer som såløg og -porre for at mindske risikoen for at skade kulturfrøenes kimstængler.
Falsk såbed anvendt i såløg havde ingen afgørende indvirkning på resultaterne. Derfor er der ikke grundlag for at foreslå en bekæmpelsesstrategi i såløg, som betyder en udsættelse af løgenes såtidspunkt for at give plads til et falsk såbed.

Summary translation

Two field experiments were conducted, one in 1995 and one in 1996, to study the prospects of using physical pre-emergence weed control methods in row crops of high value such as seeded onions, seeded leeks and carrots. The studies were made in seeded onions and the physical control methods used were a false seedbed techniques, pre-emergence flaming and pre-emergence weed harrowing. The methods should only be considered as a part of a weed control programme for the crop where other methods conducted post emergence are also included. Weed harrowing and flaming conducted one or two days before crop emergence were comparable in their weed controlling effects and they did not damage the onions significantly. Pre-emergence weed harrowing does not necessarily have to be conducted just before crop emergence. It may also be done four to six days before crop emergence without getting less weed control effect. The false seedbed technique were of no benefit to the use of the other control methods mentioned. Consequently, it cannot be recommended to delay the sowing of onions just to make it possible to do a false seedbed.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Subjects: Crop husbandry > Weed management
Research affiliation: Denmark > DARCOF I (1996-2001) > II.2 Vegetables
Deposited By: Bo Melander, Senior Scientist
ID Code:1616
Deposited On:08 Oct 2003
Last Modified:12 Apr 2010 07:28
Document Language:Danish - Dansk
Status:Published
Refereed:Not peer-reviewed

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