Precisionssådd av höstoljeväxter

• Precision seeding of winter oilseed rape The project aimed at increasing knowledge of precision establishment of oil seed rape. The hypothesis was that precision sowing in rows with low seed rates and close placing of N will optimize crop autumn development, overwintering, and seed pay-off. In total 12 field trials were conducted in southern and middle Sweden during the harvest years 2019–2022. Treatments included seeding with Väderstad Tempo, 45 cm row spacing, and seeding rates of 20, 35, 50 and 65 plants per m2. As a reference seeding was also done traditionally with a Väderstad Rapid, 12,5 cm row spacing and 50 plants per m2. In average there were no effect of neither seed rate nor row spacing on yield. In individual field experiments where low seed rates yielded better than high seed rates, this followed on a well-developed oil seed rape plant with a high shoot- and root biomass and a large root neck diameter in late autumn. Physiological plant development was affected by seed rate. Number of leaves, root neck diameter and above and below ground biomass was negatively correlated to the seed rate while there was a tendency for the growing point being positively correlated to the seed rate. The number of leaves per plant, shoot and rot biomass and to some extent also root neck diameter and the height of growing point was positively correlated to accumulated day degrees during autumn.

Ämnesord

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Jordbruksvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Agricultural Science (hsv//eng)

Nyckelord

precisionssådd höstoljeväxter övervintring planttäthet precision seeding oil seed rape over wintering

Publikations- och innehållstyp

vet (ämneskategori)

rap (ämneskategori)