Naslov
Effect of daminozide and fertilizer application on the height and diameter of potted New England aster grown in the short photoperiod conditions

Autori
Vršek, Ines ; Hajoš, Dino ; Židovec, Vesna

Izvornik
Sjemenarstvo: genetika, oplemenjivanje bilja, cvjećarstvo i rasadničarstvo (1330-0121) 20 (2003), 3-4; 147-156

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Aster novae-angliae; daminozide; topdressing; short photoperiod

Sažetak
Abundant flowering and habit characteristics make perennials ever more interesting for pot plant production. As the production of most flowering pot plants is inconceivable without growth regulation, research was done (1992-1994) into the effect of daminozide (Alar 85), applied in two concentrations (2000 mg/l, 4000 mg/l), and topdressing with liquid mineral fertilizer (Fertina C), in 1, 5% concentration, on the height and diameter of potted New England aster - Aster novae-angliae cv. 'September Ruby' grown from top and from lateral cuttings under short photoperiod conditions. Plants were grown in two separate two-factor trials, set up according to the randomized block scheme. Statistical analysis was performed by the standard least squares method for general linear models. Plants grown from top cuttings with the application of 4000 mg/l daminozide were on average 8, 6% (1992) and 9.3% (1993)lower than untreated plants, while there were no significant differences in height in the last trial year. No significant differences in heught were recorded in plants grown from lateral cuttings. Daminozide application had no notable influence on plant daimeter reduction, with the exception on the last trial year in plants grown from lateral cuttings when the plants from trial combinations without daminozide had 19, 5% larger diamaters that those treated with 4000 mg/l of daminozide. A stronger effect on plant dimaeter was that of topdressing with liquid mineral fertilizer, so the diameter of plants grown from top cuttings was by 6, 6% larger in 1993, and by 16% larger in the last trial year compared to unfertilized plants. The results point to the conclusion that daminozide and topdressing have no influence on the height of plants grown from lateral cuttings in the short photoperiod conditions, and that their application for growth regulation is questionable, and in the case of this trial unjustified. Plants of approximately equal height and diameter can be obtained from both cutting types.

Izvorni jezik
Engleski

POVEZANOST RADA