Author/Authors :
ÖZBAKIR, Mehtap Ondokuz Mayıs Üniversitesi - Ziraat Fakültesi - Bahçe Bitkileri Bölümü, Turkey , BALKAYA, Ahmet Ondokuz Mayıs Üniversitesi - Ziraat Fakültesi - Bahçe Bitkileri Bölümü, Turkey , UZUN, Sezgin Ondokuz Mayıs Üniversitesi - Ziraat Fakültesi - Bahçe Bitkileri Bölümü, Turkey
Abstract :
This study was carried out to investigate the effect of different seed sowing dates on the growth of kohlrabi cultivars grown under Samsun ecological conditions during the autumn growing periods in 2005 and 2006. Five sowing times (15th July, 1st August, 15th August, 1st September, 15th September) and two cultivars (Korist F1, Kolibri F1) were tried for the autumn season. Quantitative analyses of the plants were done at 20 and 40 days after planting. The plant growth parameters investigated were; leaf weight ratio (LWR), stem weight ratio (SWR), root weight ratio (RWR), leaf area (LA), leaf area ratio (LAR), specific leaf area (SLA), leaf thickness (LT), net assimilation rate (NAR) and relative growth rate (RGR). RWR, SWR, LWR, LA, LAR, SLA, LT, NAR and RGR ranged between 0.04-0.29 g/g, 0.14-0.54 g/g, 0.39-0.78 g/g, 94.075-723.2 cm^2, 23.1-324.2 cm^2/g, 47.6-530.6 cm2/g, 0.002-0.021, 0.0002-0.0339 g/cm^2/day, 0.04-3.08 g/g/day for all quantitative analyses, respectively. Significant positive and negative correlations were also found among the plant growth parameters. The highest NAR and RGR values were determined in the plants which were sown on July 15 for autumn growing periods.
NaturalLanguageKeyword :
Kohlrabi , Sowing time , Variety , Plant growth.
