Saksıda sümbül (Hyacinthus orientalis cv. ‘Jan Bos’) yetiştiriciliği üzerine bir araştırma

Abstract

In this study, effect of ethephon which is a plant growth retardant as soil drench on plant height of Hyacinthus orientalis cv. ‘Jan Bos’ grown in pots was investigated. Ethephon substrate drenches, 150 ml/pot, consisted of 0, 250 and 500 ppm applied when shoots were 7-10 cm. Effect of ethephon on the flowering time, flower width and lenght, flower life, plant height, leaf length and chlorophyll content of leaves were determined. Plants were placed to the laboratuary (20 °C) at the sales stage (when 50% of flowers on the stem opened) to determine changes occur on the plant height. The shortest plant height was 8.17 cm obtained from the 500 ppm ethephon treatment and was 35% shorter than control. Concenration of 250 ppm ethephon resulted in 8.8 cm plant height and was 29% shorter than untreated control. Ethephon applications also reduced leaf lenght and had no effect on the flower life. Ethephon treatments increased the leaf relative chlorophyll content. The highest chlorophyll content was 80.92 CCI and obtained with 500 ppm ethephon application, while that of controls was around 51.49 CCI. The effects of etephon on plant height were similar and continued under postharvest conditions in which the shortest plant height (12.5 cm) was obtained with 500 ppm ethephon treatment.