RESPONS PEMBUNGAAN BEBERAPA KULTIVAR ANYELIR TERHADAP MODIFIKASI FOTOPERIODESITAS

Abstract

Carnation is one of popular ornamental cut flower in the world. One of the constraints in carnation cultivation is its low productivity. Stimulating the plant to undergo earlier reproductive stage to produce more uniform flowers was investigated. Application of photoperiod modifications was predicted to have more desirable effects in this case as far as it concerned. A research was conducted to find out the response of several commercial carnation cultivars (cv. Rendezvouz, Malaga, White Candy, Regio de Sole and Tornado) under different photoperiod (short day, neutral and long day) conditions. It was carried out at Indonesian Ornamental Research Institute from April to October 2006. An experiment was designed in a split-plot randomized complete block with three replications. Results showed that there were interactions between carnation cultivars and photoperiod modification on flower initiation and stalk length. Four from five carnation cultivars, i.e. cv. Regio de Sole, Malaga, Rendezvouz and Tornado, showed earlier flowering response under long day treatment. However, these cultivars produced shorter flower stalks compared to those under short and neutral day conditions. Flower initiation and stalk length of cv. White Candy were not influenced by any photoperiod modification. Photoperiod modification also affected on stem diameter. Under long day treatment, stem diameter decreased compared to those under short and neutral day conditions.