نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشآموخته کارشناسی ارشد، دانشکده کشاورزی و منابع طبیعی، دانشگاه اراک، اراک، ایران
2 استادیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه اراک، اراک، ایران
3 دانشیار، دانشکده کشاورزی و منابع طبیعی، دانشگاه اراک، اراک، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In prder to investigate the effect of long-day treatment during autumn and winter on quantitative and qualitative characteristics of Rosa hybrida ‘Dolce vita’, an experiment was conducted in completely randomized design with nine replications. Rose bushes were treated with increasing length of photoperiod to 16-h under six levels of light intensity includes 0, 85, 170, 255 and 340 µmol m-2 s-1 using HPS lamp and 85 µmol m-2 s-1 using LED lamp. Important factors of quantitative and qualitative yield such as shoot length, stem diameter, time of harvesting, renewal bud formation, quality index and vase life were affected by supplemental light treatments. Using supplemental light, the average time required for harvesting the flower was around five days lesser than the control plants. The highest number of renewal bud formation was observed in light intensity of 85 µmol m-2 s-1 using HPS lamp, respectively. In many traits such as plant height and stem length, stem diameter under flower, leaf number, leaf length and width, fresh and dry stem weight, flower quality index and vase life, 340 µmol m-2 s-1 light intensity was the best treatment.
کلیدواژهها [English]