University of Tehran Iranian Journal of Horticultural Science 2008-482X 51 4 2021 02 19 Effect of different levels of soilless cultured cut rose debrises biochar and slow ‎release fertilizer on growth of Cyclamen persicum L. seedling Effect of different levels of soilless cultured cut rose debrises biochar and slow ‎release fertilizer on growth of Cyclamen persicum L. seedling 837 847 80582 10.22059/ijhs.2019.285775.1682 FA Maryam Fathi M.Sc. Student , Faculty of Agriculture, Shahrekord University, Shahrekord, Iran Saeed Reezi Assistant Professor, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran Hamidreza Motaghian Assistant Professor, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran Rahim Barzegar Assistant Professor, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran Journal Article 2019 07 20 Cut rose growers take out a high content of rose shoots as debrises throughout the year that can be use as a new nutrient content resources by some processes for plant nutrition. To evaluate the effect of biochar and slow release fertilizer on growth of<em>Cyclamen persicum </em>seedlings an experiment was conducted in a completely randomized design with six replications. Biochar fertilizer used at three levels (0, 2.5 and 5% w/w) and slow release fertilizer (15N- 10P – 20K- 3MgO- 13S+ TE) with polymer coating at three levels (0, 1.5 and 3 kg/m³) in a peat-moss and perlite medium mixed (60:40% v/v). The results showed that 5% (w/w) biochar accompanying with 3 kg/m³ of slow release fertilizer had the highest shoot fresh weight, width of the first leaf and total chlorophyll content. Three kg/m³ofslow-fertilizer showed the highestpercent of shoot dry weight, plant height, canopy width, leaf number, root length, leaf area and carotenoid content. In general, probably biochar and slow release fertilizer accelerated the growth due to increase in nutrition efficiency and reduced nutrients leaching in the medium. Cut rose growers take out a high content of rose shoots as debrises throughout the year that can be use as a new nutrient content resources by some processes for plant nutrition. To evaluate the effect of biochar and slow release fertilizer on growth of<em>Cyclamen persicum </em>seedlings an experiment was conducted in a completely randomized design with six replications. Biochar fertilizer used at three levels (0, 2.5 and 5% w/w) and slow release fertilizer (15N- 10P – 20K- 3MgO- 13S+ TE) with polymer coating at three levels (0, 1.5 and 3 kg/m³) in a peat-moss and perlite medium mixed (60:40% v/v). The results showed that 5% (w/w) biochar accompanying with 3 kg/m³ of slow release fertilizer had the highest shoot fresh weight, width of the first leaf and total chlorophyll content. Three kg/m³ofslow-fertilizer showed the highestpercent of shoot dry weight, plant height, canopy width, leaf number, root length, leaf area and carotenoid content. In general, probably biochar and slow release fertilizer accelerated the growth due to increase in nutrition efficiency and reduced nutrients leaching in the medium. https://ijhs.ut.ac.ir/article_80582_a21aaa8626b8356542c0e37c721c6749.pdf