The effect of different planting beds in the greenhouse on the yield and quality of cut roses

One ​​of the most important needs of hydroponic systems with substrate is to identify a suitable planting substrate using local (available and inexpensive) compounds. Accordingly, the aim of this study was to investigate the possibility of replacing cocopeat as an imported material with domestic materials in Iran and the effect of these substrates on the quantitative and qualitative characteristics of rose cultivar ‘maroussia’. Therefore, a greenhouse experiment was conducted in a randomized complete block design with four replications. The experimental treatments included 9 planting media: cocopeat (100%), perlite (100%), pumice (Lika) (100%), cocopeat 75% + zeolite 25%, perlite 75% + zeolite 25%, pumice 75% + zeolite 25%, cocopeat 50% + perlite 50%, cocopeat 50% + pumice 50% and perlite 50% + pumice 50%. The results showed that plants planted in cocopeat and cocopeat+zeolite substrates had the best vegetative and reproductive growth. The highest number of flowers per plant was observed in pure cocopeat (8.31) and cocopeat+perlite (7.81) substrates, which did not show a significant difference with the cocopeat+zeolite substrate (6.87). Adding zeolite to cocopeat, perlite, and lica improved the length of the flower buds and the number of flowers per plant compared to their pure substrates. Also, adding cocopeat to perlite increased the fresh and dry weight of the branches and the number of flowers. Based on the test results and the abundance of zeolite in Iran, a combination of 75 percent cocopeat and 25 percent zeolite is recommended.