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The impact of various greenhouse floor coverings on the growth of roses
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Seyyed Fazel Fazeli Kakhki *   , Mahdi Samangani , Nasser Beikzadeh , Morteza Goldani |
| Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran |
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Abstract: (330 Views) |
The reaction of the photosynthetic apparatus in capturing light energy depended on the arrangement of the leaves, stems, and side branches. This process accelerates in the substrate when the intensity of the absorbed photon flow passes from the light compensation point. To evaluate the effect of greenhouse floor covering on the growth rate of roses, an experiment was conducted as factorial based on a randomized complete design with three replications in a rose production greenhouse in the spring of 2020. The experimental factors included greenhouse floor mulch in four levels (aluminum foil, ceramic, white plastic, and concrete (control)) and the second factor of eight weeks of growth. The results showed that the maximum photosynthesis (17.1 µmol CO2m–2S–1) was recorded from aluminum mulch in the first growth week and the minimum of it (4.05 µmol CO2.m–2.s–1) was observed in the fourth growth week in concrete mulch. The trend changes in stomatal conductance (gs) was similar to the photosynthesis during the eight weeks of plant growth, but in the abaxial lower leaves, the stomatal conductance was higher than the value of abaxial in upper leaves. The maximum amount of weekly growth (18.7 cm) was due to the application of aluminum mulch in the first week of growth. The amount of plant growth was slow in all treatments, however, in the eighth week, the maximum amount of weekly growth with the amount of 13.3 cm was related to aluminum mulch, and the amount of weekly growth in ceramic, white plastic, and concrete mulches was recorded 12.0, 9.99 and 9.2 cm, respectively. In general, the results showed that the use of mulches that have a higher light reflection coefficient is effective and significant in increasing the photosynthetic power of lower leaves and helping to increase plant growth.
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| Keywords: Chlorophyll, Light reflected, Photosynthesis, Stomata Conductance |
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Full-Text [PDF 809 kb]
(64 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2024/06/29 | Accepted: 2024/09/23 | Published: 2025/02/26
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