ISHS Acta Horticulturae 167: II Symposium on Growth Regulators in Floriculture
PROPAGATION OF MAGNOLIAS FROM GREEN CUTTINGS USING VARIOUS FACTORS STIMULATING ROOTING AND GROWTH OF PLANTS |
| Author: | K. Bojarczuk |
| Abstract:
In the experiments cuttings of Magnolia soulangiana and M. kobus have been studied. The former rooted best when taken from maternal plants in the first half of July, while the letter towards the end of July. Current year shoots rooted best, with two or three nodes and a lateral slit at the base. They rooted well in the greenhouse and in double polythene tunnels. It was found that the best medium for the rooting of magnolia cuttings is a 2:1 mixture of peat with sand. The highest percentage of rooted cuttings was obtained after treating them with dust preparations of auxin /IBA 1.0–2.0%/ mixed with some phenolic compounds such as 0.4% rutin. During the winter the rooted cuttings were kept in a cool greenhouse at a temperature of 4–8°C and then in the spring they were transferred to pots and placed in a plastic tent. The best medium for the rooted cuttings was a 2:1 mixture of peat and compost soil with a polynutrient fertilizer "Azofoska" 2g/l of medium. The best growth of the shoots was obtained when a foliar nutrient feeding /Florovit/ was applied at 15 ml/1 of water or when a foliar spray with gibberellic acid /GA3/ at 50 mg/1 was employed. The magnolias growing in containers during the winter survived best in low polythene tunnels or when covered with a thick layer of saw-dust. | |
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