Uman NUH | today: 07/08/2024
| Author(s) |
Бровді А. А., , , Величко Ю. А., , , Поліщук В. В., , , |
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|---|---|---|---|
| Category | The Agronomy | ||
| year | 2024 | issue | Issue number 104. Part 1 |
| pages | 108-115 | index UDK | 582.639.11:502.633/635:712.4 | DOI | 10.32782/2415-8240-2024-104-1-108-115 (Link) |
| Abstract | Goal. To determine the effectiveness of plant growth stimulants in the propagation of floribunda roses by semi-lignified cuttings. Methods. Rooting studies of floribunda rose cuttings were conducted in 2021–2022. It was based on the method of rose cuttings proposed by Peter Henderson. Roses were grafted with semi-lignified cuttings at the stage of coloured buds. Cuttings were cut with 2–3 buds from the middle part of well-developed annual shoots. The experiments were performed in three replications, 25 cuttings in each. Planting scheme: 5 × 4 cm, planting depth 2 cm. A mixture of sand, peat, humus and turf soil in a ratio of 1 : 1 : 1 : 1 was used as a substrate for rooting cuttings. Results. Treatment with growth stimulants significantly influenced the yield of rooted cuttings, the timing and course of rhizogenesis of floribunda rose varieties. The most effective growth stimulator was Grandis (90 % of rooted cuttings). Mass rooting began 7 days earlier than in untreated cuttings. The treatment of cuttings with Grandis growth stimulant contributed to the growth of the number of roots in plants. The number of the first order roots increased by 1.4–5.4 times, and the second by 1.1–2.9 times. The growth of annual shoots of plants using the stimulant Grandis did not differ significantly from the control variant, which is probably due to the redistribution of assimilants, which led to intensive development of the roots of treated plants. The greatest increase in vegetative mass was observed in plants treated with the growth stimulator Charcor. The average growth of annual shoots in this variant of the experiment was 11.85 cm. When using Charcorus, the cuttings formed a branched root system, with a maximum root length of 10.82 cm on average. Conclusions. It was determined that the yield of the studied genotypes rooted cuttings was 72 %. When using the Grandis growth stimulator, the average percentage of rooted cuttings increased to 90 %, and the mass rooting of cuttings began 7 days earlier than in the control variant. The Grandis growth stimulator promotes maximum growth of the number of roots in plants (up to 9.9–23.8 pieces, depending on the variety), and when using Charcorus, a branched root system is formed, with maximum root length of 10.9 cm and an increase in vegetative mass of 11.9 cm, on average in the group. | ||
| Key words | roses, floribunda, cuttings, growth stimulant, landscaping | ||