Rooting of the Cuttings of Coniferous Species of Dendroflora of the Baikal Region
DOI:
https://doi.org/10.37482/0536-1036-2024-5-27-39Keywords:
pine, spruce, cuttings, grafting, coniferous species grafting, root formation time, root system, watering, artificial reforestation, the Irkutsk RegionAbstract
The active development of production has a negative impact on the environment. Millions of cubic meters of forest are cut down annualy for production needs. These volumes need to be restored. Therefore, research in the field of reforestation is relevant and important. The aim of this study has been to evaluate the technology of rooting coniferous trees during summer grafting. Various terms of green cuttings of coniferous trees of the Pinaceae family were considered, common representatives in the region (Pinus sylvestris L., Picea obovata Ledeb., Picea obovata var. coerulea Malyschev, Pinus sibirica Du Tour) have been considered. The cuttings have been harvested in four terms, starting from the 3rd ten-day-period of June to the end of July. The grafting has been carried out in different conditions: in a green house with a fog plant and a climate chamber with manual watering. Several methods have been used to prepare the cuttings for planting: with and without needle removing on the lower part of the cutting. Before planting, the tested cuttings have been treated with the root formation preparation “Kornevin” (control grop – without treatment). As a result of the study, the optimal time for grafting coniferous trees for the Baikal region has been determined as the 3rd ten-day-period of June and July. The minimum rooting period for the cuttings has been figured out as 155 days. It has been noted that the cuttings whose lower part needles have not been removed, have taken root faster. Their rooting share is 10 % higher. The best rooting rate has been recorded in cuttings obtained from the plants Picea obovata Ledeb. and P. obovata var. coerulea Malyschev – 22–30%. The cuttings from Pinus sylvestris L. and P. sibirica Du Tour have a very low rooting share – less than 1 %. To determine the quality of rooting, biometric indicators of the formed roots have been obtained. The cuttings planted in the 3rd ten-day-period of June in cultivation beds with regulated fogging are characterized by powerful roots.
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Copyright (c) 2024 Е.Н. Киселева, М.А. Раченко, А.М. Раченко, И.М. Мокшонова (Автор)
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