Propagation of less-spread conifers
1998
Vaasa, A. (Estonian Agricultural University, Tartu (Estonia). Dept. of Horticulture)
The cuttings of 17 species and forms of coniferous tree were rooted to frames in Raja experimental garden. There were two frames, one of which contained ordinary garden soil and the other a mixture sand and peat in ratio 3:1. The cuttings were treated with 'Rhizopon' and culture of bacteria Pseudomonas putida. The cuttings in the frames were covered with cover veils. The maintenance of the cuttings consisted of sprinkling them with water, except on days when there was some precipitation. During the winter the cuttings were kept in the frames covered with spruce branches. In May 1997 the cuttings were dug out, the rooted cuttings were counted and the length of the main roots was measured. The cuttings of some species, such as Picea abies 'Nana', Picea abies 'Compacta' and Pseudotsuga menziesii formed no roots. Of the different forms, the best rooting results were recorded in the case of Microbiota decussata, Thuja occidentalis 'Semperaurea', Thuja occidentalis 'Recurva Nana' and Juniperus communis subsp. alpina
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