Uman NUH | today: 03/13/2021

The influence of the localization of the cuttings of the clone stock of the pumicelect on rooting

Author(s) Zamorskyi V.V., Doctor of Agricultural Sciences, , Uman National University of Horticulture, Ukraine
Category The Agronomy
year 2019 issue Issue number 95. Part 1
pages 177-189 index UDK 634.22.504
DOI 10.31395/2415-8240-2019-95-1-177-189 (Link)
Abstract In the specific conditions of the southern region of Ukraine, it is advisable to propagate the clone rootstock of stone fruit cultures of the Pumiselect by cutting. The rooting rate of woody cuttings is largely determined by their location on the shoot. The cuttings harvested from the basal part of the shoot were characterized by the best rooting rate, which was 55.2 ... 98.5%. The least rooting rate was observed in cuttings prepared from their terminal part of the shoot (0.0 ... 15.7%). A certain relationship has been established in the rooting rate of the cuttings and the diameter of the shoot, from which they are harvested. For cuttings, the diameter of which in the basal part was more than 8.2 mm, rooting was the best (80.5 ... 80.5%). With a decrease in the diameter of the basal part of the stem, their rooting rate decreased markedly (76.0 ... 0.00%). However, other characteristics of the shoot, from which they were harvested (water content of tissues, the number of nodes), to a lesser extent influenced the studied parameter. Analyzing the average values characterizing the source material for cuttings, it is not possible to isolate the trends of these or those indicators according to the characteristics of the general array of the general population. The average length of shoots suitable for cuttings is 120 cm, the average diameter is 6.0 mm. Shoots with such indicators provide a share of rooting of about half of the planted cuttings (46.0%). At the same time, the average indicators do not allow to isolate that part of the cuttings that provide a sufficiently high degree of rooting. It is impossible to separate the part that needs to be used already at the first stage of reproduction - harvesting shoots. The generalization of the average biometric indicators of the source material of the clone stock of the pumiselect (increments of last year) without ranking it during reproduction by grafting does not allow to establish the criteria by which this method of reproduction is appropriate. Perhaps the simplest and most obvious criterion for evaluating cuttings that root well is their diameter. The existing technology for the cultivation of clonal rootstocks of fruit crops by the cuttings method as applied to the root of the pumicelect provides a high degree of rooting of lignified cuttings, provided that their diameter in the lower part is at least 7.0 mm.
Key words biometric characteristic, clone stock, lignified cuttings, pumyselect, rooting.
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