Characteristic of the Shape and Size of the Horizontal Crown Projection of Cherry Maak (Padus Maackii Rupr Kom) in Yekaterinburg

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UDС

630*536

DOI:

10.17238/issn0536-1036.2015.5.92

Abstract

Vital status and decorative qualities of cherry Maak (Padus Maackii Rupr Kom) trees at the plantings of greenery of Yekaterinburg vary widely depending on local factors affected on a particular planting. Accurate data about the peculiarities of the crown formation of the used plant species are necessary for optimizing the spatial patterns of existing plantings and for the proper design of new plantings.The following tasks were performed in order to study the needs of cherry Maak trees in free space for normal development of the crown: to fix the linear dimensions of the crown in different directions; to find out what is the impact on the development of individual parts of the crown caused by their exposure and interaction with neighboring plants; to determine the areas of the horizontal crown projections of the surveyed trees; to determine the distance between trees that does not violate their viability. The radiuses of the crown projections of cherry Maak trees in age from 30 to 50 years in group plantings were measured during the study. For a tree for each direction were noted the factors affecting on the development of the crown from this side, and the distance to the factor. The selection was sorted by “free” and “limited” conditions of development to determine the degree of deformation of the crown of the surveyed trees in the direction of free space and in the directions where there is an interaction with the crowns of neighboring plants. The average horizontal crown projection of the of the trees under full development in the conditions of group plantings of greenery in Yekaterinburg has a shape of almost an exact circle of radius 3,5±0,06 m. This indicator decreased by 21,2 % compared to the average for the entire set of measurements and is 2,8±0,07 meters in the direction of the space limitations. The expansion of the crown takes place in the direction of open space and the average radius increased by 26,5 % compared to the average for the entire set of measurements and it is 4,5±0,07 m. Considering that the average planting step of cherry Maak trees in terms of group plantings in the city of Yekaterinburg is large enough, approximately 5,1 m, the obtained deviations can be considered as the norm. The dependence between exposition of different parts of the crown on light side and the degree of their development was not installed. The average area of the horizontal crown projection of the cherry Maak trees under full development of the crown in terms of group plantings in the city of Yekaterinburg is about 40 m.

Authors

L.I. Atkina, Doctor of Agriculture, Professor 

Affiliation

Ural State Forest Engineering University, Sibirskiy trakt, 37, Ekaterinburg, 620100, Russia; е-mail:Atkina@mail.ru

Keywords

cherry Maak, crown projection, crown deformation, free and limited conditions of development.

References

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