VESTNIK
Bashkirskogo universiteta

RUSSIAN
ISSN 1998-4812

Archive | Volume 20, 2015, No. 3.

ON ENVIRONMENTAL AND GENETIC COMPONENTS OF DIFFERENCES IN GROWTH IN HEIGHT OF SCOTCH PINE ON FORMER FARMLANDS

Vestnik Bashkirskogo Universiteta. 2015. Vol. 20. No. 3. Pp. 889-891.
Tagirov V. V.
Bashkir State Agrarian University
34 50-letiya Oktyabrya St. 450000 Ufa, Republic of Bashkortostan, Russia.
Yanbaev Y. A.
Bashkir State University
32 Zaki Validi St., 450076 Ufa. Republic of Bashkortostan, Russia.
Email: yanbaev_ua@mail.ru
Tagirova A. A.
Bashkir State Agrarian University
34 50-letiya Oktyabrya St. 450000 Ufa, Republic of Bashkortostan, Russia.

Abstract

Some properties of Scots pine saplings of former arable lands, hayfields and pastures were studied in the forest-steppe zone of Uchalinsky administrative district of the Republic of Bashkortostan. 28 typical zones were selected on the “north-south” transect (100 km in length) with determination of number of saplings per hectare and height for each sample. At each sample zone, growth in height in 2013 was additionally measured for 30 saplings. It was revealed that almost everywhere in the studied area a natural reforestation is provided by Scots pine ( Pinus sylvestris L.) and silver birch ( Betula pendula Roth.). This fact can be explained by two main reasons: both species belong to the so-called “pioneer species” and they dominate in the forests of the Uchalinsky district. Environmental heterogeneities of the zones (spatial mosaic relief, differences in richness, physical and mechanical properties of soils, aerial and hydrological variation, species composition and abundance of herbaceous plants, etc.) should be considered as a dominating factor of variation of individuals in growth in height. High individual variation of annual growth in height of saplings within a single plot on ecologically relatively uniform space proves influence of genetic factors in territorial expansion of the pine on former agricultural lands. They can include differences in quality of maternal gene pool in different areas of reforestation, in proportion of seeds from self-pollination, unequal contribution of single trees in the provision of seeds, etc.

Keywords

  • • former agricultural lands
  • • Scots pine
  • • variation
  • • annual growth in height

References

  1. Bystrov G. E. Evraziiskii yuridicheskii zhurnal. 2012. No. 6 (49). Pp. 113–118.
  2. Muzafarova A. A. Chelovek i Vselennaya. 2006. No. 6(59). Pp. 34–39.