Choosing the Promising Climatypes of Scots Pine in Geographic Cultures in Different Forest Growth Conditions
The dynamics of growth, trunk productivity and survivability of 83 climatic ecotypes of Scots pine (provenance trial) tested in different forest growth conditions in the Boguchansky forestry of the Krasnoyarsk Krai is shown. In some areas with sandy and loamy soils, groups of climatypes were distinguished with different average height at the age of 40 years. A more stable growth was observed in climatypes conventionally named fast-growing (compared to control stands). Climatypes with average heights, representing the middle group, change their ranking position, especially in the last 15 years. A significant part of the slow-growing climatypes of the third group systematically remains behind the control ones in terms of growth speed. The stabilization of the ranking position by height increase in the studied climatypes at the age of 40 is not completed, the process of forming the structure of plantings has specific features due to the genetic properties of climatypes and their response to environmental factors. Different vegetation conditions of provenance trial growing revealed different environmental sensitivity and variability of growth parameters in the climatypes of the same name in the experimental plots. The average height and trunk productivity on loamy soil are by 100% or more higher than these characteristics of the same climatypes on a sandy soil. Within each plot, promising climatypes were selected, which are recommended as candidates for quality populations . Based on the assessment of the growth efficiency of the provenance trial the recommendations for the regional forest industry were formed, regarding the transport of the Scots pine seeds and specification of the seeding zoning in Krasnoyarsk Krai. Four seeding zones have been defined: 1. Turukhansko-Evenkiysky (to the north from 60°30′ N); 2. Angaro-Yeniseysky (60°30′–55°30′ N); 3. Sayansky (to the south from 55°30′ N); 4. Minusinko-Shushensky pine forests (53°49′–53°12′ N).