Resumen

The expectations for increasing periods of drought are becoming larger according to numerous authors. The susceptibility of subalpine tree species to drought provoke our interest to try to understand what will be their reaction to this natural climate change. For this purpose it is set experiment to determine the reaction of drought to 4 subalpine species – Norway spruce (Picea abies L.), Mountain pine (Pinus mugo Turra), Macedonian pine (Pinus peuce Grisebach) and Bosnian pine (Pinus heldreichii H . Christ). Different requirements are observed to imitate field conditions as close as possible. The saplings are taken from terrain with no disturbed soil substrate. The plants were placed in a 15 l container and at the beginning of the vegetation were situated in a specially built greenhouse. Precipitation regime is controlled by the irrigation system. The indicators for precipitation levels (for a drought from June to July and August scheme) were taken from the two previous real years, who had a significant influence on the species. Precipitation norm for control is taken from subalpine zone of the Rila Mountain. To determine the reaction of all the groups of saplings subjected to various circuits, at the end of the year is recorded the survivors.

Palabras clave: Drought stress subalpine saplings precipitation regime climate change.

2018-10-24   |   159 visitas   |   Evalua este artículo 0 valoraciones

Vol. 6 Núm.1. Enero 2014 Pags. 19-23 Ecologia Balkanica 2014; 6(1)