Состояние древесных растений на объектах защитного лесоразведения и озеленения Калачевского района Волгоградской области

Abstract

The Kalachevsky district of the Volgograd region belongs to the regions that require stabilization of natural resources use. Land and forest reclamation and landscaping will ensure the resource potential of the district’s landscapes at increasing recreational and natural load. The studies have shown that differences in inventory parameters, development, fruiting and sustainability of plants are due to soil and climatic conditions, and anthropogenic impact. The research objects are woody species, predominantly of European habitats: sweet chestnut – Castanea sativa Mill.; Pallas pine (Crimean pine) – Pinus pallasiana D. Don.; European crab apple – Malus sylvéstris Mill.; white poplar (silver poplar) – Populus alba L.; white willow – Salix alba L.; English oak – Quercus robur L.; European ash – Fraxinus excelsior L.; Lombardy poplar – Populus nigra var. italica Münchh.; wych elm – Ulmus glabra Huds.; golden currant – Ribes aureum Pursh.; common lilac – Syringa vulgaris L.; Russian pea shrub – Caragana frutex (L.) K. Koch; common privet – Ligustrum vilgare L.; Oregon grape – Mahonia aquifolium (Pursh.) Nutt.; cinnamon rose – Rosa cinnamomea L. It was found that relatively stable species in the Kalachevsky district are European crab apple, golden currant (which has the best salinity resistance), Russian pea shrub, wych elm, Oregon grape, but they are inferior to poplars, willows, lilacs, chestnuts in inventory parameters and growth rate. The best performance on a number of economically valuable features were observed in chestnut, spruce, apple, poplar, willow, elm, ash, and rose. Chestnut, currant, Oregon grape, lilac, privet, cinnamon rose have the highest score of ornamentality for landscaping plantations. Chestnut, rose, and oak have the best fruiting rates; ash and privet have medium fruiting rates. The strongest stage of recreational digression is observed in areas remote from settlements: there is densification of plantings, lack of sanitary cuttings, medium passability. Areas near water sources, as well as public gardens and parks, require sanitary care, reduction of recreational pressure and the selection of species from the recommended range of trees and shrubs. In order to ensure the greatest sustainability of plantings and obtain a rapid silvicultural effect, perennial, fast-growing species as well as fruit shrubs recommended in the basic assortment should be included in the protective and landscaping plantations of the arid region.