Diagnostics of the life condition of plants, represented by the windbreak forest fields in the south of Central Siberia

The purpose of the work is to determine the degree of compliance of woody plants of different species composition with environmental conditions and their vital state in the windbreak forest fi (WFF) in the south of Central Siberia. Research was carried out in 2020 at two sites. In the Abakan steppe, a system created in 1977 of 11 alternating singlerow forest strips of different species composition, pure in composition, was studied: Ulmus pumila L., LarixsibiricaLedeb.,BetulapendulaRoth, Populusbalsamifera L. At the time of the survey, birch WFFs were not preserved. In the Minusinsk foreststeppe, a 4row poplar and 2row pine WFF were examined. The assessment of the vital state of tree species in plantations was carried out visually for 100 specimens according to the method of V.A. Alekseeva. In the dry steppe subzone on rainfed lands in the poplar WFF, some specimens of trees have been preserved. The vital state of two plantations, represented by Siberian larch, was assessed in one as healthy, in the other as damaged, and by squat elm - as severely damaged. Standing density of Siberian larch in two WFF - 0.31 and 0.44 thousand pieces / ha, preservation 14,1 % and 20.0 %, respectively, stocky elm - 2,1 thousand pieces/ha, preservation 95 %. In the steppe zone, the vital state of the balsam poplar and Scots pine in the WFF is healthy. The density of standing of balsam poplar individuals is 0,45 thousand pieces/ha, safety - 20,5 %, Scots pine - 3.3 thousand pieces/ha, safety - 100 %. Reclamation functions were performed in the drysteppe subzone of the WFF created from the common elm, in the steppe zone of the WFF - from the common pine and balsam poplar. Of the four studied species, the most resistant ones were: Scots pine in the steppe zone, and squat elm in the dry steppe subzone. Squat elm and Scots pine corresponded to the growing conditions.