Phenological observations of the planting of acorn maple (Acer platanoides), planted in urban conditions with the use of compost from wood and plant residues

The aim of the study is to compare the state of trees planted using standard technology using peat composts and experimental composts from woody plant residues. Objects of observation were the planting of Norway maple (Ácer platanoídes) in the city of Stupino, Moscow region. Plants were planted using traditional lowland peat composts and experimental composts using wood and plant residues (WPR). In the course of observations, the time taken by plants to pass through phenological phases was recorded, taking into account the inflof anthropogenic conditions. The observations were carried out according to the method of N.E. Bulygin within fi years (2014-2018). An observation route was drawn up along the avenue, where 25 plants on peat and 25 plants were planted with the use of woody plant residues compost in a checkerboard pattern with an interval of 5 m. The onset of each phenophase was recorded with three dates. The fi phenodata is the date when at least one of the representatives of the group entered a seasonal phenomenon. The second date when more than half of the representatives of the group were included in the seasonal phenomenon, this was the height of the phenophase. The fi date and end of the phenophase is the date when the last representative of the group of plants entered the seasonal phenomenon. The observation results were entered into the observation diary, on the basis of which the phenological spectrum was constructed. Phenological dates refl the following phases: swelling of buds, «green cone», appearance of leaves, yellowing, falling off. Timely passage of phenophases, corresponding to the natural and weather conditions of the area, indicates the satisfactory development of woody plants. A check on the condition of plantings in 2019 confi that compost from woody plant residues can be used for planting deciduous trees in urban conditions. Receiving composts from WPR is justifi from the point of view of the annual renewal of raw materials from which we obtain these composts (thinning, pruning, etc.) and the simplicity of the production technology. Replacing organic additives in the form of peat compost with compost from woody plant residues is economically benefi