The horse chestnut (Aesculus hippocastanum L.) has been cultivated in Poland for nearly 400 years. It is frequently planted in urban spaces, along streets, in parks, within residential districts, as well as along roads in open landscape, and in historic palace gardens. The studied avenue of the horse chestnut trees is located along a local road to Krzymów, a village in NW Poland, Western Pomeranian Voivodeship (52.9824869 N, 14.3481286 E, 45-50 m a.s.l.). The avenue was planted in the 2nd decade of the 20th century. The trees forming the avenue (2.5 km long, east-west trending) are growing in a mid-field habitat (FIELD) and in a forest habitat (FOREST), which enables a comparison among trees growing in these habitats. Dendrometric analyses were performed on 100 trees, and dendrochronological analyses were performed for 32 trees, with equal number of trees sampled in each habitat. The FIELD chronology spans 103 years (1916-2018, EPS>0.85: 1922-2018), the FOREST chronology spans 101 years (1918-2018, EPS>0.85: 1929-2018). The average tree-ring width equals 2.82 mm, ranging from 1.56 to 3.31 mm (Table 1).
Files with data of horse chestnut tree-ring width and horse chestnut local chronologies (FIELD and FOREST chronology): 1st column - year, 2nd column and next - tree-ring width of individual trees in mm (tree1, tree2, …), next column - local chronology in mm (bold numbers), last column - number of samples in a given year.
(2023)