DYNAMICS OF TAXATION INDICATORS AND THE PHYTOSANITARY CONDITION OF PINUS SYLVESTRIS L. FOREST CULTURES ON LANDS RECLAIMED AFTER ILMENITE MINING IN THE SHERSHNIV FORESTRY

The study investigates the dynamics of forest mensurational indicators and the phytosanitary condition of Scots pine (Pinus sylvestris L.) plantations established on reclaimed lands of Shershnivske Forestry of Korosten Forest District (Branch "Capital Forest Office", State Specialized Enterprise "Forests of Ukraine"). The total area of such plantations exceeds 583 ha (9.9% of the forestry area). Analysis of 62 forest inventory plots covering 417.8 ha and four inventory cycles (1977, 1987, 1997, 2017) showed a consistent improvement of site quality class from III to I, transformation of forest site types from dry pine forests (A) to more productive pine-oak suborys (B), and an increase in growing stock. It was established that 67.0% of pine stands are located in foci of root rot (Heterobasidion annosum (Fr.) Bref.). In three temporary sample plots in 52-year-old stands, a statistically significant relationship was confirmed between the proportion of deciduous species (white acacia, silver birch) and the sanitary condition index: the plot with composition 9Ps1WA+SB showed the lowest index of 2.6 compared to 3.1–3.3 for pure pine stands. Mixed stands showed 3.3–15.0% higher productivity. A recommendation to transition from monocultures to mixed planting schemes is substantiated.