The content of chemical elements in the needles of Scots pine in the area influenced by the Kunda Cement Plant
2001
Ots, K. (Estonian Agricultural Univ., Tartu (Estonia). Forest Research Inst.)
To study the impact of cement dust pollution on the content of mineral elements in the needles of Scots pine (Pinus sylvestris L.), sample plots (7) were established in different directions and at various distances from the Kunda cement plant, with being established control stands in a relatively unpolluted area of Lahemaa National Park. The selected stands were similar as to their density, quality class, age, site type and species composition (0.7-0.8, II quality class, average density or sparce understorey, 75-85-year-old Myrtillus site type pine), which made it possible to compare the data obtained. On the territory close to the cement plant, the Ca, K and Fe content in the needles has risen. However, the content of Mg and Mn has decreased. The Mn content changes in the needles are in positive correlation with the distance from the plant
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