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Content of pigments in the needles of Norway spruce and Scots pine in an area of cement production
2000
Mandre, M. | korsjukov, R. (Estonian Agricultural Univ., Tartu (Estonia). Forest Research Inst.)
The influence of air pollution from a cement plant on chlorophylls and carotenoids of the needles of Scots pine and Norway spruce was studied on the sample plots established at different distances from the emission centre in 1992, 1994 and 1999. No essential difference was observed in pigment concentrations in needles between 1992, when the emission of cement dust from the plant was very high, and 1999, when dust pollution had practically stopped. The negative influence on the synthesis of pigments in needles occurred through the alkalisation of soil and disbalances of mineral nutrients accumulation into the organism
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