LEVELS OF MAJOR FOLIAR CHEMICALS IN NEEDLES OF PINUS-MUGO IN BOHEMIANPEATBOGS

Levels of six foliar chemicals in needles of Pinus mugo subsp. mugus S c o p. and P. mugo subsp. uncinata (A n t.) Domin were evaluated in e ight peatbogs at different elevations (490-1350 m) from areas of Bohem ia thought to receive differing levels of industrial pollutants. Needl es of varying age, one to six years, from each of the sites were analy sed separately. The studied chemicals included nitrogen, potassium, ph osphorus, calcium, magnesium, and sodium. There were no substantial di fferences in levels of these chemicals at various elevations, among lo cations receiving differing levels of pollution or between the two tre e species. Levels of nitrogen and potassium decreased and calcium incr eased, with needle age. Some variation in foliar chemical levels were found in comparison with earlier reports on related species. The data are summarized in five tables and six figures.