Annual Pattern of Sulphur Content in Spruce Needles from Heavily and Less Polluted Areas

1996

S. 81-84

32 Lit. Ang.

Unselbständiges Werk

200101813

Needles of twenty years old spruces from Prednji vrh, an area affected by Sostanj power station, and from Pokljuka, Alps region, with a relatively unpolluted environment, were analysed for total sulphur (S,) and total nitrogen content (Nt). Sulphur measurements were taken in a period between April and August twice monthly, and in the period from August to April every four weeks (May 1993 - June 1994). Sulphur content in current and one year old spruce needles from Prednji vrh were much higher (current year needles 2.06 - 2.50 mg/g dry weight, 1993) than in needles from Pokljuka (current year needles 1.05 - 1.25 mg/g dry weight, 1993). Nitrogen contents and ratio Nt/St for current year needles from Pokljuka were higher (12.3 mg/g dry weight, Nt/St 10.2, November 1993) than in needles from Prednji vrh (10.8 mg/g dry weight, Nt/St 5.3, November 1993).