Zawartość składników pokarmowych w igłach sadzonek sosny zwyczajnej inokulowanej Thelephora terrestris

The changes of N, P, K, Ca and Mg content in Scots pine needles over 4 years of the experiment were estimated in 2 treatments – inoculated in laboratory with the ectomycorrhizal fungus Thelephora terrestris and non inoculated (control). The seedlings were grown in a greenhouse for one season and then planted out into post−agricultural soil. Statistically significant differences were found only for Mg concentration in needles of two−year−old initially inoculated seedlings. For both treatments N and K concentration differed between all analysed years of growth. In the case of P and Ca concentration differences were found neither for treatments, nor for years. Four−year−old inoculated seedlings had lower concentration of all investigated nutrients with the exception of Ca. In both treatments the concentration of nutrients was at optimal level for four−year−old seedlings’ growth. Obtained results suggest that environmental conditions as well as plant metabolism may influence the nutrient concentration in the needles more strongly than their uptake by ectomycorrhizal symbionts on the roots.