Influence of soil acidity on the effect of mineral fertilizing on Scots Pine plants

Iorova, K.

Gorskostopanska Nauka 14(1): 3-10


Accession: 000407592

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Pot experiments are described in which Scots Pine [Pinus sylvestris] plants were grown in soil of pH 4.20, 5.55, 6.40 and 7.20 with various rates of NPK application, and in soil of pH 4.80, 5.65, 6.70 and 7.45 without fertilizer application. Data are presented showing the effect of soil pH on the content of NH4 and NO3 nitrogen in the soil, and on the height growth and weight of the aerial part and roots of 1- and 2-year plants. Seedlings in the treatments without fertilizers grew well over quite a wide range of pH, from 4.5 to 7.0, the optimum being pH 4.5-5.5. Fertilizer applications caused increases in growth up to pH 5.5, but with higher pH growth was impaired, and the young plants died at pH 7.4.