Data on the Density and the Dry Matter Production of Austrian Black Pine Varieties and Provenances

1990

S. 29-35

2 Abb., 3 Tab., 9 Lit. Ang.

Unselbständiges Werk

200053081

It was investigated the density of Pinus nigra ssp. and Pinus nigra ssp. laricio trees, aged 63-67, and estimated their dry matter production by multiplying the mean basal area increment with density. According to the investigation, the density of Pinus nigra ssp. laricio stems is higher in their lower part of 6m long than that of Pinus nigra ssp. nigra. In the section of 6-17 m the density of Pinus nigra ssp. nigra is higher, but the difference is not great (Fig.1). The estimated dry matter production of Pinus nigra ssp. laricio is more in the whole stem (Fig.2) and in every diameter group (Table 1). Pinus nigra ssp. laricio produces wood not only in a larger quantity during the same time, but also more valuable, regarding its technical properties. For gaining more experiences, the extract content and density of 11 provenances were investigated and their dry matter production estimated. The material originated from the experimental stand of the provenance trial series of age 18, established by the Forest Research Institute at Goedoello in 1962. The extract content of Marchese (Corsican), Jean (Spanish), Sampolo (Corsican) and Cuenca (Spanish) provenances compared to the Hungarian large-scale mixture, as to test, is significantly more, but is less than of the Hungarian Provenance Asotthalom (Table 3). The extract content of 4 provenances among the investigated 11 ones, namely of Asotthalom, Foret d'Olette, Velingrad and Orsova was relatively low (about 3%) (Table 3). The low extract content may be advantageous for pulp and paper industry. The density of the investigated provenances is not higher than that of the Hungarian large-scale mixture. Density of the Doloszk (Sowiet), Foret d'Olette (French) and St. Guilhem (French) provenances is less (Table 3). The dry matter production of the investigated provenances does not differ probably from that of the Hungarian large-scale mixture.