Ocena jakości surowca drzewnego i zmienności wad drewna w rębnych drzewostanach świerkowych na terenie Beskidów
AbstractThe aim of this work was to assess the quality and variation of spruce round timber, The research was carried out on 15 sample plots. 16 model trees with various defects were chosen from each plot. The measurement concerned all wood defects within the current standard (PN-79/13-01011). They were characterized by means of indexes defining kit position on the trunk and their relative size in relation to the size of wood. The first part cif the research compared. using statistical tests, size of model trees in groups of plots according to their location within main regions of the Beskidy and to their altitudes. Spruce timber from the regions of Beskid Slaski and, next, Beskid Zywiecki N'as the best quality. Timber from the eastern regions of the Beskidy was worse quality. When the altitude was the criterion, timber from higher altitudes (700-1000 in above sea level) was better than from lower, The most frequent defects which spoiled timber quality were: defects of wood struc (mainly injuries and removed pith), defects of trunk shape (mainly ovality and curvature and rot. The second part of the research elaborated on timber quality variation over the trunk, The relations proved by high coefficients of correlation, were next described by means of equations of regression. The equations, especially in relation to different categories of knots, may be the basis for preparing the tables of knottiness of spruce round timber for the area concerned, Next the influence of selected features of sample trees on the location over the trunk and size of some wood defects was defined by estimating the parameters of equations for statistically significant relations. The results may be helpful both in foreseeing and in the current assessment of timber quality in stands.
|Other language title versions||The assessment of timber quality and of wood defect variation in mature spruce stands in the Beskidy Mts.|
|Publisher||Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie, MNiSW |
|Publishing place (Publisher address)||Kraków|
|Book series /Journal (in case of Journal special issue)||Zeszyty Naukowe Akademii Rolniczej im. H. Kołłątaja w Krakowie. Rozprawy, ISSN 1233-4189, (0 pkt)|
|Publication size in sheets||6.2|
|Citation count*||5 (2016-08-08)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.