جستجوی مقالات مرتبط با کلیدواژه « همکشیدگی حجمی » در نشریات گروه « صنایع چوب و کاغذ »

In this study, physical and biometric properties of wood and woody fiber of imported eight coniferous species in Kvhsarkndh Neka forestry project were studied. For this purpose, Forty eight healthy trees from eight coniferous species (Pinus taeda, P. radiata, P. Brutia, P. nigra, P. pinaster, P. longifolia, Cryptomeria japonica and Cedrus deodara) were selected. A 10 cm disk from each tree was cut to calculate the wood physical properties (critical density and volumetric shrinkage) and fiber biometry (tracheid dimensions and biometric ratios). Test samples (after removing pith of trees), which scattered all over the disk was prepared. The results showed that there is a significant differences between wood species imported non-native conifers in terms of physical properties and biometric. Maximum critical density and volumetric shrinkage, tracheid length, tracheid diameter, cell diameter, cell wall thickness, flexibility ratio, slenderness ratio, Runkel ratio belong to P. Borussia, P. longifolia, P. longifolia, P. longifolia, P. longifolia, P. Brutia, Cryptomeria japonica, P. Brutia and Cedrus respectively. Density, tracheid length and biometric ratios (flexibility, Raunkel and slenderness) of studied species was within the desirable range for the production of paper.