Báo cáo lâm nghiệp: "Radial variation of wood density components and ring width in cork oak trees" pptx

... effect of bark stripping on wood produc- tionincorkoak(Quercus suber L.) and problems of growth ring definition, in: Pereira H. (Ed.), Cork oak and cork, Proceedings of the European Conference on Cork ... average ring density; MND, minimum density; MXD, maximum density; EWD, earlywood density, LWD, latewood density; RW, ring width; LWP, latewood percentage; HI, h...

Ngày tải lên: 07/08/2014, 16:20

... heritabilities of latewood density initially decreased from the pith until ring 12 and then increased until ring 18, while ear- lywood density followed an oscillating pattern of variation. In their study of ... continuous line representing F = 1.56, and P < 0.05. (A) ED and LD; (B) EA, LA and LP. Genetic variation within ring wood density 113 latewood), an...

Ngày tải lên: 08/08/2014, 00:21

... pollutants in synergism with the intensive sucking of the beech scale.  e trend of foliage stabilized in 1992–2003 while defolia- tion markedly increased again in 2004 and 2005.  e trend of defoliation ... were summarized in many publications and were evaluated from diff erent points of view, especially regarding the structure and development of stands, includin...

Ngày tải lên: 07/08/2014, 10:21

... “Being negatively correlated with Earlywood Width and positively with Latewood Width, tree average Ring Density appears to Figure 2. Regression plot between Ring Width (RW) and Average Ring Density ... = Average Ring Density; MND = Minimum Density; MXD = Maximum Density; EWD = Earlywood Density; LWD = Latewood Density; LWP = Latewood Percentage; RW = Ring Width;...

Ngày tải lên: 08/08/2014, 01:21

... spectra of methanol solutions of 1.0 10 −4 M DPPH and of oak extract at 0.3, 1.0, and 3.0 g L −1 . Figure 2. Absorbance at 520 nm during reaction of 1.0 10 −4 M DPPH and1 .0gL −1 oak extract in methanol ... differ- ent methods of measuring antioxidant capacity: inhibition of methyl linoleate autoxidation, rate constant of reaction of DPPH with wood extracts, and...

Ngày tải lên: 07/08/2014, 16:20

... is now increasingly planted in Europe, both in afforestation of abandoned farmland and enrichment of forests [26]. In Gali- cia (NW Spain) a long term breeding program for this species was started in ... suspected, since the infection of this disease occurs through stomata in early spring. Bud burst explained some of the variation in leaf spot incidence (17–65% of the...

Ngày tải lên: 07/08/2014, 16:20

... precipitation deficit of about 100 mm with minimum soil moisture values occurring during summer. In contrast, during 2004 soil water content remained high. The mean values of rel- ative humidity of the air ... vary to a large extent depending on wood anatomy. Trees with ring- porous sapwood, e.g. oak, often con- duct water in only the outermost annual growth rings [13]. In cont...

Ngày tải lên: 07/08/2014, 16:21

... Links between wood machining phenom- ena and wood mechanical properties : The case of 0 ◦ /90 ◦ orthog- onal cutting of green wood, Proceedings of the 2nd International Symposium on Wood Machining, ... Murase Y., Relation between veneer quality and peeling sound in peeling of sugi, Proceedings of the 14th International Wood Machining Seminar, Paris-Épinal-Cluny, 12–19...

Ngày tải lên: 07/08/2014, 16:21

... ulmifolius Schott. and Calycotome villosa (Poiret) Link. In the three areas, populations are more and more disturbed and fragmented as a result of an increasing clearing, over- grazing and overexploitation. ... the number of bands shared by samples x and y,andm x and m y are the number of bands in samples x and y, respectively. Genetic dis- tance (D) was estimated usin...

Ngày tải lên: 07/08/2014, 16:21

... Particularly, the resin canals appearing in the bark of conifers constitute a phys- ical and chemical barrier to the insect, and the characteristics of those resin canals of Picea spp. have been ... in inte- rior spruce, Can. J. For. Res. 34 (2004) 855–862. [44] Wainhouse D., Hylobius abietis – host utilisation and resistance, in: F. Lieutier et al. (Eds.), Bark and wood...

Ngày tải lên: 08/08/2014, 00:22