Báo cáo lâm nghiệp: "Relationships between the parameters of aboveground parts and the parameters of root plates in Norway spruce with respect to soil drainage" docx

... correlation between the aboveground parameters and the depth of root plates in spruce trees growing both in waterlogged and in well-drained sites. According to our results, it seems that the roots of ... 353 JOURNAL OF FOREST SCIENCE, 56, 2010 (8): 353–360 Relationships between the parameters of aboveground parts and the parameters of...

Ngày tải lên: 07/08/2014, 10:22

... [18–20] in particular since these species acclimate to limited water availability by increasing their resistance to cavitation [13], one of the major causes of decline in the botanical species in the ... conditions. Vegetation, soil and climate have been described in detail by Man- neville [16]. In this area, the coarse texture (limestone bedrock out- crops) expl...

Ngày tải lên: 08/08/2014, 01:22

... of the image, rather than on the complete image of the ring at one time, since the grey levels of the lumens in the earlywood have a tendency to be brighter than in the latewood, in view of the ... determination of the cell wall proportion (Fig. 6). The effects of the treatments of the wood sample (embedding, slicing, drying…) and of the ima...

Ngày tải lên: 08/08/2014, 01:22

... percentage of mortality. On the other hand, in areas with lower yet evident load, both the rate of damage to the particular species and their mortality often fundamentally differ – with respect to the ... relationship is rather of polynomial than linear char- acter. With respect to the character of both param- eters it is evident that with increasing...

Ngày tải lên: 07/08/2014, 10:21

... means that larger seedlings survived better in some of the worst (lower survival) sites. In the sandy and warmest site of Tous and in the site of Chiva (mostly clayey soil with an intermedi- ate temperature ... At the conclusion of the test, the seedlings were carefully removed and their root growth determined by considering the white roots that grew ou...

Ngày tải lên: 07/08/2014, 16:21

... moderately declining and the length of mother roots per volume of soil (t value of 0.77 and probability of 0.447), the number of fine roots per length of mother roots (t value of –1.35 and probabil- ity of ... severity of waterlogging and of C. fusipes infection. Indeed, when all soil characteristics and root infection index were entered together in...

Ngày tải lên: 08/08/2014, 01:21

... differences between the thickest branch and thinnest one increases as and when the tree grows. • With tree ageing, living whorls also contained dead thin branches contributing to the inflation of the within-whorl ... achieved their maximal diameter and are now turning into declining branches. This zone constitutes in most cases the asymptote of the dia- meter pr...

Ngày tải lên: 08/08/2014, 01:22

... becoming increasingly important [8,9,31,55,65]. In China, tree ring chronologies studies started in the 1930s [34, 64]. Since then, research using tree rings has been conducted to understand the ... response to solar activity in the periodic bands of 5–8, 10–12 and 20–30 years. The wave signal of tree growth was also affected and amplified by the combined effect of...

Ngày tải lên: 07/08/2014, 16:21

... carried out in the morning between 07 00 and 12 00 h in the forest understorey and between 07 00 and 10 00 h in the clearing to avoid a mid-day stomatal closure. During the A-PPFD responses, the mean ... is the result of the negative and positive scaling of LMA with N m with respect to the irradiance and tree ASD, respectively. This sug- gest...

Ngày tải lên: 08/08/2014, 00:22

... under- lines the need to perform the test as closely as possible to the planting date [24]. The value of the RGP as an indicator of plant vigour is probably its main strength [30]. In the present study, ... test conditions and stocklot on RGP; (ii) the in u- ence of other seedling quality attributes on the expression of the RGP; and (iii) to examine the...

Ngày tải lên: 07/08/2014, 16:21