Báo cáo lâm nghiệp: ": Climate-tree-growth relationships of Quercus petraea Mill stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)" docx

... 2003) Abstract – The past history of a 300-year-old Quercus petraea stand (the “Futaie des Clos”, 8 ha) located 20 km from the town of Le Mans in the Forest of Bercé in the western part of France (Sarthe) ... slow increase from the beginning of the 20th century. Between 1910 and 2001, ring-width has increased of about 50%. The growth pattern of...

Ngày tải lên: 08/08/2014, 01:21

... toxicity induced stunting in seedlings raised at the 150 mg N regime (Fig. 3A and Tab. I). The consistent pattern in Figure 2 with trends in the conceptual model (Fig. 1) confirm suitability of the ... Landis T.D. (Eds.), Proceedings of the com- bined meeting of the Western Forest Nursery Associations, USDA For. Serv., Rocky Mountain Forest and Range Expt. Station,...

Ngày tải lên: 08/08/2014, 00:22

... knowledge of the effects of soil moisture on soil C and N miner- alization in forests on Changbai Mountain, North- east China is limited. e primary objective of this paper was to deter- mine the ... northern slope of Changbai Mountain. Research of Forest Ecosystem, 2: 167–177. (in Chinese) C B.R., X G.S., D G.F., Z Y.H. (1981): e main soil groups and their...

Ngày tải lên: 07/08/2014, 10:21

... eccentricity of the stem that prevented the symmetric cutting of the two boards. The two boards of (a) and the southern board of (c) are examples of “non-red heart” (NRH); whereas the two boards of (b) ... only on the peripheral positions. Each vertical bar corresponds to the bottom log of one of the 87 trees tested, with the black mark giving the mean an...

Ngày tải lên: 08/08/2014, 00:22

... protocols for the anticipated degree of moisture stress on the site. The 60 g fertilization rate applied to the vicinity of the root zone inhibited root system proliferation, thereby lim- iting the ability ... is available concerning the ability of field-fertilized seedlings to avoid drought immediately following planting. This experiment was designed to examine the infl...

Ngày tải lên: 08/08/2014, 01:22

... America’s Forests: Gateway To Opportunity. Pro- ceedings of the 1978 Joint Convention of the Society of American Foresters and the Canadian Institute of Forestry, Society of American ... and species combination at 2 h intervals beginning at 0600 hours, and finishing at 2000 hours on 4 days during the last week of the experiment. On e...

Ngày tải lên: 08/08/2014, 18:21

... accumulation in the stems and roots after d207 (fig 5). This result highlights the role of the sensitivity of leaf area expansion to increasing [CO 2] in the determinism of the ... discrimination by the plant (Δ) is linearly related to the time-integrated value of the ratio of intercellular to ambient [CO 2] (c i /c a) and...

Ngày tải lên: 08/08/2014, 18:21

... litter. The im- portance of having knowledge of the amounts of each of these fractions is evi- dent since the return of elements to the soil will follow different recycling ... mature, the leaves reaching 55% of the total contribu- tion of the annual litter. iv) The leaves are the organs that contrib- ute most to the return of...

Ngày tải lên: 08/08/2014, 18:21

... metabolism in conifers, could play a role in forest decline. Monoterpenes are synthesized in leuco- plasts at the basis of needles and are transported into resin ducts where they are ... resembling the phenomenon of ’montane yellowing’. With the experiments presented here, we investigate the influen- ce of light quality on monoterpene-medi-...

Ngày tải lên: 09/08/2014, 04:20

... the next were observed when sampling took place in the same forest. Since a study of frost-shrinkage of small oakwood samples has shown that tangen- tial shrinkage (the ... in trees growing on hydromorphic soil or alongside streams (Heller, 1979) or the aggravating effect of rain or wet weather before frosts could therefore be explained...

Ngày tải lên: 09/08/2014, 04:20