Báo cáo lâm nghiệp: "Carbon and phosphorus relations in and non-mycorrhizal pine seedlings" pps

... photosynthesis and fine-root phosphorus concentration. The high level of fine-root phosphorus concen- tration in mycorrhizal seedlings indicates that phosphorus was being preferentially stored ... to adding phosphorus fertilizer to non-mycorrhizal plants for all parameters examined. In quantitative terms, adding high phosphorus had a far greater ef...

Ngày tải lên: 09/08/2014, 04:20

... production for Scots pine (Pinus sylvestris L.) in Finland using stand, site and climate factors, For. Ecol. Manage. 205 (2005) 215–225. Carbon sink of Finland’s forests 693 disciplines. These equivalencies ... Variation in tree growth in Finland: results from the 6th National Forest Inventory, Folia For. 407 (1979) 1–12. [67] Tomppo E., National forest inventory in Finland and...

Ngày tải lên: 07/08/2014, 16:20

... (1999) 13–29 (in German). [42] Wiegand J., Quetting M., Results in the remaining building sector and for furniture; investigation on the decision motives and knowledge on wood, SAH bulletin CSRB 3 ... overestimated and might in fact be rather low. This effect is linked to a far larger decrease of the standing volume of trees (and thus carbon) in the forests and of soil carbon...

Ngày tải lên: 08/08/2014, 00:22

... only one study investigated mechanisms of N stor- age and remobilisation in cork oak during winter and following spring [1] and none considered together dynamics of C and N during these periods. ... the two. 3.4. Seasonal changes in content and partitioning of winter C and N in plants Winter C and N represent the amount of C and N assimilated during labeling time, part...

Ngày tải lên: 08/08/2014, 01:22

... the increase in air temperature within 4°C with respect to the outside (Mordacq and Saugier, 1989). Measure- ments were performed at the end of the grow- ing season during ... be no intersection between the ellipsoids at the end of the first year. The light penetration was calculated at randomly distributed points P by calculating the extincti...

Ngày tải lên: 09/08/2014, 04:20

... amides, asparagine and glutamine; the amino acids, glutamate, aspartate, arginine and proline; and the ureides, allantoin, allantoic acid and citrul- line, are common and major ... usually begins as soon as new leaf and shoot growth slows in early summer. The initiation of storage is often indicated by an increase in arginine concentration...

Ngày tải lên: 09/08/2014, 04:20

... mainly due to its location in the middle of the agriculturally cultivated lands of Haná. e floodplain forest was significantly af- fected by the deforestation of subalpine and alpine areas in ... deficiency in the 5 th to 8 th age class, which can be explained by a period of de- creased interest in its planting in the second half of the last century. e high incidence of Engli...

Ngày tải lên: 07/08/2014, 03:22

... denser comparing to sparse one) for both investigated years (i.e. before and after thinning). Considering spacing of subvariants, the higher SWD values were observed in both E and A subvariants ... (c) to investigate changes of SWD with respect to stand density and thinning. MATERIALS AND METHODS Site and stand description: ere were two vari- ants of glass domes with adjust...

Ngày tải lên: 07/08/2014, 03:22

... beginning of longitudinal axial parenchyma (AP) formation. It was observed on May 14 in young trees. In the week before minimum and maximum temperature was 5.3°C and 23.2°C, respectively. In ... of Devo- nian origin and a part of the Adamovská vrchovina highland. As regards the type of relief, this is a part of broken highlands of folded and faulted structures and intrusi...

Ngày tải lên: 07/08/2014, 10:21

... study in the analysis of conducting area the relative conducting area (CA.k –1 ) and the respective index (CAar) were used. is index relates CA to the number of rings in sapwood, containing ... from the trend to increase ring conducting area with an improvement of the social class of tree position in the stand (Fig. 8A). Since the index is based on rings originating from sapwoo...

Ngày tải lên: 07/08/2014, 10:21