Báo cáo lâm nghiệp: "Dynamics of light interception, leaf area and biomass production in the establishment year in Populus clones" pot

... the highest value occurring in clone 11-11 (0.8 g-MJ- 1) and the lowest in 111-5 (0.4 g’ MJ- 1 ). ). Dynamics of light interception, leaf area and biomass production in ... produc- tion during the establishment year was similar to that of light interception and LAI; the average tree of hybrid clone 11- 11 produced a total bi...

Ngày tải lên: 09/08/2014, 04:20

... Factors in uencing the amount and distribution of leaf area of pine stands, Ecol. Bull. 43 (1994) 102–114. [63] Vose J.M., Swank W.T., Assessing the seasonal leaf area dynam- ics and vertical leaf area ... trees. 2.2.2. Leaf area index Foliage was sampled from the 10-30-y-old plantations prior to budbreak in 2002 and in the fall of 2002, and from th...

Ngày tải lên: 07/08/2014, 16:20

... were found in the processes of the formation and structure of dead wood. A significant increase in the necromass volume in the optimum stage, confirming the observations of S and S ... 497–508 addition to the analysis of living trees, this procedure indirectly evaluates the variability of the dying-off of trees within individual developmental sta...

Ngày tải lên: 07/08/2014, 10:22

... since beech represents 99.2% of the canopy individuals in the plots of the study, regardless of the existence of patches of other species in the surroundings of the area. e total number of ... defined by the year of the seed production, which is one year before the germination of seedlings. In the first year of the study we distinguis...

Ngày tải lên: 07/08/2014, 10:22

... H j the mean height of competing saplings in quadrant j, and D j the mean distance between the competing saplings in quadrant j and the sample tree. In all the sapling, growth was assessed by the ... structural fragmentation of the canopy and the clustering pattern of nat- ural regeneration [15] lead to a high spatial variability of light in the unde...

Ngày tải lên: 08/08/2014, 00:21

... 5% of full sunlight (~ 58%), suggesting a priority in root growth unless light is severely limited. Leaf weight ratio, specific leaf area, and leaf area ratio increased with the degree of shading, ... been initiated under FL before the start of the experiment and, unlike seedlings growing under FL and LS, only a small portion of the leaves actually initiated...

Ngày tải lên: 08/08/2014, 00:22

... estimating linear increment of litterfall from 0 to value observed in the 20- to 26 -year- old stand, then value for 26 -year- old stand was used from 15 to 30 years, value observed in the 40- to 46 -year- old ... thank Erwin Ulrich, manager of the Renécofor network at ONF Fontainebleau, for providing unpublished data concerning the Douglas-fir sites of the network, and...

Ngày tải lên: 08/08/2014, 01:21

... developed in full sun. However, under each type of experi- mental condition during year n + 1, a clear influence of the light treatment of the pre- vious year (n,l was ... allowed comparison of the percentages of tissue volumes and air spaces in the leaf samples. In ec!rty leaves, palisade tissue and, to a greater extent, the...

Ngày tải lên: 09/08/2014, 04:20

... for trees growing in the first row (next to the track) in comparison with the group of trees from the second and the third row (11.1 and 8.8 m). On the other hand, the h/d ratio and height were ... slenderness quotient) in comparison with the treated stands (tending and tracks). It is obvious that the absence of thinning is the main reason causing th...

Ngày tải lên: 07/08/2014, 03:22

... probably the main reason and in the case of fl oodplain wood- land the grain size of the sediments can also be con- sidered. Also the in uence of diff erent silvicultural treatments of plants in the ... found to be the slow- est growing. Mode 2 (crown in the upper third of the stem) entirely prevails for the type of branching. Only in the case of...

Ngày tải lên: 07/08/2014, 10:21