Báo cáo lâm nghiệp: "Allocation of dry matter in Eucalyptus in response to nitrogen supply grandis seedling" ppsx

... led to incorrect interpretations because of failure to recognise that it changed with ontogeny Allocation of dry matter in Eucalyptus grandis seedlings in response to nitrogen ... 1985). In this paper, we ex- amine the way in which rate of nitrogen supply to E. grandis seedlings affects allo- cation of dry matter. Material...

Ngày tải lên: 09/08/2014, 04:20

... super-ellipsoid. In the second phase, par- tial complexes of vectors are divided according to species ordinate in particular vectors and accord- ing to abundance of particular species (indicators) as ... ese indicators are automatically selected by the program in compliance with species spec- trum of particular vectors (habitats) to end parts of ordination axis. Used...

Ngày tải lên: 07/08/2014, 03:22

... e in uence of the cutting intervention on the water regime of plots was found less pronounced mainly in 1989 – probably due to the absorption effect of the herbal synusia in the understorey ... aspects of this fact are reach- ing the top of the agenda. e potential reserves of “suitable” water are continually decreasing, mainly due to negative human activities. rif...

Ngày tải lên: 07/08/2014, 03:22

... sites. e interval be- tween seed years is 5–7 years, the beginning of fertility is at the age of 20 to 30 and it lasts till high age. Seeds germinate well in mineral soil. Most seeds fall to a ... very strong. Weeds pre- dominated in some places and thus enabled natural regeneration to grow. Some parts of PRP 3 were totally without seedlings. In total, 39,675 seedlings...

Ngày tải lên: 07/08/2014, 03:22

... trees to the number of living trees Ratio of the volume of dead trees to the volume of living trees Ratio of the number of recruited trees to the number of trees in stand Ratio of volume increment ... hectare (8 trees of fir and 20 trees of other species) of total volume of 0.48 m 3 /ha (Table 2). Annual loss of fir in the number of trees in relatio...

Ngày tải lên: 07/08/2014, 03:22

... harvesting and hauling machines do the processing of an ever-higher percentage of annu- al prescribed cut in the Czech Republic. e timber logging and hauling machines are mainly farm trac- tors, ... protection of forest soils against erosion due to logging and hauling activities. One of the criteria considerably affecting erosion is the bearing capacity of soil. e bearing ca...

Ngày tải lên: 07/08/2014, 10:21

... from 4 to 6 years after fire in Spain due to the small size of saplings at this time. Thinning can be performed with a clearing saw (portable swinging arm scythe) since the more expensive use of the ... explained by selection to increase chances of regeneration after burn- ing at a pre-mature age. In thinned plots, the increase in tree height during the two first years after fi...

Ngày tải lên: 07/08/2014, 16:20

... SE eggs/female 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (+)-α-pinene (-)-β-pinene (+)-3-carene Terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: ... (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pine...

Ngày tải lên: 07/08/2014, 16:20

... assess the extent of kino [12] and decay. To assess kino, discs were visually divided into eight radially-oriented sectors of equal size and the number of sectors with kino veins and/or pockets ... breeding is unlikely to be a useful means of re- ducing kino in plantation grown E. globulus.However,theas- sessment of kino induced in a controlled manner across geno- types thro...

Ngày tải lên: 07/08/2014, 16:21

... a greater spread of the values obtained, with the differentia- tion of Pinus Pinaster once again standing out. 3.2. Swelling strain Tables III and IV give the swelling strains in radial and tan- gential ... dimensional ageing of wood will be defined here as the loss of response of wood in relation to hygrothermal changes. This type of ageing is probably irreversible, which...

Ngày tải lên: 08/08/2014, 00:21