Báo cáo lâm nghiệp: "Experimental research in ageing holm oak (Quercus ilex L ) coppices: preliminary results" ppsx

... for individual holm oak were devel- oped in Spain [6, 7] and in Italy [4, 5]. A

Ngày tải lên: 09/08/2014, 04:20

... that the control of flowering is at least partially located within the bud. This control could be related to morphological or biochemical properties of certain com- ponents ... organogenetic activity is presently under investigation to detect and localize within the bud the histological modifications specifically involved in the floral transition. .....

Ngày tải lên: 09/08/2014, 04:20

... global warming resulting from the increase in the volume of carbon dioxide in the atmosphere, particularly over the last decades (F, J 199 6). Following the climate analysis ... count and 9.5% in stand volumes) and sycamore (3.8% and 3.5% respectively). Other species’ total share (spruce, goat willow, aspen poplar, mountain ash, hazel, mountain elm, ash) is l...

Ngày tải lên: 07/08/2014, 03:22

... (,’3uppl 1), S29-S85 Lichtenthaler H.K. & Rinderle U. (1988b) Chloro- phyll fluorescence as vitality indicator in forest decline research. In: Applications of Chloro- phyll Fluorescenc!a. ... Lichtenthaler, 198 8). The registration of the different chlorophyll fluo- rescence parameters (Lichtenthaler, 1987; Lichtenthaler et al., 1986; Lichtenthaler...

Ngày tải lên: 09/08/2014, 04:20

... Vandœuvre-/ès- Nancy, France Introduction Ectomycorrhizal fungi are able in pure cul- ture to release organic acids and to solubi- lize insoluble minerals, such as insoluble phosphates ... pine (Pinus sylvestris L. ) and beech (Fagus silvatica L. ) rhizospheres. Materials and Methods Six month old pine and beech seedlings were grown on...

Ngày tải lên: 09/08/2014, 04:20

... proportion [19]. Finally, the effec- tive sizes of fathers per mother that we measured in our study (neglecting pollen contamination) are close to the low values that are expected in animal-pollinated species: ... from an ideal situation in which all clones contribute equally to the seed crop. Equal contribution of each clone would mean that all females have the same seed yield and that...

Ngày tải lên: 07/08/2014, 16:21

... less alarming levels (Hettelingh et al., 2005; online Appendix B1 available at www.afs-journal.org)and after the acid rain and forest dieback debate had receded in Europe and North America. In ... “stom- atal” in all journals in the “Forestry” subject category in WoS. A fading of physiology-related words in our corpus is there- fore likely to be induced less by a loss of topicalit...

Ngày tải lên: 07/08/2014, 16:21

... possible to unveil clues that will help in understanding wind-firmness in Mari- time pine, a subject that has been dealt with little in this species Silviculture and wind damage in Maritime pine ... [21]. The level of leaning pines has been mainly correlated with crown length in the dominant storey. When it increases, the level of leaning pines decreases. This relation may be the tr...

Ngày tải lên: 08/08/2014, 01:21

... with visible symptoms of yellow - ing needles in the soil substrate from the air-pol- lution plot Hliníky (10 seedlings); – Spruce seedlings with symptoms of yellowing needles in the soil substrate ... nee- dles were significantly correlated with chlorophyll concentrations in visibly yellowed needles (from declining trees with more than 40% needle loss and visible needle chlorosis)....

Ngày tải lên: 07/08/2014, 03:22

... the following scheme: – only in the last needle age class (I), – only in the last but one needle age class (II), – and in the last three needle age classes (I+II+III). e degree of the assimilatory ... defolia- tion was classified as: – only in the last needle age class (I), – only in the last and in the last but one needle age class (I+II), – in the last three needle age classe...

Ngày tải lên: 07/08/2014, 03:22