Báo cáo lâm nghiệp: "Leaf eating insect damage on different poplar clones and sites" ppt

... leaf damage on 24 clones from Italy, Belgium and the Netherlands. Damage varied considerably, depending on the clones, sites, species and parental individuals. Clone’s ranks concord on the different ... Key to the common parents: clones with the same mother: Mx; clones with the same father: Px; clones with the same mother and father: Mx + Px. Insect damage on...

Ngày tải lên: 07/08/2014, 16:20

... Artificial damage and branching in Nothofagus 109 of branch size found along most shoots of N. dombeyi exhibit high degrees of resilience to localised damage. On the other hand, compensatory responses ... damage to axillary buds and its effect on the preformation of nearby buds, or from severe damage to a distal branch and its effect on the growth of a nearby branch. It may...

Ngày tải lên: 08/08/2014, 00:22

... After a short break research on the production of poplar clones Robusta and I-214 continued, P and M (2001, 2005) elaborated the volume production of these clones in the form of models ... stands of poplar clones Robusta and I-214 are presented in the paper. Models for an estimation of the structure of basic assortments of poplar stands were constructed separ...

Ngày tải lên: 07/08/2014, 10:21

... Morecroft and G. Landmann and one referee for their con- structive comments on an earlier version of this paper. REFERENCES [1] Abrams M.D., Genotypic and phenotypic variation as stress adap- tations ... relationship was found between total biomass and species richness of naturally co-occurring mosses and liver- worts under experimental drought conditions but not under constant co...

Ngày tải lên: 07/08/2014, 16:20

... be altered in their expression after reforestation depending on environmental conditions in a phenomenon known as planting shock, we have analysed the post-planting expression of pine stock quality, ... the effect of storage conditions such as tempera- ture, duration and root coverage, on the physiology of the seed- lings as well as the impact on their functional integrity and initi...

Ngày tải lên: 08/08/2014, 01:22

... distribution and extent of damage. In order to acquire relevant information on rodent impacts on forest regeneration, we mapped the cumulated damage to forest plantations in 13 regions within the Czech ... often damaged also under the ground level. On the other hand, in France, B-  et al. (2005) found most of the browsing marks on roots of trees, less frequently on stem...

Ngày tải lên: 07/08/2014, 10:21

... species on the total damage (PD all ) also increases. At high dominances, the difference and proportion of damage to a species and damage to all species approaches zero or is close to one. Statistically ... a species (D) with the difference in damage to a given tree species and damage to all species (DifPD) and the proportion of damage to a given species and damage...

Ngày tải lên: 07/08/2014, 10:21

... elasticity); (3) less vulnerability to xylem cavitation: and (4) stronger sto- matal control over transpirational water loss. On the other hand, plants species classified as water spenders have ... installed on the south side of the trunk of each tree and covered with a radiation and rain shield to eliminate bias caused by radiation heating. Measurements were carried out every 10 mi...

Ngày tải lên: 08/08/2014, 00:21

... species discrimination. The effects of species, irradiance regime, growth flush and their interactions on continuous morphological variables and on MCA fac- tors were estimated and tested with an ... and environmental constraints as interacting decline inducing factors”). REFERENCES [1] Aas G., Taxonomical impact of morphological variation in Quercus robur and Q. petraea: a cont...

Ngày tải lên: 08/08/2014, 01:22

... investigated under conditions of water deficit, in conjunction with detailed measurements of gas exchange. Materials and Methods Experiments were conducted in Lisbon, Portu- gal, ... Effects of water deficit on leaf growth and initiation in fast-growing tree species J.C. Metcalfe W.J. Davies 1 J.S. Pereira 2 1 Institute of Environmental and Biological...

Ngày tải lên: 09/08/2014, 04:20