Báo cáo lâm nghiệp: "Insect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French Alps" doc

... predators produces changes in food chains. In forest stands influenced by human activities the reasonable game management and the regulation of game stock seems to be one of the main tools in forest ... consequently increase damage to nearby forest stands. – Insufficient and low-class hoofed game feeding in hard times. It is usually convenient to feed wildlife game acc...

Ngày tải lên: 07/08/2014, 04:20

... is again a theme of another research inclusive of determination of the elastic constant according to separate layers. Appropriate tests to determine parameters men- tioned above will be the ... density of plywoods significantly a ects the capacity of the material to dampen noise. To achieve good sound-proof properties materials of a density of 630 kg/m 3...

Ngày tải lên: 07/08/2014, 04:20

... concentrations during defence response in Nor- way spruce embryogenic cell suspension cultures induced by intracellular protein and wall prepara- tions from Sirococcus strobilinus mycelia. MATERIAL AND METHODS Plant ... embryo- genic cultures of Norway spruce (C) and in the cells elicited by mycelium protein fraction (PF) and mycelium wall frac- tion (W...

Ngày tải lên: 07/08/2014, 10:21

... primary productivity in ter- restrial ecosystems (J et al. 1999), N miner- Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China G. Q 1,2 , Q. ... is maintained at 20°C. For the given vegetation type of Changbai Mountain, soil C and N mineralization rate, potential mineralizable C (C 0 ) and potential ra...

Ngày tải lên: 07/08/2014, 10:21

... of plywood is available. Plywoods differ in many factors. CONCLUSION e aim of the paper was to propose the method- ology of testing the abrasion resistance of combined water-proof plywood materials ... aim of the paper was to propose the methodology of testing the abrasion resistance of combined water-proof plywood materials with the phenol...

Ngày tải lên: 07/08/2014, 10:21

... robur displays a larger tolerance to water-logging and associated root hypoxia [22, 23,53, 60]. This difference of tolerance to water- logging between the two oaks was used as a starting point to identify ... aiming at identifying morphological and physiological responses to root hypoxia that might differ between the two species. Potted seedlings were submitted durin...

Ngày tải lên: 07/08/2014, 16:20

... 929 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006076 Original article Modelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.) Patricia A a * ,IsabelC  ˜  b , ... A dominant height growth model and a site index model were developed for rebollo oak (Quercus pyrenaica Willd.) in northwe...

Ngày tải lên: 07/08/2014, 16:20

... P1 and P2 together, confirmed that damage was an explanatory factor which was much sig- nificant than the other variables and factors available. Thus overall, the damage factor had both a statistical ... A risk of fork emergence was calculated for each of the damage levels. The relative risk of fork emergence, with its confidence limit (at 5% of risk level),...

Ngày tải lên: 07/08/2014, 16:20

... 195208 â INRA, EDP Sciences, 2003 DOI: 10.1051/forest:2003012 Original article Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions ... average needle age, shoot length growth, and branching frequency in response to seasonal average integrated quantum flux density (Q int ) were in...

Ngày tải lên: 08/08/2014, 01:21

... 10.1051/forest:2003058 Original article Growth, damage and net nitrogen uptake in Picea abies (L.) Karst. seedlings, effects of site preparation and fertilisation Fredrik NORDBORG*, Urban NILSSON Swedish University of ... following hypotheses: (i) site preparation increases seedling initial growth and reduces damage during the first year after plant...

Ngày tải lên: 08/08/2014, 01:21

... Growth response of Q. pyrenaica to thinning 245 The results of Ducan’s test also explain the aforementioned different responses to thinning intensities in the two growth intervals (Tab. ... deviation (in bracket) absolute and relative stem diameter increment of Q. pyrenaica trees in unthinned and thinned treatments (C – light thinning; D – moderate thinning; E – heavy th...

Ngày tải lên: 08/08/2014, 01:22

... but Short note Insect damage to cones and other mortality factors limiting natural regeneration potential of Swiss stone pine (Pinus cembra L) in the northern French Alps L ... seed cones of P cembra, and then to measure the respective impact of insects and other mortality factors on the potential of natural...

Ngày tải lên: 08/08/2014, 18:21

... to compensate for plant C uptake (+ 52% ). Plant N concentration and C/ N ratio over the 22 -week growing period Original article Changes in carbon uptake and allocation patterns in ... elevated [CO 2 ], by -11 and +13% , respectively (table III). Drought increased plant C and N concen- trations in both CO 2 treatments. Carb...

Ngày tải lên: 08/08/2014, 18:21

... with air pollutants. According to Levitt (1980), two strategies can be distinguished: avoid- ance and tolerance. While avoidance stra- tegies include the cuticle and the stomata, tolerance ... lead to re- latively severe damage to trees, especially under unfavorable weather conditions and shortening of the vegetation period. The stomata can play...

Ngày tải lên: 09/08/2014, 04:20

... Physiological responses to low temperature O. Junttila Department of Plant Physiology and Microbiology, ... the plant. Native species and provenances are normally adapted to local climate but responses to low temperature are of great importance when species or ecotypes are moved ... derived from Norstar winter wheat. Theor. Appl. Genet. 75, 480-484...

Ngày tải lên: 09/08/2014, 04:20