Báo cáo lâm nghiệp: "Fire behaviour and severity in a maritime pine stand under differing fuel conditions" pdf

... species has traits allowing a fast rees- tablishment [47, 48]. Fire behaviour models offer an objective basis to evaluate, select and plan stand and fuel management practices aimed at safeguarding ... 537–544 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004048 Original article Fire behaviour and severity in a maritime pine stand under differing fuel condit...

Ngày tải lên: 08/08/2014, 01:22

... terminal bud and the desiccation of dis- tal nodes and internodes (dieback). The natural abscission of a shoot’s terminal bud means the death of both apical meristem and leaf primordia, usually ... second-year GUs of each plant. Cataphyll-bearing nodes at shoot bases were not considered as they are separated by very short intern- odes, so that their counting on standing plants is inac...

Ngày tải lên: 07/08/2014, 16:21

... coastal plain of the southeastern United States. We examined pine and hardwood (the primary competing vegetation) basal area and pine volume and foliar nutrient responses in a 2 × 2 factorial combination ... respectively. The maxi- mum and minimum pine and hardwood basal area growth for each treatment (check and fertilized alone) and year (two and four years after tr...

Ngày tải lên: 08/08/2014, 01:21

... between stands submitted to a traditional management since many centuries (i.e. coppice-with-standards treatment, stands intensively but infrequently disturbed) and stands recently converted into a ... fenced since 8 years to protect young trees from game damage. Within each included stand a temporary 400 m 2 quadrat was ran- domly placed at a minimum of 10 m away from forest roa...

Ngày tải lên: 08/08/2014, 00:21

... terrestrial ecosystems. To obtain viable estimates at the forest scale, it is advisable to begin at a local scale (forest stand) , and then to extrapolate the data using statistical analyses and pre-existing ... Version 5, S-plus 6.1 and Unistat 5.2 programmes were used for the statistical analyses. 2.5. Spatial analysis and cartography A carbon stock estimate was available at ea...

Ngày tải lên: 08/08/2014, 00:22

... Rosmarinus officinalis) and herbaceous plants (Lavandula latifolia, Sanguisorba minor, Argyrolobium zanonii, Bituminaria bituminosa, Aphyllanthes monspeliensis, Barlia robertiana, Rosa sp., Brachypodium ... years after outplanting at a fire-disturbed site of Rieucoulon (Hérault, France). ED analysis was examined on non-inoculated and Suillus collinitus-inoculated plants, and on natura...

Ngày tải lên: 08/08/2014, 01:22

... clearings, minimally 30 m inwards the forest. e forest clearings are covered mainly by rough reedgrass (Calamagrostis arundinacea) and shrubs like bird cherry (Padus racemosa) are growing ... humulinus, Dichrostigma flavipes, Phaeostigma notata, Panorpa communis and Panorpa germanica) is discussed. Keywords: Malaise traps; Neuroptera; Raphidioptera; Mecoptera; seasonal flight activity;...

Ngày tải lên: 07/08/2014, 03:22

... dominant stand and the volume of dead trees is not included in the calculation. Stand density was calcu- lated according to standard mensurational practice from the ratio of actual basal area ... potential and stability of mixed forest stands in uplands. A mixed beech/larch stand that was established by natural regeneration in 1934 to 1942 is assessed. e stand is situ...

Ngày tải lên: 07/08/2014, 03:22

... harmfulness. An “alder” biological form was studied in Alnus glutinosa and A. incana mainly in Polnička Forest District (Žďár region) and a “willow” form in Salix viminalis, S. triandra and S. caprea in ... bud- ding and the time of beetle invasion or due to heavy Table 1. Abundance of G. lineola imagoes at sweeping on A. glutinosa and A. incana (Polnička, 1996). e me...

Ngày tải lên: 07/08/2014, 03:22

... soil profi les applying the FAO WRB in- ternational classifi cation. Evaluation of underplanting damage  e degree of damage to underplantings was evaluated on each research plot, based on the ... ele- ments Al, S in damaged needles are another factor that negatively influences the health status of these underplantings. A statistical survey showed that damage to underplantings increased...

Ngày tải lên: 07/08/2014, 10:21