This study aims to investigate wood density at different levels of moisture, basic density and shrinkage of timber from Turkey oak （Quercus cerris L.） coppice forests growing in Central Italy. We also studied the va...This study aims to investigate wood density at different levels of moisture, basic density and shrinkage of timber from Turkey oak （Quercus cerris L.） coppice forests growing in Central Italy. We also studied the variability in density in the trees within and among sites. Density shows no significant statistical differences in the tested population. A higher variability in the shrinkage than in the density was found. Wood moisture is referred to as dry mass and fresh mass, which is related to many performance characteristics of wood, i.e., energy production. Trends in moisture and water content were studied because these physical parameters play an important role in the specific area of firewood which requires an accurate estimation of mass, volume and energy content. This work is a contribution to improve xylo-energy estimates of small and medium forestry issues.展开更多
This research was conducted to investigate about the causes of wildfires in three municipalities of the Tizi Ouzou and Bouira provinces, in Kabylia. Unknown forest fire causes account for 80% of total in Algeria, with...This research was conducted to investigate about the causes of wildfires in three municipalities of the Tizi Ouzou and Bouira provinces, in Kabylia. Unknown forest fire causes account for 80% of total in Algeria, with a peak of about 99% in Kabylia, the most forested region in the country but also the most severely affected by wildfires. The three study areas exhibit a rather high forestry ratio (40% on average) but also a very high population density, up to 300 people per km2, living in a multitude of small hamlets, near or inside the domanial forests and exerting an enormous pressure on them. Survey was carried out on people (N = 300) randomly selected in nine hamlets (thaddarth) through ad hoc questionnaires (134 possible replies) filled with face-to-face interviews. Factorial Correspondence Analysis was used to process data (300 × 134 replies in total). Fires result mainly voluntary (52.95%): pastoral fires to renew pastures (11.30%), political fires as security counter-terrorism measure (11.24%), uncontrolled garbage burning (6.83%). Negligent fires account for 41.79%: carelessly tossed cigarette butts (9.13%), agricultural works (burning of cut bush, stubble burning, 7.03%), restart of fire (6.83%) and forest activities in the forest (6.31%). Results depict a common core of fires due to the pressure on the domanial forests, on which traditional use of fire (pastoralism) and national security needs (counter-terrorism) dominate.展开更多
文摘This study aims to investigate wood density at different levels of moisture, basic density and shrinkage of timber from Turkey oak （Quercus cerris L.） coppice forests growing in Central Italy. We also studied the variability in density in the trees within and among sites. Density shows no significant statistical differences in the tested population. A higher variability in the shrinkage than in the density was found. Wood moisture is referred to as dry mass and fresh mass, which is related to many performance characteristics of wood, i.e., energy production. Trends in moisture and water content were studied because these physical parameters play an important role in the specific area of firewood which requires an accurate estimation of mass, volume and energy content. This work is a contribution to improve xylo-energy estimates of small and medium forestry issues.
文摘This research was conducted to investigate about the causes of wildfires in three municipalities of the Tizi Ouzou and Bouira provinces, in Kabylia. Unknown forest fire causes account for 80% of total in Algeria, with a peak of about 99% in Kabylia, the most forested region in the country but also the most severely affected by wildfires. The three study areas exhibit a rather high forestry ratio (40% on average) but also a very high population density, up to 300 people per km2, living in a multitude of small hamlets, near or inside the domanial forests and exerting an enormous pressure on them. Survey was carried out on people (N = 300) randomly selected in nine hamlets (thaddarth) through ad hoc questionnaires (134 possible replies) filled with face-to-face interviews. Factorial Correspondence Analysis was used to process data (300 × 134 replies in total). Fires result mainly voluntary (52.95%): pastoral fires to renew pastures (11.30%), political fires as security counter-terrorism measure (11.24%), uncontrolled garbage burning (6.83%). Negligent fires account for 41.79%: carelessly tossed cigarette butts (9.13%), agricultural works (burning of cut bush, stubble burning, 7.03%), restart of fire (6.83%) and forest activities in the forest (6.31%). Results depict a common core of fires due to the pressure on the domanial forests, on which traditional use of fire (pastoralism) and national security needs (counter-terrorism) dominate.
