Báo cáo lâm nghiệp: " Biomass and composition of understory vegetation and the forest floor carbon stock across Siberian larch and mountain birch chronosequences in Iceland" docx

... the dominance of dicots in the ground flora of the birch forests (Fig. 4). 3.7. Carbon stocks of the forest floor Changes in plant growth forms altered the relationship between C -stock and forest ... DISCUSSION 4.1. Effects of afforestation on the ground vegetation biomass and composition Both larch and the native birch caused a decline...

Ngày tải lên: 08/08/2014, 00:22

... At the first place the covering of the northern slope of the outside spoil bank of the Bełchatów brown coal mine consisted of the follow- ing formations: sands (loose and coarse), medium sands ... years since the beginning of reclamation of the northern slopes of the outside spoil bank of the Bełchatów brown coal mine by reforestation there have been f...

Ngày tải lên: 07/08/2014, 03:22

... they are declining due to the ever-increasing demand for timber and to the need of agriculturally suitable land [61]. In the Yungas, an example of an indigenous tree used for firewood, pulp, and ... the possibility of the occurrence of other kinds of mycorrhizal associations in the species examined, an absolute dominance of AM was observed in these plants. The...

Ngày tải lên: 07/08/2014, 16:21

... from the end of the preceding growing season (1994) to the beginning of the current one. In comparing the carbon balance to biomass increment, we assumed that carbon uptake during the growing Figure ... compare the biomass incre- ments and carbon balances of the study trees. 2. MATERIALS AND METHODS 2.1. Site The study was conducted in the state f...

Ngày tải lên: 08/08/2014, 01:22

... stand than in the Italian stands. N, Ca and Mg recycled in the same proportion in all stands. In contrast, twice as much P and K was recycled in the Italian stands ... of the Massif Central in the Cevennes mountains, about 100 km north of Montpellier. Although there were few climatic differences and the elevations of the...

Ngày tải lên: 08/08/2014, 18:21

Ngày tải lên: 07/08/2014, 03:22

... concerns all mountain forests, in- cluding the area of the Beskidy Mts. (Beskid Śląski in the northern, Beskid Żywiecki in the southern part of the area described in this paper), located in the western ... almost the whole area of the West- ern Beskidy region. Along with the increase of the size of salvage cuttings (including the removal of in-...

Ngày tải lên: 07/08/2014, 03:22

... Academy of Sciences of the Czech Republic, Grant No. A600870701, and by the Ministry of Education, Youth and Sports of the Czech Republic, Projects No. 2B6068 and MSM 6215648902, and by the Governmental ... RESULTS AND DISCUSSION At the end of growing season 2002, the mean tree height and stem diameter (at one tenth of tree height above the ground) w...

Ngày tải lên: 07/08/2014, 03:22

... main tree species, the input data being the tree diameter and height, quality of the bottom third of the stem (A, B, C), stem damage (yes, no), and in the case of the beech also the age and ... upon the decision of the Ministry of Agriculture from July 1, 2004. It was performed on all lands covered by forest tree species, i.e. on forest lands and...

Ngày tải lên: 07/08/2014, 04:20

... change the species composition of the biocenosis favouring the survival of the most xerophytic species, Q. pubescens, and the reduction in number of individuals of Q. cerris and Q. frainetto ... areas in the Southern Hemi- sphere, e.g. New Zealand, Chile and Australia [56], and in the Northern Hemisphere, e.g. Northeast of the USA [158], East of Chi...

Ngày tải lên: 07/08/2014, 16:20