Báo cáo lâm nghiệp: "A change in structural diversity and regeneration processes of the spruce virgin forest in Nefcerka NNR (TANAP) in relation to altitude" docx

... difference in the index was confirmed in the spruce virgin forest in the altitudi- nal range of 1,300–1,400 m. e analysis of the structure of the spruce virgin forest in Nefcerka NNR assessed according ... Education of the Slovak Republic, Project No. 0082-06. A change in structural diversity and regeneration processes of the spr...

Ngày tải lên: 07/08/2014, 10:22

... with the expected composition, indicating that the peptide is of the correct sequence and free of contaminating pro- teins. Five cycles of N-terminal sequencing confirmed the expected residues including ... chromatogram obtained with UV absorption at 214 nm, the middle panel is the corresponding total ion-current after infusion into the mass spectrometer, and the bott...

Ngày tải lên: 18/02/2014, 13:20

... dioica and Aristolochia clematis as dominant species in the herb stratum. ere were two lines of traps led in a trees cropping mast oak forest, one line in a young oak stand, one in a spruce forest, ... out in 2002 to 2005. Small mammals were sampled using the standard method of line trapping by means of snap traps (P 1975) and combinations of snap a...

Ngày tải lên: 07/08/2014, 03:22

... to the in uence of bedrocks, rich in minerals containing these elements. Substantially lower are the contents in humus samples from the monitoring network (ca 3,000 points) in Finnish forests ... that the anoma- lous value of the median is caused by the high pol- lution and the presence of humus in the uppermost mineral horizon in the area of the...

Ngày tải lên: 07/08/2014, 10:21

Ngày tải lên: 07/08/2014, 16:20

... structure, the whole-stand model requires five stand-level inputs for simulation: the age of the stand at the beginning and the end of the projection interval, and the initial dominant height, number of ... data comprises the inventories carried out in 1995, 1998, and 2004 and on the date of the thinning operations. In addition, data from the first and...

Ngày tải lên: 07/08/2014, 16:21

... disturbance in the 1980s, 1950s, and 1880s. In the oldest portion of the chronology the number of trees showing release was low, but this was mainly an arti- fact of the drop in sampling depth after the ... prior to the 1980s, forest inventory records from the study area were infrequent and of insufficient detail to record localized damage from infrequent...

Ngày tải lên: 07/08/2014, 16:21

... proportion of certain type of wood within a ring). The within-ring variation is the most significant source of wood variation, and wood uniformity is one of the main requirements by the processing industry ... starts in spring and stops at the end of summer or at the beginning of autumn. During the active period, the cambium produces a number of xylem cells...

Ngày tải lên: 08/08/2014, 00:21

... effect of thinning must include the thinning intensity, the stand age at the time of thinning and the time since thinning [17, 25, 39, 61]. In this work, to consider the thinning effect, the term proposed ... Effect of thinning in height-diameter relationship In the study of the effect of thinning in h-d relationship, a new dummy variable to test if the...

Ngày tải lên: 08/08/2014, 00:22

... diameters. The variable is close to one in rather uneven stands and approaches to zero in homogeneous stands. The logarithm of the maximum value of Ele-6 and 1 was used to express the trend seen in the ... METHODS 2.1. Inventory plots The modelling data comprised inventory data of forest stands, on one hand, and fire occurrence data, on the other hand....

Ngày tải lên: 08/08/2014, 00:22