Báo cáo lâm nghiệp: "Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots" doc

... 763–772 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2003071 Original article Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots Christoph ... from the terminal root tip in all species. At 500 mm distance from the tip, periderm thickness had increased to 50 µm in beech and...

Ngày tải lên: 08/08/2014, 01:21

... between the extent of the damage and the individual characteristics of the experimental plots. e relation between the extent of the damage and the method of estab- lishment of the stands and degree ... years in the period until the next swarming; basing on the correlation between the extent of the damage and the individual character- ist...

Ngày tải lên: 07/08/2014, 03:22

... Ul- meto-Fraxinetum carpineum, Saliceto-Alnetum and Carpineto-Quercetum acerosum. As to the shrub and herb stratum, a great variety of species occurs there. In Ulmeto-Fraxinetum carpineum, ... 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 and fall traps l...

Ngày tải lên: 07/08/2014, 03:22

... evidence of the loss in the fir volume and the increase in beech volume was collected. – However, the increasing share of beech, accompa - nied by a decrease in the share of fir, is typical of the ... that the total rise in temperature in the immediate vicinity of the Carpathians and Tatras in the course of the current warming process is t...

Ngày tải lên: 07/08/2014, 03:22

... for the damage levels observed. To complete our under- standing of the effect of damage and consequently our under- standing of the effect of late frosts we need to carry out the same kind of “cohort ... decision to consider only the forks developed on the 1994 shoot of the main axis was in line with the aim of our study which was to determine and qua...

Ngày tải lên: 07/08/2014, 16:20

... 1987, and arranged in a randomised block design with four replicates. There were 2347 trees·ha –1 at the start of the experiment, and 25% of the standing biomass was harvested during the winter of ... according to Linder [25]. 2.5. Sugar and starch analysis Two pieces of bark from each tree were freeze-dried and ground into fine powder in a ballmill. The powd...

Ngày tải lên: 08/08/2014, 01:21

... thinning and fertilization, root pruning) and a control replicated three times in 15 m × 15 m plots. Age determination of trees growing in the same stand as the study trees indicated that the ... to contribute significantly to the variance of a spectra. The choice of r–1 degrees of freedom in the numerator of the F-ratio test instead of 2 was adopted t...

Ngày tải lên: 08/08/2014, 01:22

... unit) to determine the part of the respiratory chain affected by the phytotoxins present in these solutions. Working on isolated mito- chondria, like Moreland and Novitzky (1987), ... to follow the kinetics of oxygen consumption by excised roots in a liquid The next stage in these studies is the investigation of the microcosm (cell...

Ngày tải lên: 09/08/2014, 04:20

... Chemical thinning of blue spruce stands appears to be a viable technique of restoring these stands to their original tree species composition. However, care must be taken to avoid a significant increase ... crown top part of the stem and the thick branches. e decreased quality of the phloem (high water content) is probably the reason behind the increased...

Ngày tải lên: 07/08/2014, 03:22

... number of tree rings, the average ring width and the average standard deviation of the tree-ring series. MS and AC(1): the means sensitivity and the average first-order autocorrelation of the tree-ring ... (BAI) instead of the ring width. The basal area is defined as the area of the cross-section of a tree stem near the base, generally measured at breas...

Ngày tải lên: 08/08/2014, 00:22