Báo cáo lâm nghiệp: "Coarse woody debris carbon stocks in natural spruce forests of Babia hora" potx

... volume of the log in m 3 , h – length of the log in m, g 1/2 – cross-sectional area at ½ length of the log in m 2 . Total volume of coarse woody debris was given as a sum of the volumes of standing ... 2010 (9): 397–405 Coarse woody debris carbon stocks in natural spruce forests of Babia hora K. M 1,2 , J. M 1,2 1 Department of Fo...

Ngày tải lên: 07/08/2014, 10:21

... and the incompleteness of knowledge of their ecology and feeding behaviour have lead us to initiation of an extensive research focused on monitoring the population dynamics of rodents in forest ... methodology of dealing with problematic situations. Most of the foresters are uninterested in small mammals and many have only very smat- tering knowledge of the dangerousnes...

Ngày tải lên: 07/08/2014, 03:22

... level of spermidine (M et al. 1999). A high level of putrescine was determined in the pro-embryogenic tissue of Picea rubens, while spermidine was predominant during the stages of embryo ... respon- sive hurst ecotype of Norway spruce. Contents of free polyamines (putrescine, spermi- dine, and spermine) were determined in different developmental stages of Norway...

Ngày tải lên: 07/08/2014, 10:21

... [26], inoculating the same fungal isolates in large trees and seedlings, found that seedling inoculation could be a reliable way of determining the virulence of bark beetle- associated blue-stain ... mortality in Scots pine domi- nated forests, where T. piniperda adults may feed on the stems of young Scots pine seedlings. This study confirms the results of earlier inoculation stud...

Ngày tải lên: 07/08/2014, 16:20

... contents in spruce needles. The results of this work are in accordance with previous cytokinin measurements in declin- ing spruce trees which also revealed higher levels of cytokinin ribosides in combination ... reduction in the rate of metabolisation of isopentenlyadenosine. We assume that the increased cytokinin levels in shoots of stressed seedlings could in add...

Ngày tải lên: 08/08/2014, 00:22

... to induce hardening (see below). 2.2. Hardening regimes The timing of growth cessation, which marks the onset of cold hard- ening [17], was determined using a set of three replicate plants of ... clones also indicated that the timing of onset and the inherent rate of hardening were independently inherited traits. None of the clones exhibited the desirable late-and-rapidly harden...

Ngày tải lên: 08/08/2014, 01:21

... spring. In spring, the upper threshold of stagnant moisture was in a soil depth of 70 to 90 cm in the healthy stand, but in 40 to 60 cm depth of the declin- ing ... for the declining stand (end of September). At the beginning of the dry period, the decrease in soil matric potentials was steeper in the declining stand in both 1...

Ngày tải lên: 08/08/2014, 18:21

... D 1 1 Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China 2 Graduate University of Chinese Academy of Sciences, Beijing, P.R. China ABSTRACT: Changbai Mountain Natural ... and model simulating of main species in various forest vegetations of Changbai Mountains, China. Acta Ecologica Sinica, 26: 1037–1046. H S.C., P D.A. (1995): Transferri...

Ngày tải lên: 07/08/2014, 10:21

... ef- ficient, supply an increasing range of products, and maintain a high standard of sustainability. The guiding principles for achieving these goals in the Australian context are set out in documents ... varia- tion in the price obtained for wood chips. Increasing the price obtained for woodchips increased the correlated response by decreasing the relative value of carbon revenu...

Ngày tải lên: 07/08/2014, 16:20

... 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 6. Net assimilation ... evaluation of the carbon budget of trees was intention- ally considered for a one-year period comprising the current growing season (1995) and the period of time extending...

Ngày tải lên: 08/08/2014, 01:22