Báo cáo lâm nghiệp: "Production potential and ecological stability of mixed forest stands in uplands – VI A beech/larch stand on a mesotrophic site of the Křtiny Training Forest Enterprise" pot

... dominant stand and the volume of dead trees is not included in the calculation. Stand density was calcu- lated according to standard mensurational practice from the ratio of actual basal area ... is the 6 th report on the production potential and stability of mixed forest stands in uplands. A mixed beech/larch stand that was established by...

Ngày tải lên: 07/08/2014, 03:22

... Forata and Benissa). In 199 4–1 995, rainfall was around 60% of the historical annual average, whereas in 1993, rainfall was close to historical values in six sites (Ayora, Buñol, Martés M and ... Ecosistemas Agroforestales, EPS Gand a, Universidad Politécnica de Valencia, Ctra Nazaret-Oliva s/n, 46730 Gand a, Valencia, Spain c Departament d’Ecologia, Universitat d’Alacant, A...

Ngày tải lên: 08/08/2014, 00:22

... evaluated stands are given in Tables 5 to 10. Remarkable production parameters of Douglas Table 4. Characteristics of experimental stands Stand Stand part Age as on 1. 1. 2007 Management set of ... class, again three stands were assessed in MSS 25 and six stands in MSS 45. e oldest group (over 101 years) consists of the set of four stands in MSS 25 and...

Ngày tải lên: 07/08/2014, 03:22

... values of base saturation fall below 5% in 25% of the evaluated plots.  ese values can already be considered as extreme and the applica- tion of remediation ameliorative actions (fertiliza- tion, ... in or- ganomineral horizons there is a moderate increase to the values of 6–2 0% compared to humifi cation horizons (Table 2). From the aspect of sorption sat- ura...

Ngày tải lên: 07/08/2014, 10:21

... and standard deviation (SD) of canopy height, number of stems and basal area for the 900 1-m 2 sampling points of the study plot, and mean and standard deviation of the height, projected area, thickness ... under traditional management and high when woodlands are abandoned (results from 40 0–2 700 sampling plots in the Spanish provinces of Madrid, Cádiz, Málaga...

Ngày tải lên: 07/08/2014, 16:20

... heartwood, Janin and Clément [10] raised the concept of a hinge-ring that acts as a barrier between sapwood and heartwood rings: on the sapwood side and especially near the cambial zone, resorption of the ... contained measurable amounts of mineral inclusions which were quantified using image analysis. Based on the variations of mineral content observed between...

Ngày tải lên: 07/08/2014, 16:20

... similarity in frost resistance of expanding current-year needles of the Canary Island pine and subalpine evergreen timberline conifers of continental Europe suggest that frost hardening during ... the onset of frost damage. In Figure 4. Recuperation capacity of P. canariensis seedlings after a frost treatment of (a) only the above ground parts and (b) of the wh...

Ngày tải lên: 07/08/2014, 16:20

... cork oak areas in Spain (Fig. 1): the Natural Park of “Los Alcornocales” in the South and Catalonia in the North-East. The characteristics of both areas are summarized in Table I. In each of these ... Catalonia, pos- sibly because of the small number of trees sampled in this quality class. The analysis of the variability of the modelling efficiency...

Ngày tải lên: 08/08/2014, 00:22

... linked to a far larger decrease of the standing volume of trees (and thus carbon) in the forests and of soil carbon because of the harvesting, an effect that is compensated only very slowly by the ... of the forest. Understanding the linkage between forest carbon pools and flows and the building carbon pools and flows in detail is an urgent research...

Ngày tải lên: 08/08/2014, 00:22

... (plots and linear regression) and southern France (mean, standard deviation and confidence interval of the mean), and for the saplings of natural regeneration (plots and linear regression) at 5 ... France (plots and linear regression) and in southern France (mean, standard deviation and confidence interval of the mean), and for the natural regeneration (plots...

Ngày tải lên: 08/08/2014, 00:22