Báo cáo lâm nghiệp: "Measurement of free shrinkage at the tissue level using an optical microscope with an immersion objective: results obtained for Douglas fir (Pseudotsuga menziesii) and spruce (Picea abies)" potx

... article Measurement of free shrinkage at the tissue level using a n optical microscope with an immersion objective: results obtained for Douglas fir (Pseudotsuga menziesii) and spruce (Picea abies) Patrick ... spite of the matter loss due to cutting (the ring width was approximately 7 mm for the two rings of Douglas fir and...

Ngày tải lên: 07/08/2014, 16:20

... S.C., PANDE P.K., 1989. Patterns of litter nutrient concentrations in some plantation ecosystems. Forest and Ecology Management, 29: 151–163. TSUTSUMI T., 1971. Accumulation and circulation of ... forest of Rajasthan, western India. erefore, the main objective of the present study is to quantify the nutrient content of aboveground biomass in a 10 years old stand of...

Ngày tải lên: 07/08/2014, 03:22

... of the studied stands. Water intercepted by the stand canopy of the sparse stand was vaporized faster than in the dense stand, the accumulation and consequen- tial conflux of water below the ... distribu- tion of precipitation. A linear relationship between the amount of rainfall on the open area and the amount of throughfall in the spruce stand was fou...

Ngày tải lên: 07/08/2014, 04:20

... virtue of these data from forest management plans the main factors of the forest management must be evaluated and the relations between the forest trans- port network and forest maintenance of ... borders of forest owners and spatial arrangement of the forest. at is why there are no problems with the forest condition evaluation (the borders of transport ar...

Ngày tải lên: 07/08/2014, 04:20

... June and July precipitation of the actual year is most significant for 100% of trees and for almost 80% of trees in this stand, and only for 10% or 5% of trees the precipitation in September and ... (7): 293–302 of climatic factors is significant for each stand. For most stands the precipitation in September and October of the previous year and espe...

Ngày tải lên: 07/08/2014, 10:21

... temperature and rainfall during the five years of study with Pearson correlation based on a significance level of 5% with the t test. The effect of age of the plantation on monthly mean annual ... can explain the adaptation of insects that feeds on endemic levels in native plants in reforestations areas of eucalyptus in Brazil [23, 24]. These native plants have c...

Ngày tải lên: 08/08/2014, 00:21

... higher availability of nutrients like Mg and K for the plant [18]. In the peat/composted pine bark substrate, the mixture of two organic components gives a high C:N relation and this could be the cause for the ... [36]. The quality of a substrate for conifer production is directly related with its water retention capacity and the porosity [18], and usually...

Ngày tải lên: 08/08/2014, 00:22

... significant level only for the MLR and the MNR (Tab. II; Figs. 4B, 4C, 5B and 5C). The Σ diameters, Σ lengths and Σ nodes of offspring shoots per parent shoot were lower for t.1 and t.2 than for the ... the other treatments of experiment 1 and lower for t.1 than for t.0 of experiment 2 (Fig. 6 and Tab. II). None of these sums was affected by the tr...

Ngày tải lên: 08/08/2014, 00:22

... influences the rate of electron transport by affecting photochemical and non-photochemical mechanisms. 2. MATERIALS AND METHODS 2.1. Plant material and growth conditions Before the initiation of aboveground ... force of electron transport to the reduction of the redox state of the primary electron acceptor of PS II, which is approximated by 1–q P . Figure 4 also il...

Ngày tải lên: 08/08/2014, 00:22

... tube and observe whether their width and the number of stomata change. In this way, the number of needles could allow us to have an idea of the organogenesis and the leaf biomass alloca- tion and ... greater air temperature variations, a qualitative and quantitative modification of the light transmit- ted through the tube wall, the permanently very high relat...

Ngày tải lên: 08/08/2014, 01:21