Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen

Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China" pptx

... primary productivity in ter- restrial ecosystems (J et al. 1999), N miner- Moisture eﬀect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China G. Q 1,2 , Q. ... is maintained at 20°C. For the given vegetation type of Changbai Mountain, soil C and N mineralization rate, potential mineralizable C (C 0 ) and potential ra...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Modelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.)" pptx

... stratums according to altitude. The recognition of these problems in such wide areas, and the increasing interest in using these stands for either direct production (such as wine barrels) or indirect ... constraints, which may endanger the existence of these stands in the long term. In Spain, 50% of the total surface area of this Mediter- ranean oak can be found in the reg...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Estimating the sustainable harvesting and the stable diameter distribution of European beech with projection matrix models" pdf

... distribution and, consequently, the long-term dynamics of the non harvested populations. On the other hand, and assuming that condition (C1) holds, conditions (C2) and (C3) can be rewritten by means of ... following condition (C3), which leads to reach in each harvest the proportions of stems/ha in each class corresponding to the stable diameter distribution. Condition (C3),...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp:" Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris" potx

... characteristics, and nitrogen and carbon contents (average ± SE) in relation to needle age in the fertile (A) and the infertile (B) site, and the statistical significance of the effects of age and integrated ... biomass investment in branches in low light. However, in our study, there was an increase in the fractional investment in needles with increasing Q int...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: " Growth, mineral nutrient content and nitrogen metabo- ism in Laccaria laccata-inoculated and non-inoculated Douglas fir seedlings during their growth period" docx

... combined with a higher proline amount in non-inoculated Douglas fir characterized seedlings in stress-induc- ing situations. AAT is often considered as an indicator of physiological ... im- proving growth of various conifers (Le Tacon and Bouchard, 1986). The investigations described herein were carried out to obtain information on physiologica...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx

... 0.76 – C-HS – carbon contined in humus acid, C-HA – carbon contained in humic acid, C-FA – carbon contained in fulvic acid 204 J. FOR. SCI., 56, 2010 (5): 195–208 changeable cations of agricultural ... according to characteristic absorbances in pyrophos- phate. Carbon contained in humic acids (hereinafter C-HA) and carbon contained in fulvic acids (hereinafter C...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "The effect of liming on the mineral nutrition of the mountain Norway spruce (Picea abies L.) forest" docx

... eﬀect of liming on the carbon and nitrogen nutrition of the spruce stand was determined. The content of calcium, magnesium and phos- phorus in current needles during dormancy was always higher on ... the study of the production and health state of stands and for the assessment of reclamation measures in forest stands. Carbon content in current needles d...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp:"Net effect of competing vegetation on selected environmental conditions and performance of four spruce seedling stock sizes after eight years in Québec (Canada)" ppsx

... used in this study allowed an evaluation of the net benefit of planting larger seedlings in two contrasting competing environments, for the purpose of selecting an “optimum” seedling size in relation ... temperature during the first days in spring and early summer at site 3 . This is explained by the nature of the non-crop vegetation cover and local climatic conditions. In...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "The effect of excess nitrogen and of insect defoliation on the frost hardiness of bark tissue of adult oaks" pot

... hardiness of living bark tissue from adult oaks was tested in two sets of investigations: i) in trees differing in leaf nitrogen concentrations, and ii) in nondefoliated ... in northern Germany. In earlier investigations, a majority of oak stands had shown high leaf nitrogen concentrations. Therefore, the effect of nitrogen status...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "The effect of nitrogen content on the of Scots pine needles and shoots photosynthesis" doc

... density decreased with increasing nitrogen content (Fig. 4) and the needle angle increa- sed with increasing nitrogen content (Fig. 5). In conclusion, nitrogen content can increase shoot ... mineral nutrition on carbon dioxide exchange and parti- tioning of carbon in trees. In: Nutrition of Plan- tation Forests. (Bowen G.D. & Nambia...

Ngày tải lên : 09/08/2014, 04:20

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