Báo cáo lâm nghiệp: "Assessing the short rotation woody biom

Báo cáo lâm nghiệp: "Assessing the short rotation woody biomass production on marginal post-mining areas" doc

... Supported by the Federal Ministry of Food, Agriculture and Consumer Protection and by the Vattenfall Europe Min- ing AG. Assessing the short rotation woody biomass production on marginal post-mining ... supported by the fact that the hedgerows result in higher crop yields compared with conventional agriculture. Regardless of the economic assessment of the prod...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Assessing the nutritional and climatic response of temperate tree species in the Vosges Mountains" doc

... this does not modify their ecological optimum, but reduces the ecological interpretation and the projected dispersion on the CCA axes. On the other Table IV. Akaike Information criteria (AIC) of ... efficiency of the ecological variables used in E for predicting the composition of the vegetation. The closer the eigenvalues of the m first axes of CCA are to the m firs...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils" doc

... and the slow decomposition kinetic of the litter [13, 25]. Indeed, our results revealed the strong effect of the Norway spruce density on the spontaneous regeneration (Tab. II). The plantation ... seedlings. The spatial heterogeneity of the woody regeneration was rather similar in coniferous and deciduous stands. We conclude that for the development of multifunctional fo...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Occurrence of Ips duplicatus (Coleoptera: Curculionidae, Scolytinae) on pines (Pinus sp.) in the Czech Republic and southern Poland – Short Communication" pdf

... abundances on pines. Feeding outsets were found on the edge of pine branches; afterwards they were also found on living pine stems in diﬀerent parishes where the pine predominated. Most of the trees ... inciden- tally on pine in Central Europe, in the old range of its occurrence. Most probably, it still concerns only a chance occurrence in new localities with very high...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "About the benefits of poststratification in forest inventories" potx

... compares the square root of the means of the estimates s 2 y st.post.uncond for the conditional variance (1), the means of s 2 y st.post.cond as estimates for the unconditional variance ... small connected subareas. e larger connected subareas are the less is the gain in precision. e conditional as well as the unconditional variance estimator for poststratiﬁe...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Influence of pulverized limestone and amphibolite mixture on the growth performance of Alnus incana (L.) Moench plantation on an acidified mountain site" potx

... 1990; V et al. 2003). On the one hand, the requirement to convert the allochthonous blue spruce stands as well as the need to reﬁll the gaps after failed plantations is a diﬃcult task in ... the conversion of blue spruce stands even under environmentally highly stressing conditions, (2) to assess the foliar nutrient status of the alder as a precondition of positive...

Ngày tải lên : 07/08/2014, 04:20

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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

... vector deﬁnes the stable diameter 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 ... distribution. Condition (C3), to- gether with conditions (C1) and (C2), deﬁne the harvesting strategy for the model, and are formulated as follows: (C1) A necessary condition...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: "Eﬀect of an oil heat treatment on the leachability and biological resistance of boric acid impregnated wood" pps

... varying by their drying properties and therefore permeability of their dry ﬁlm are compared as boron retention agent. The impact of these combinations is evaluated for boron retention and biological ... drying and consequently regarding boron leaching. Except a small increase of retention for wood treated with a 1.0% boric acid solution, boron concentration has no impact on amount of bo...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: "Predicting the vertical location of branches along Atlas cedar stem (Cedrus atlantica Manetti) in relation to annual shoot length" pdf

... inﬂuences more the occurrence and the length of the zones than the axes composition of each zone. The length of every zone was modeled as a function of the length of the whole annual shoot. These parameters ... distribution of events as a function of the position make it possible to evaluate the dynamics of the phenomenon studied, such as the locations of the main tr...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: "Optimising the management of even-aged Pinus sylvestris L. stands in Galicia, north-western Spain" ppt

... have shorter rotation lengths. Secondly, the higher is the number of trees per hectare the longer are the optimal rotation lengths. Thirdly, increasing discounting rate shortens optimal rotation ... employed to compute the intensity of thinnings along the rotation of the stands. The graphs obtained (Fig. 9) show that the thinning intensity depends on the number o...

Ngày tải lên : 07/08/2014, 16:21

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