Browse

Forest plays a multifaceted role, which is determined by its economic, ecological and social values; therefore, sustainable forestry development has to ensure a balanced use of all the values. For the first time in Latvia, the situation in hunting management was analysed, assessing the level of safety and traumatism. The research aim is to assess safety in the process of hunting and the real situation in Latvia. The research found that the most dangerous kinds of hunting were hound hunting and waterbird hunting du...

The contribution is focused on problematics of the impact of weather conditions to the phenological phases of broadleaved trees (Quercus robur L., Fagus sylvatica L., Tilia cordata Mill., Prunus spinosa L.) at the selected research areas in central Slovakia. There were recorded a 10% incidence of falling and yellowing leaves on a group of ten trees selected species. Factors taken in account were rainfall data, the number of tropical days and the length of growing season (June пїЅ August). The significant differenc...

The article is devoted to the improvement of circular saw machines with pneumatic drive of cutting mechanism. Currently, circular saws are widely used for producing of sawn timber because they have high productivity. The drive of saw blades more often is carried out by electric motors through additional transmission (gear, belt, etc.). In the recent literature are offered technical solutions, in which as a drive of circular saws provided by using of pneumatic. Energy source interacts with the circular saw will all...

The research studied the influence of the volume and construction of пїЅHikoпїЅ and пїЅPlantekпїЅ containers on acorn germination, resistance of root-closing substrate, height of aboveground plant parts and length of root systems of oak seedlings. The cell volume in пїЅHikoпїЅ containers varied from 25 cm3 to 530 cm3 while in пїЅPlantekпїЅ containers пїЅ 115 cm3 пїЅ 275 cm3. The seedlings were grown in greenhouses of arch type with polycarbonate coating and automatic watering. Peat-moss was used as a substrate. Av...

Silver birch is economically important tree species in Latvia. Currently most of clearcuts in stands of this tree species are regenerated naturally, however, there is an increasing demand of birch plants. Around 5 mil. plants are produced in Latvia annualy, exceeding the amounts in other countries in the region. With a goal to intensity the forest management, while propagating only the best genotypes and reducing initial spacing in order to ensure large radial increment, recently testing of vegetatively propagated...

In this study the intra-site variations in climatic signal observed in tree rings of larch from the Polish Carpathian Mountains were analyzed. To identify the differences between tree-ring growth of particular trees within each of analyzed sites, the descriptive analysis, visualizations, Factor Analysis (FA), Principal Component Analysis (PCA) and Independent Component Analysis were used. For evaluating observed differences the clustering methods (k-mean, EM, c-mean, Kohonen Artificial Neural Network) with ANOVA a...

Currently, in connection with the deterioration of the environmental conditions, the per-son experiences daily stress. There is a growing need to improve the immu-Niceta people in vitamins, microelements and biologically active substances. Traditional means of im-mune support due to the low efficiency pale into insignificance. Therefore, growing de-mand for environmentally safe products medicinal plant with a high content of vitamins and biologists-cally active substances such as Panax ginseng. Ginseng is known to...

In this article we consider the opportunity of the use of tree-ring ?13C carbon isotope composition records for detecting and recognizing changes in forest ecosystems in the south of the West Siberian Plain where the growth conditions for conifer trees are generally optimal. Trees grow in the closed stands. The wood of Larix sibirica and Pinus sylvestris trees was chosen as object of our research. The values of carbon isotope composition (?13?) were measured in tree ring cellulose and lignin of Larix sibirica and ...

Protected natural areas are ideal for monitoring relatively undisturbed natural development of both inorganic and organic parts of ecosystem. The stock-taking of species occurring in the nature reserve is not only crucial to maintain the function of natural reserve, but also to monitor the development of species spectrum, as well as the diversity and succession under conditions relatively undisturbed by anthropogenic factors. Prosisko nature reserve was established in 1998 in order to protect forest ecosystems wit...

To combat climate change increase in carbon sink or forest cover is most important adaptation technique. India has committed to create additional carbon sink of 2.5 to 3 billion tonnes of CO2 equivalent by 2030 in Intended Nationally Determined Contribution (INDC) submitted to Paris meet COP 21 (Conference Of Parties). A IPCC Tier II analysis of different mangrove sites of India will give a better snapshot of role of mangrove cover as carbon sinks to combat climate change and to achieve national target of carbon s...

Every year wildfires during the dry and hot summer season cause serious damage in agro-forest systems in Mediterranean area. Preventive measures are the most important issue in order to ensure agricultural production and sustainable tourism. One of preventive measures is planting of vegetation fire protection belts by using a low flammable plant species. Among low flammable plant species carob tree (Ceratonia siliqua L., family of Fabaceae, subfamily of Caesalpinioideae) have special position. The carob tree grows...

In our paper we deal with the evaluation and comparison of precipitation totals and interception in living and dead climax spruce stands at a research plot of ?ervenec during the non-vegetation periods (from approximately October to May) in the years 2012 - 2016. The difference in interception was analysed from October 2012 because during the summer 2012 the forests in the area died due to the infestation by the spruce bark beetle (Ips typographus). The research site is located in the Western Tatras (Slovakia) in ...

The research aim is to estimate the profit a forest owner can earn per full forest rotation cycle from forest stands of dominant coniferous species in Latvia, selling both the assortment of logs and biomass (BM) from final felling. The research analysed the situation in privately managed forests, composed of the coniferous species пїЅ Norway spruce (Picea abies L.) and Scots pine (Pinus syllvestris L.) пїЅ in different forest types in Latvia. The calculation of revenue from forest product sales took into account b...

The research aim is to identify a financial gain a forest owner can make from the management of a deciduous forest stand in Latvia provided that the stand is logged at the final (clear) felling age and the revenue is earned selling the wood as roundwood assortments and residue biomass or only as biomass (BM). The present research analysed the situation with forests owned by natural persons of the Republic of Latvia and identified the amounts of revenue a forest owner can earn growing deciduous пїЅ birch, black ald...

The forest is generally recognized as a major environmental and stabilizing factor in the country. Its stability is currently significantly influenced by changing climatic conditions. They are an important factor in a determining species composition of forest ecosystems, as well as ecophysiological and production processes directly linked to the overall performance and stability of forest stands. Dry summer months and warmer winters with negative anthropogenic activities actually create more favorable conditions f...

In this paper we will describe a novel approach for forest management that includes remote sensing based monitoring, simulation and planning. When we think about sustainable forest management, it is important to know the vital facts about the forest, especially the annual increment of the timber volume for each forestry unit. A terrestrial census could deliver the required information, but it is too expensive to be carried out frequently. The alternative is a census based on remote sensing data. In this area we ob...

One of the main factors influencing the accuracy of the obtained lumber is the rigidity and stability of saws. In the process of sawing woodcutting tools heated. This phenomenon can cause a loss of rigidity and stability of saws. A log frames and band saws negative influence of heating can be compensated the additional tension and setting directing. Particular importance is the heating of circular saws due to the appearance of a temperature gradient along the radius in the process of sawing wood. Upon reaching the...

Growing a healthy, stable and quality forest stands while using their products in the most effective way possible is the primary aim of every forest manager, as well as the forestпїЅs owner, considering the fact that wood mass is still the most important source of income for the forest management in Slovakia. As a result of wood logging and conversion, a significant amount of waste wood mass is left over in the forest, manipulation sites, wood stocks, warehouses and saw pits. The waste wood, consisting of pieces o...

Because wood ash resulted from furnace facilities destined to solve the problem of wood debris, are cumulated in large amounts, the problem of an alternative to their storage is increasingly important. A using possibility, if free of harmful constituents, is their administration as soil fertilizer/amendment may be taken into consideration. This experiment was conducted in order to emphasize the effect of using ash resulted from oak debris burning in facilities destined to this aim, as soil fertilizer, administered...

In general, there is no natural soil surface that would not be threatened by water erosion. However, a number of methods that estimate the erosive soil risk incorrectly exclude forests and flat agricultural land from the category of areas vulnerable to water erosion. Forests are known for their soil protection functions, when a dense tree canopy interrupts precipitation and decreases the kinetic energy of water drops falling on the soil surface. Moreover, the top organic soil layer in forests has a very good infil...

The article presents the evaluation of the stability of vegetation in forest ecosystems, in places of mass rest in the woods on a lake in the littoral zone of pine forests of the Mari El Republic. Studies have shown that the amount of coniferous undergrowth ranges from 0.016 thousand PCs/ha to 0,104 thousand pieces/ha, and does not provide the initial stage of the formation of dark coniferous young growths. For deciduous species, mainly birch, in some cases, aspen is characterized by intensive growth, which preven...

In a forest ecosystem pine plantations, the National Park lower Kama Natural expansion of the path network and Parking areas, is characterized by an increase of stages of digression that slows down all the process of development of components of forest natural complexes. With the increase in recreational forest use and loads increases the number of trees with mechanical damage. Traumatized trees colonized by pests and diseases. There is a decrease in the number of healthy trees and an increasing number of worst . ...

The article shows methodology and principles of the system monitoring and integrated assessment of forestlands on the basis of the submission of such lands as a source of biological resources (including wood) and also as environment-forming and social functions source. Systematic monitoring of forestland is expressed in observations, assessment (in physical indicators) and prediction of all its natural resources potential. Scientific principles for a comprehensive assessment of forestlands include justification fo...

Forest resource is the most important natural resource. The Leningrad Region is one of the most developed subjects of the Russian Federation according to economic indicators. Logging, wood processing and timber exports are carried out in the region due to the reserves of forest resources. The consumption of forest resources should not exceed the productive natural forces. Improving forest management, ensuring rational use of forests, maintaining the ecological potential of the forest fund are essential aims. The s...

For unused agricultural land afforestation are several aims like, rational land use, rural landscape diversification, decrement of environment pollution, increasing recreation possibilities and other but also can be established or special purposes planted forest stands as plantation forest. In Latvia during year 2015 State Forest Service (VMD) registered 3.4 thou. ha of afforested agricultural land and 2.7 thou. ha were registered as plantation forests. Aim of research is to analyse sanitary condition of agricultu...

Croatian territory is located at the transition region of Southeast Europe and the Mediterranean. Stretching through this area, Croatian territory is increasingly affecting dry periods affecting Europe. The task of this study was to perform analysis of ecosystems using MODIS products. Due to the large amount of data work was created using GIS tools for ease of reference in the data. The paper detailing the purpose and process of making it would be easier to interpret. Conclusions contribute to a better understandi...

Association Quercetum trojanae dukagjini in Kosovo as relict and refugial phytocoenosis is preserved only in some specific localities: near Pashtrik, Koritnik, Oshlak and some individuals in complex of Carralevas Mountains near Theranda. The altitude of these grounds is from 300 to 900 m (1000 m). Geological composition is made of limestone rocks. The pedological cover is red earth (terra rosa). The phytocenosis is under the Mediterranean climate, which comes through the valley of the Drini i Bardh\"e River. Phyto...

The anthropic intervention is strongly felt in T\^argoviЕџte Plain. Here, man has turned most of the forest into land for agriculture, constructions, ways of communication, etc. In the past, in T\^argoviЕџte Plain, oak forests thrived because of the favorable conditions provided by the water-bearing structures situated near the surface and by the plain relief. Today, the forests of T\^argoviЕџte Plain represent nothing else but the remains of the old forest, where the wood vegetation finds however good recovery co...