The article presents the results of a complex assessment of land resources in the western part of Krasnoyarsk Krai (Prichulymye). The characteristics of the national land reserves, productivity, soil properties, their morphological and chemical properties are given depending on the landscape features of the territory. Natural and climatic conditions are diverse, which is due to the peculiarities of the geographical location at the junction of various natural zones from taiga, subtaiga to island forest-steppes and steppes. The study area is characterized by a significant diversity of relief and is located in three physical-geographical parts: most of the Central Siberian Plateau, the eastern part of the West Siberian Lowland and the foothills of the Altai-Sayan mountainous country. The assessment of soil and vegetation cover is given depending on the geographical location and its influence on the productivity and economic activities of people. Each soil zone is characterized by the complexity and diversity of the bud cover, which is associated with a complex combination of soil formation factors. The general features of soil formation conditions are: a shortened period of active biogeochemical processes; the uniqueness of the thermal regime - sharp fluctuations in temperature throughout the season, year and day; the influence of a cold, long-seasonally frozen horizon; the uniqueness of the hydrological regime, which is associated with the slowly thawing permafrost horizon; the influence of this horizon on the dynamics of nutrients in individual phases of plant development. Chernozems are the most fertile and agriculturally developed. Based on the above studies, it has been established that the possibilities of human impact on the soil are increasing every year. They are not limited only to agricultural production, but are also associated with the expansion of the area of open-pit coal mining, which means more soil will be destroyed and covered with overburden. State district power stations, plants, factories, thousands of cars and tractors emit gases, soot, dust, which to one degree or another affect soil processes. Large areas of land near construction sites, along roads, near field camps remain unused and are subject to destruction. Thus, solving problems related to soil protection and its rational use is a very urgent task.

The relevance of the work is due to the high need for a theoretical justification for optimizing the range of urban green spaces and technologies for their creation. The aim of the research is to establish the pigment composition of the needles of the Platycladus orientalis or Oriental thuja (Platycladus orientalis (L.) Franco) when introduced into the conditions of the Nizhny Novgorod region (Russia) and the Almaty region (Kazakhstan). The object of the study was 1-year-old needles of biota harvested at the collection sites of Nizhny Novgorod State Agrotechnological University (Nizhny Novgorod, Russia) and Kazakh National Agrarian Research University (Almaty, Kazakhstan). The geographical coordinates of the locations are 56°14'30" N, 43°57'16" E and 43°14'31" N, 76°57'7" E, the absolute height is 141 m and 872 m, respectively. The methodological approach assumed compliance with the principle of the only logical difference and the requirements for typicality, suitability, reliability, optimality and expediency of the experience. The methodology is based on field and laboratory studies. The content of chlorophyll-a, chlorophyll-b and carotenoids was detected with a SF-2000 spectrophotometer with GRASS GIS 7.6.1 / QGIS 3.4 software. It was used to record absorption maxima for the above pigments at wavelengths: 665 nm, 649 nm, 452.5 nm. The heterogeneity of the pigment composition of the leaf apparatus of the accounting plants was recorded for all the tested indicators. The differences were noted both between the compared experimental sites and at the level of individual phenotypic variability within the boundaries of each of them. The average values of chlorophyll-a content were established, which ranged from 0.70±0.024 mg/g to 0.92±0.028 mg/g (Russian location) and from 0.86±0.017 mg/g to 0.95±0.042 mg/g (Kazakhstan location). The presence of chlorophyll-b in the conifers of plants in the surveyed areas was determined: from 0.35±0.018 mg/g to 0.71±0.081 mg/g in the Russian location and from 1.13±0.082 mg/g to 1.53±0.085 mg/g (tree 4) in Kazakhstan. The presence of carotenoids was detected: from 0.32±0.008 mg/g to 0.37±0.012 mg/g and from 0.24±0.021 mg/g to 0.38±0.032 mg/g in the Russian and Kazakh locations, respectively.

The question of the possible effect of adding an additional amount of nitrogen to the litter on the decomposition rate of forest litter is considered. An integral model is proposed in the form of a target functional of variational optimization, which is optimized and it has been shown that the average integral value of lignin, having a positive correlation with the specified volume of nitrogen, can lead to a decrease in the decomposition rate of the litter to a minimum. The transition through the minimum points at the same time indicates additional possibilities of the constructed model to cover also the results of the opposite nature, when there is an increase in the decomposition rate.

The article presents the results of a study of the dependence of the diameter of the Daurian larch at chest height on the diameter of the stump growing in the conditions of the Putorana Nature Reserve in Taimyr Forestry. As a result, the assessment of the tapering of the lower part of the trunk of the larch was performed. The approximation of the diameters correlation was performed using a linear regression model with a determination coefficient of 0.90. A comparative analysis of the data on the tapering of larch shape in the study area with data from the Far East and with all-Union standards was carried out. It was found that the lower part of the larch trunk in the buffer zone of the Putorana Nature Reserve is characterized by a higher tapering with a diameter of 32 cm at the root neck relative to the all-Union standards. The ratio of larch diameters found in the study area in the diameter range of 18–32 cm corresponds to the data of the table by A.M. Mezhibovsky and V.E. Schultz.

The completed first cycle of the state forest inventory revealed discrepancies in wood stocks with forest management data. One of the reasons for these deviations is laid down in the current regulations. First of all, these are standard tables of sums of cross sections and stocks. The methodology of their construction is based on growth progress tables, compiled by different methods with unknown accuracy. Therefore, it is necessary to check the current standardized norms on homogeneous experimental material collected with a given accuracy. Such materials are data from the state forest inventory. In this work, based on the materials of the SFI in the Far Eastern taiga forest region, using the example of Daurian larch, a standard table of sums of cross-sectional areas and reserves was checked. Initially, a growth progress table was developed. Then, on its basis, a check of the standard table of sums of cross-sectional areas and stocks was performed. The use of the SFI database for the development of forest taxation standards is an understudied area. Firstly, there is no methodology for constructing such standards based on SFI materials, and secondly, temporary test areas or materials of ocular taxation are traditionally used to build growth progress tables. The number of permanent test areas of the SFI allows to determine the stock of plantings in a forest area with 5 % accuracy. The mass experimental material was initially used to build a growth progress table. The array of model trees was processed by statistical methods. The corresponding regression equations were selected for the averaged lines of height and diameter. A good approximation to the experimental data was shown by the logarithmic equation. The number of trunks per hectare is determined using a thinning constant. Other taxation indicators are found according to well-known formulas and ratios. The stock of the developed growth progress table deviates slightly (+7.6 %) from the stock of normal stands of larch of the third class of bonitet. A slight height deviation was established with the current discharge scale of larch volumes. The developed growth progress table characterizes the average values of larch taxation indicators in the Far Eastern taiga region, regardless of forest types and bonus classes. The standard table of sums of cross-sectional areas and reserves based on it differs from the current one. The line of sums of cross-section areas cuts diagonally the standard table of sums of cross-section areas and stocks developed earlier on the basis of growth progress tables.

Due to the multifactorial nature of biological processes, much attention is paid to the contribution of each factor in explaining the variability of the desired trait. The purpose of this study was to compare the contribution of January, average annual and July temperatures to explain the variability of biomass of stands of two-needled pines in Eurasia in the latitudinal gradient from forest tundra to the tropics. To achieve this aim, the WorldClim version 2.1 climate data-base was used, as well as a database on the biomass of Eurasian forests. It was found that the average temperature in January represents the strongest geographically distributed climatic signal and, accordingly, provides the greatest contribution to explaining the variability of both each of the biomass fractions and the average for all fractions. On average, for all fractions, the contribution of climatic variables when including the average temperature of January, the average annual and average temperature of July in the model is 57, 38 and 16 %, respectively. At the same time, the contribution of taxation indicators increases and amounts to 43, 62 and 84 %, respectively, with a slight decrease in the adequacy of the model.

The indicators of annual seedlings of Siberian pine depending on the method of their cultivation (with open and closed root system on substrates of different composition) were compared. The intraspecific variability of seedlings was revealed in the number and shape of seedling cotyledons and the length of primary needles. The influence of shape on the biometric parameters of seedlings has been established. The above-ground part of seedlings grown using different technologies: with an open root system and a closed one does not have significant differences in biometric indicators by the end of the first growing season. However, seedlings with open root system form a longer root and are distinguished by a greater phytomass of aboveground and underground parts. It was revealed that the composition of the substrate influences the formation of phytomass of seedlings with closed root system. The seedlings were distinguished by their large size and weight of the root system on substrates based on coconut fiber. The weight of the aboveground part of the seedlings prevailed in the variants grown on substrates based on peat.

The data obtained during the research indicate their relevance and the need to continue experiments to select the optimal technology for growing Siberian pine seedlings for the harmonious development of their above-ground and underground parts.

Early diagnosis of tree growth in a plantation is of great scientific and practical interest. The purpose of this research was to test the use of the indicator “tree height at 10 years of age” to predict further growth and productivity of trees in ripening Scots pine forest plantations. Model trees in the sample plots were selected according to the principle of proportional-step representation. After bucking, they were subjected to a full analysis of the tree trunk. As a result of the analysis, the following were calculated: height at 10 years of age, height, diameter and volume of the trunk at 70 years of age. Research has shown that in ripening pine forests, some of the leader trees lose their leading positions, and some of the outsider trees increase their ranking position in height and diameter. Trees of average rank become, as it were, the center during rank movements: their position with age is the most stable in all taxation indicators (height, diameter and volume of the trunk). Thus, height at 10 years of age can be used as a diagnostic feature showing the success of trees in forest plantations of older pine trees.

One of the characteristic features of the modern era is the rapid pace of urbanization - the historical process of increasing the role of cities in the life of society, associated with industrialization and the active spread of the urban lifestyle. “Quality of life” is a concept that reflects the assessment of factors influencing people’s satisfaction with their living conditions. One of the basic principles of environmental protection is to ensure the priority of the preservation of natural ecological systems, landscapes and natural complexes. The ecosystem functions of forests ensure environmental quality at various levels. The article presents an analysis of the current state of research in the field of ecosystem services of urban plantings and the features of their influence on the microclimate of cities, indicative indicators of the performance of ecosystem functions by green spaces in the cities of Moscow and Krasnoyarsk. The data obtained indicate that the currently available urban green spaces are not enough to maintain an ecological balance between the capabilities of natural components and the needs of the population in cities; therefore, the ecosystem services of adjacent territories are used. A strategy for sustainable urban development should be built on this basis.

The results of agrochemical studies of sod-boron sandy and gray humus light loamy soils formed on various elements of the mesorelief, but in plantations close in terms of forestry indicators, traversed by low-level runaway fires of the same strength, are presented.

It has been established that post-pyrogenic changes in the main agrochemical indicators of the studied soils, in general, have a general trend. However, the extent of these changes is determined by factors such as topography and soil properties.

So, for example, due to the very high rate of fire propagation due to the location of the sod-boron soil on a steep southern slope, its litter was to a lesser extent subjected to pyrolysis. As a result, the reduction in the capacity and stock of litter was somewhat weaker here, which, in turn, determined a smaller change in physico-chemical parameters, as well as the content of mobile phosphorus and potassium. In addition, to an important extent, this is due to the active influence of surface and subsurface runoff, due to the location of this soil on a slope and high-water permeability, due to its sandy granulometric composition.

The factor that determined a noticeably lower post-pyrogenic increase in ammonium nitrogen in sod-boron soil is the combination of a lower total content of this element and humus with hydrothermal mineralization conditions characteristic of the southern slopes unfavorable for microorganisms.

Thus, when fires of the same intensity are exposed to forest biogeocenoses with similar characteristics, the initial properties of the latter and the relief play a decisive role in quantitative post-pyrogenic changes in the agrochemical parameters of their soils.

This scientific article notes the need for rational planning for the creation of commercial timber reserves, and in this regard, the need to improve the efficiency of inventory management of a logging enterprise. By analyzing the scientific literature on the issues under consideration, the specifics of the formation of reserves at forestry enterprises have been identified: options for the functioning of the structure of the commodity distribution system of a logging enterprise have been substantiated, depending on the harvesting technology used and the technological transportation scheme used; schemes for the formation of commercial timber reserves were determined depending on the structure of the commodity distribution system and an analysis of their functioning was carried out. The importance of finding an effective solution to the problem of inventory management in the forestry industry is noted. Through the analysis of specialized literature: it was found that various optimization models are proposed as a solution to the problem of inventory management; It was revealed that when developing methodological studies aimed at determining the optimal level of reserves, it is advisable to use dynamic and stochastic modeling tools together with elements of statistical and economic analysis. The necessity of applying a systematic approach to the modeling object is substantiated. It allows us to consider the elements (structural units) of the structure of the commodity distribution system of a logging enterprise as a single whole, as well as to carry out integrated management of commercial timber reserves in this system, taking into account the scheme of their formation. The basis of the model proposed by the authors is: elements of statistical and economic analysis; techniques of linear and dynamic programming; methodological apparatus of systemic and sectoral approaches, economic-mathematical and stochastic modeling. The combination of the listed tools used for development makes it possible for the model to determine the optimal level of the total stock of commercial wood based on a systems approach to be: flexible to changes associated with both the spatiotemporal dynamics of the production environment and the harvesting and removal technology used; quite easy to use; universal for various production conditions. The methodological study is presented with a detailed description of all the dependencies included in it, and the advantages of its application are noted.

The results of the microbiological method of processing by basidial fungi Pleurotus pulmonarius (Fr.) Quél (strain PP-3.2) and Ganoderma lucidum (Curtis) P.Karst (strain Gl4–16A) of the postextraction residue (odubins) formed after extraction of tannins from the bark of Siberian larch with an aqueous solution of monoethanolamine. As a result of biotransformation, the main components of the lignocarbon complex of the substrate are changed. It is noted that easily and hardly hydrolyzable polysaccharides undergo the greatest change. The obtained data will allow expanding the scope of application of tanning and extraction production waste, which is an urgent task of integrated use of recycled wood raw materials.