Modeling indicators of the growth of even-aged pine plantations with thinning in different types of forest conditions

10.12737/6264 ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 21-28
Author(s):  
Мурзинов ◽  
Yuriy Murzinov ◽  
Малышев ◽  
Vladimir Malyshev ◽  
Петровский ◽  
...  
Keyword(s):  
Scots Pine ◽  
Pine Plantations ◽  
Comparative Characteristic ◽  
Forest Steppe ◽  
Stem Wood ◽  
Silvicultural Treatments ◽  
Protected Forests ◽  
Different Types ◽  
Computer Calculations ◽  
Forest Conditions

Creating forest plantations, used in these soil preparation techniques, agricultural activities, as well as the selection of the optimum species composition and subsequent silvicultural treatments are developed in accordance with different types of forest conditions. These conditions greatly affect the overall performance and progress of growth stands. The results of numerical analysis and the use of tables of plantation growth of Scots pine growing in various types of forest conditions (A2, B2) are given, reflecting changes in the stock of stem wood with age under the influence of thinning. According to the cutting age (maturity) for Scots pine optimal thinning regimes are presented in protected forests of forest-steppe region of the European part of the Russian Federation. To determine the optimal regimes of thinning of forests computer program was used that allows you to optimize conducting of thinning and calculate the objective function of stem wood for different target diameters of technical maturity. Computer calculations made it possible to compare the effectiveness of silvicultural thinning in Scots pine plantations according to standard regulations and recommended modes of forest care. Proposed options of thinning are different in conducting more intensive thinning at the age of clearings at forming the composition of plants and relatively low percentage of thinning at the age of caring for growth stands. The comparative characteristic of the performance of Scots pine plantations and the target output function of stem wood depending on the desired diameter is given. As a result of numerical calculations some conclusions and recommendations for thinning in pine plantations were obtained, depending on the type of site conditions.

scholarly journals Current state and productivity of age-old experimental plantations of prof. V.D. Ogievsky in the northeastern part of Ukraine

2021 ◽  
Vol 63 (3) ◽  
pp. 195-202
Author(s):  
M. Zhezhkun ◽  
L.V. Demianenko
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Natural Regeneration ◽  
Health Condition ◽  
Pine Plantations ◽  
Mixed Composition ◽  
Natural Origin ◽  
Stem Wood ◽  
Current State ◽  
Pine Stands

Abstract This research is aimed at determining the health condition and productivity of Scots pine (Pinus sylvestris L.) stands created during 1906–1908 on the initiative of Prof. V. D. Ogievsky. The scheme of silvicultural experiments included: determining the influence of different widths and directions of clear felling on the natural regeneration, testing of pine plantations of pure and mixed composition and the choice of methods for their creation. In terms of health condition, 103–105-year-old artificial pine stands are weakened and their health condition is slightly worse compared to the aged pines of natural origin. The productivity of age-old linden-pine plantations is higher than of pure pine plantations, and the stock of stem wood in plantations created by seed sowing and marketability is higher compared to the plantations created by planting seedlings.

ASSESSMENT OF PINE CROPS GROWTH IN BAIMAK FORESTRY

2020 ◽  
Vol 37 (3) ◽  
pp. 83-90
Author(s):  
T.Z. Mutallapov ◽  
Keyword(s):  
Scots Pine ◽  
Forest Ecosystem ◽  
Distribution Curve ◽  
Comparative Assessment ◽  
Tree Distribution ◽  
Entire Structure ◽  
Structure Changes ◽  
Large Trees ◽  
Different Types ◽  
The Stability

The article presents the results of evaluating the growth of Scots pine in the Baymak forest area. The analysis of forestry and taxation indicators of Scots pine crops on the studied sample areas is carried out, and a comparative assessment of the growth of forest crops growing in different types of forest is given. Increased competition in plantings leads to the natural decline of stunted trees, which is the result of differentiation in the stand. As a result, its structure changes, the number of large trees increases, and, accordingly, the stability of the forest ecosystem increases. In this regard, the appearance of the tree distribution curve by thickness levels also changes. It becomes more "flat", and its competitive load is more evenly distributed over the entire structure of the stand, and competition is weakened.

Radial increment dynamics of Scots pine (Pinus sylvestris L.) as an indicator of hydrothermal regime of the Western Transbaikalia forest steppe

2017 ◽  
Vol 10 (5) ◽  
pp. 476-487 ◽  
Author(s):  
A. V. Demina ◽  
L. V. Belokopytova ◽  
S. G. Andreev ◽  
T. V. Kostyakova ◽  
E. A. Babushkina
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Forest Steppe ◽  
Radial Increment ◽  
Western Transbaikalia ◽  
Hydrothermal Regime

scholarly journals Highly Productive Pine Forests in a Changing Climate

2021 ◽  
pp. 9-23
Author(s):  
Nina F. Kuznetsova ◽  
◽  
Elena S. Klushevskaya ◽  
Elena Yu. Amineva
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Genetic Material ◽  
Weather Conditions ◽  
Test Site ◽  
Pine Forests ◽  
Soil Drought ◽  
Forest Steppe ◽  
Changing Climate ◽  
Vital State

Forest steppe of the Central Chernozem Region (CCR) of Russia belongs to the zone of highly productive pine forests. In 2015, for the first time a partial destabilization of Scots pine (Pinus sylvestris L.) was recorded within the territory of the CCR. It affected the population, organism and cellular levels of Scots pine (Pinus sylvestris L.). The destabilization was caused by the 8-year heatwave of 2007–2014 followed by a sharp drop in the water table and four severe droughts (2007, 2010, 2012, and 2014). The analysis was carried out on two sites of pine forest plantations growing in the environmentally sound region: the Stupino test site (Voronezh region, typical plantation for the CCR) and the Usman site (Lipetsk region, lands with elevated groundwater level). The results of morphological, cytogenetic and biochemical studies of model trees of the Stupino test site during the following periods are presented: 4 optimal years in terms of weather conditions, 2014 drought year and 2015 destabilization year. It was found that prolonged hydrothermal stress resulted in the transition of pine from the basic equilibrium state to a slightly nonequilibrium state. The trigger mechanism for changing their vital state was a severe autumn soil drought in 2014, after which the plants became weakened right before winter. A decrease in cone bioproductivity by the traits of seed fullness and the total number of seeds per cone, a change in population sampling structure, an increase in the number of mitosis pathologies, and an increase in proline content in needles were observed despite optimal weather conditions in 2015. The recovery of species was studied for three subsequent optimal years on the example of the Stupino and Usman populations. Experimental data indicate that the processes of vital state normalization involve profound changes in metabolism and require certain energy expenditures. It took the Stupino population longer to return to the regional norm, which indicates a different depth of destabilization of the tree genetic material of the studied populations. For citation: Kuznetsova N.F., Klushevskaya E.S, Amineva E.Yu. Highly Productive Pine Forests in a Changing Climate. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 9–23. DOI: 10.37482/0536-1036-2021-6-9-23

scholarly journals Föhrenverjüngung: Plastizität und Akklimatisation in einem trockeneren Klima

2018 ◽  
Vol 169 (5) ◽  
pp. 269-278
Author(s):  
Barbara Moser ◽  
Christoph Bachofen ◽  
Thomas Wohlgemuth
Keyword(s):  
Scots Pine ◽  
Natural Regeneration ◽  
Common Garden ◽  
Forest Steppe ◽  
Short Time Scale ◽  
Summer Drought ◽  
Spring Precipitation ◽  
Pine Regeneration ◽  
A Minor ◽  
Rhone Valley

Pine regeneration: plasticity and acclimation in a dryer climate Increasing summer drought might limit the natural regeneration of Scots pine stands at low elevations of the Rhone valley. Common garden experiments at the forest-steppe ecotone have shown that emergence and establishment of Scots pine primarily depend on spring precipitation and, to a minor degree, on summer drought and rising temperatures. Scots pine seedlings acclimated rapidly to drought periods by favouring root to shoot growth. In the second year, the saplings were already adapted to drought so that most of them survived an extended spring and summer drought, as recorded at Sion twelve times during the last 154 years. Only an extreme summer drought – no water from June to September – killed 14.7% of the Scots pine saplings. Surprisingly, they were even able to acclimate to such extreme drought events: after the same extreme summer drought in the third year, mortality dropped below 5%. In general, the Scots pine was very plastic, i.e. seedlings and saplings changed their phenotype depending on environmental conditions. But we also found genetic adaptation: Scots pine originating from regions with pronounced summer drought, including populations from lower elevations in the Rhone valley, produced more biomass than those from moister regions in all treatment combinations. Black pine reacted similarly to the treatments like Scots pine, but it grew faster and more saplings survived the first extreme summer drought. These results show that Scots pine from low elevations of the Rhone valley is one of the most drought-tolerant provenances in Europe. Thanks to its high phenotypic plasticity and the ability of seedlings and saplings to acclimate to drought on a short time scale, natural regeneration of Scot pine at low elevations of the Rhone valley is likely to occur also under future conditions, but maybe less frequent than today.

scholarly journals Parameters of Pinus sylvestris health condition and Ips acuminatus population in pure and mixed stands of Sumy region

2020 ◽  
pp. 131-140
Author(s):  
Valentyna Meshkova ◽  
Ivan Bobrov
Keyword(s):  
Scots Pine ◽  
Bark Beetles ◽  
Forest Health ◽  
Health Condition ◽  
State Enterprise ◽  
Forest Steppe ◽  
Population Parameters ◽  
Mixed Stands ◽  
Pine Stands ◽  
Scots Pine Stands

Outbreaks of bark beetles have increased in recent years in various regions. Pine engraver beetle (Ips acuminatus (Gyllenhal, 1827); Coleoptera: Curculionidae: Scolytinae) is most common in the pine forests of many European countries. Research on its biology and spread carried out in different natural conditions, phases of pest outbreak and considered various parameters to characterize the population of the pest and forest health condition. The aim of the research was to compare the health condition of Scots pine stands and population parameters of I. acuminatus in its two generations in pure and mixed stands in Polissya and Forest-steppe parts of Sumy region. Research was carried out in 2017 in the pure Scots pine stands and mixed stands with Scots pine and other forest species in Polissya (State Enterprise "Seredyno-Budsky Agroforest Economy"; State Enterprise "Seredyno-Budsky Forest Economy") and Forest-steppe parts (State Enterprise "Velykopysarivske Agroforest Economy"; State Enterprise "Okhtyrske Forest Economy") of Sumy region at 26 sample plots. In sample plots, parameters of forest health condition and bark beetle population were assessed in June and in September, after completion of development of spring and summer generation of I. acuminatus.  By most of the parameters assessed, significant differences between sample plots in Forest-Steppe and Polissya parts of Sumy region were not found. In pure Scots pine stands the mean area of bark beetles’ foci and bark beetles’ production were larger in Forest-steppe in June, and the density of Ips acuminatus nuptial chambers in June and September. In pure Scots pine stands the area of I. acuminatus focus, the number of colonized trees, the proportion of recently died trees, health condition indices, the density of egg galleries and nuptial chambers as well as young beetle’s production increased from June to September. In mixed stands the focus area, the number of colonized trees and health condition index increased insignificantly, and population parameters of I. acuminatus decreased from June to September. Pure Scots pine stands changed the health condition from "severely weakened" to "drying up" in three months, and mixed ones remained in the "weakened" category. In pure pine stands, the density of egg galleries and beetles of the young generation increased for three months from the lower limit of a moderate level to a high level, the density of nuptial chambers – from low to a high level. In mixed stands, all population parameters of I. acuminatus correspond to a low population level. The parameters characterizing the investigated foci of I. acuminatus in the Sumy region significantly correlated with the participation of pine in the stand composition, and in September the correlation is closer than in June. The data obtained indicate the feasibility of creating predominantly mixed pine stands.

POTASSIUM BALANCE IN THE SOIL AND THE EFFECTIVENESS OF POTASSIUM DEFICIENCY SYSTEM OF FERTILIZATION

2020 ◽  
Vol 2 ◽  
pp. 56-61
Author(s):  
Н. M. Hospodarenko
Keyword(s):  
Crop Rotation ◽  
Spring Barley ◽  
Barley Straw ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Field Crop ◽  
Heavy Loam ◽  
Different Types ◽  
Loam Soil ◽  
The Right

The influence of long-term application of different doses and ratios of mineral fertilizers in field crop rotation on the content of basic nutrients in grain and straw of spring barley has been established. The study was held in the conditions of podzolic black heavy loam soil of the Right-Bank Forest-Steppe of Ukraine. The relative nutrients removal by spring barley depending on the doses of different types of fertilizers and their combinations in the field crop rotation is calculated. It is shown that the content of basic nutrients in the harvest of spring barley (grain and straw) significantly depends on the content of their mobile compounds in the soil. This is especially true of nitrogen and less of potassium. Economic removal of nutrients from the grain harvest of spring barley depends on the doses of fertilizers in the field crop rotation and the ratio of nutrients in them. The largest share is nitrogen (65–122 kg / ha), followed by K2O - 47–92 and P2O5 26–51 kg / ha. From 1 ton of grain and the corresponding amount of straw, spring barley of the Commander variety removes 19.2–22.4 kg of nitrogen, 7.8–9.2 - P2O5 and 14.0–16.8 kg of K2O from the soil, depending on the fertilizer and saturation of field crop rotation with different types of fertilizers. Straw is an important source of soil organic matter reproduction and the return of nutrients used for crop formation. Depending on the system of fertilization, 17–25% of nitrogen, 25–30% of phosphorus and 68–69% of potassium are returned to the soil with spring barley straw via economic removal. It is specified that spring barley of the Commander variety absorbs N, P2O5 and K2O in the following ratio: 1: 0,4: 0,3 to form a unit of grain yield and the corresponding amount of straw in the conditions of podzolic black heavy loam soil of the Right-Bank Forest-Steppe.

scholarly journals Forest Management Intensity: A Comparison of Timber Investment Management Organizations and Industrial Landowners in Mississippi

2003 ◽  
Vol 27 (2) ◽  
pp. 83-91 ◽  
Author(s):  
Ian A. Munn ◽  
W. Rhett Rogers
Keyword(s):  
Forest Management ◽  
Natural Regeneration ◽  
Management Practices ◽  
Response Rate ◽  
Pine Plantations ◽  
Property Taxes ◽  
Investment Management ◽  
Chemical Release ◽  
Silvicultural Treatments ◽  
Management Intensity

Abstract All timberland investment management organizations (TIMOs) and industrial landowners in Mississippi were surveyed during 1998 and 1999 to determine their annual forest management practices and related expenditures. The response rate was 65%, and respondents accounted for approximately 90% of the timberland owned by these two landowner groups. For analysis purposes, industrial landowners were separated into two categories: large (>10,000 ac) and small (<10,000 ac). Pine plantations represented 66% of TIMOs' timberland base compared to 55% for large industrial landowners and less than 50% for small industrial landowners. Over the 2 yr study period, TIMOs and large industrial landowners invested heavily in site preparation and planting as well as midrotation chemical release and fertilization. In contrast, small industrial landowners relied on natural regeneration to a much greater extent and conducted few, if any, midrotation treatments. As a group, TIMOs and industrial landowners spent approximately $20/ac annually on their Mississippi timberlands. Overhead represented slightly over 40% of this total, with silvicultural treatments accounting for the remainder. Property taxes represented the largest overhead expense. In total, these landowners spent $67 million in 1998 and $54 million in 1999 to maintain and manage their Mississippi timberlands. South. J. Appl. For. 27(2):83–91.

Sign in / Sign up

Export Citation Format

Share Document