Optimization of isolation and thinnings modes in the floodplain black alder forests

10.12737/6272 ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 84-98
Author(s):  
Турчина ◽  
Tatyana Turchina
Keyword(s):  
Average Diameter ◽  
Steppe Zone ◽  
Mixed Composition ◽  
Mixed Stands ◽  
Black Alder ◽  
Control Section ◽  
Crown Thinning ◽  
Cutting Intensity ◽  
Positive Effect ◽  
Cutting Modes

In the steppe zone of Russia there is a tendency of increasing the proportion of mixed stands in the structure of riparian black alder forests. In middle-aged and maturing stands they occupy 21-23 % of the area. For such plants regulations of forming mode are absent, and for planting in pure content - require adjustments. In order to justify the feasibility and optimal standards of thinning in pure and mixed stands of natural and artificial origin thinning and felling were hold with a range of cutting intensity from very mild to severe. In pure stands thinning with intensity of 18 % has positively impacted: after 20 years, the average diameter, the absolute completeness and stock is higher for 14 %, 12.5 % and 14 %, respectively. Moderately strong felling in forest plantations of mixed composition had a negative result: in 17 years the completeness and the stock are 68.5 % and 68.4 % from control section indicators. According to forecasts, recovery of indicators of control stands does not happen in 30 years. After the thinnings in pure stands plantations, where grassroots method was used, had a better taxation structure: after 20 years after felling stock of experimental section exceeds the benchmark by 10.3 %, the completeness of- 10.2 %. The result of applying the method of crown thinning is deterioration in the structure of plantations: completeness and the stock reached the targets at 83.1 and 80.0 %, respectively. Thinning in mixed stands on condition of targeted reduction of the share of related species have a positive effect both on the dynamics of restoration of forest indicators and the improvement of sanitary structure of planting. An analysis of the results revealed the most effective cutting modes of formation and proposed regulations for modes of thinning in plantations of black alder of floodplain ecotype in the steppe zone of Russia.

Scientific substantiation to update black alder plantation regeneration regulatory framework in russian steppe zone

10.12737/6549 ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. 147-154
Author(s):  
Турчина ◽  
Tatyana Turchina ◽  
Родин ◽  
Sergey Rodin
Keyword(s):  
Agricultural Practices ◽  
Steppe Zone ◽  
Scientific Basis ◽  
Protective Role ◽  
Regulatory Framework ◽  
Practical Implementation ◽  
Mixed Stands ◽  
Black Alder ◽  
Flowsheet Development ◽  
The Impact

Generalization of the experience of practical implementation of the current regulatory framework reforestation suggests that their use in the current version will not contribute to the conservation of plants, increase their productivity and protective role. There are no ways to restore black alder plantations, no standards for planting material and requirements of young animals, the area of which shall be charged to the lands is covered with forest vegetation. We analyzed the impact of agricultural practices, methods of creation, composition and density on survival, growth, productivity of plantations in the experience forest cultures sampling area (13 areas). The results of research were a scientific basis for the development of a regional process flowsheet development of silvicultural areas. In order to clarify and supplement certain provisions of the framework regulations of thinning, we analyzed the results of experimental logging, tasks of which are differentiated. Their effectiveness is determined by the rate of silvicultural stock recovery. In pure stands the optimal conditions for the development of trees at a young age are formed in high density, so thinning is necessary to start from thinnings. Mixed stands are characterized by low redox potential (recovery of the stock occurs only with a decrease the proportion of willow and intensity of cutting up to 20%) and lower total productivity (to 10.3-45.7% with a decrease in the proportion of willow and 45.7% - in its increase). Mode of logging in them should ensure the formation of pure stands. The regional experience of afforestation and the test results of different modes of thinning are the scientific basis for improving the existing “Reforestation regulations” and “Rules of forest tending”, and for the creation of a regional reforestation program.

scholarly journals Agroecological aspects of application of Pseudomonas sp. DA1.2 in overcoming herbicidal stress in wheat

2020 ◽  
Vol 23 ◽  
pp. 03009
Author(s):  
Maxim. D. Timergalin ◽  
Arina V. Feoktistova ◽  
Timur V. Rameev ◽  
Gaisar G. Khudaygulov ◽  
Sergei N. Starikov ◽  
...  
Keyword(s):  
Bacterial Strain ◽  
Field Experiments ◽  
Steppe Zone ◽  
Pseudomonas Sp ◽  
Synthetic Auxins ◽  
Promising Agent ◽  
Relative Water ◽  
Stress Application ◽  
Positive Effect

This article submits results of laboratory and field experiments on the effect of an auxin-producing bacterial strain Pseudomonas sp. DA1.2 in comparison with Pseudomonas koreensis IB-4 on wheat plants in conjunction with the “Chistalan” herbicide treatment. Our work shows the positive effect of bacterial treatments on plant growth, the relative water content in leaves and the role of bacteria in the redistribution of ABA and IAA in wheat shoots under conditions of herbicidal stress. Application of Pseudomonas sp. DA1.2 together with the herbicide in the field of the steppe zone led to an increase in yield by 20% relative to the control variant. This bacterial strain helps to overcome herbicidal stress and is a promising agent for improving the technology of using synthetic auxins herbicides.

scholarly journals Propagation of three native Brazilian Piper species by cuttings and indole butyric acid

2018 ◽  
Vol 12 (2) ◽  
pp. 491-499
Author(s):  
Aurea Portes Ferriani ◽  
Cícero Deschamps ◽  
Wanderlei Do Amaral ◽  
Luiz Everson da Silva
Keyword(s):  
New Species ◽  
Butyric Acid ◽  
Vegetative Propagation ◽  
Biological Activities ◽  
Average Diameter ◽  
Adventitious Rooting ◽  
Stem Cuttings ◽  
Indole Butyric Acid ◽  
Positive Effect ◽  
Biological Reserve

Native Piper species present significant repellent, antimicrobial, inseticidal, anti-tumor and anti-protozoal biological activities. Studies on new species can discover unpublished potentialities and vegetative propagation for the development of cultivation protocols and reduce the natural extraction. The objective of this study was to evaluate the rooting of P. arboreum, P. cernuum and P. diospyrifolium stem cuttings with different treatments containing doses of indole butyric acid (0, 500; 1,000; 1,500; 2,000 and 3,000 mg L-1). Branches were collected in the “Bom Jesus Biological Reserve”, Parana state, Brazil. The cuttings, with a length of 12 cm and average diameter of 6 mm, were placed in 53 cm3 plastic tubes with the commercial substrate Tropstrato HP® and intermittent misting. After 90 days, the survival, mortality, cuttings with new shoots, number and length of the three main roots were evaluated. The percentages of rooting reached an average of 67.5% for P. arboreum, 51.6% for P. cernuum and 50.4% for P. diospyrifolium. A positive effect in the treatments containing the plant regulator was observed for rooting development, percentage of cuttings with shoots and number of roots per propagule, but there were variations in the responses of each species. Leaf retention was an important factor for the adventitious rooting formation in all evaluated species.

scholarly journals Effect of long-term tending on qualitative and quantitative production in mixed stands of spruce, fir and beech on Motyky research plot

2012 ◽  
Vol 49 (No. 3) ◽  
pp. 108-124 ◽  
Author(s):  
I. Štefančík ◽  
L. Štefančík
Keyword(s):  
Stand Structure ◽  
Mixed Stands ◽  
Dynamic Changes ◽  
Tree Species Composition ◽  
Silvicultural Treatments ◽  
Altitudinal Zone ◽  
Control Dynamic ◽  
Crown Thinning ◽  
And Control

The paper is a contribution to research on thinnings in mixed (spruce-fir-beech) stands situated in the fifth forest altitudinal zone in the central part of Slovakia. Three plots were tended by free crown thinning while one plot was left without any planned silvicultural treatment (as a control). Dynamic changes in tree species composition, stand structure and quantitative production were evaluated for a period of 30 years. A special attention was paid to development of crop trees that are the main bearers of stand quality and quantity. The changes were compared with respect to differences between plots with long-term silvicultural treatments and control plot (without treatments).    

scholarly journals The Accuracy of Standwise Forest Inventory in Mature Stands

2014 ◽  
Vol 32 (1) ◽  
pp. 2-8
Author(s):  
Ainārs Grīnvalds
Keyword(s):  
Forest Inventory ◽  
Alnus Glutinosa ◽  
Volume Estimation ◽  
Individual Species ◽  
Mixed Stands ◽  
Black Alder ◽  
Growing Stock ◽  
Study Results ◽  
Stock Volume ◽  
Mature Stands

Abstract Traditionally forest resources are estimated in each compartment or stand with ocular standwise forest inventory. However, this inventory technique has shortages with measurement accuracy. In the study the accuracy of the standwise forest inventory was estimated by comparing the growing stock volume of the standwise inventory with the accurate (instrumental) re-measurements. Comparison was done with 4515 mature stands of pine (Pinus sylvestris L.), spruce (Picea abies (L.) Karst.), birch (Betula spp.), aspen (Populus tremula L.) and black alder (Alnus glutinosa L.). The stands’ measurements by callipers or by harvesters (recalculated to growing stock volume) were used for accurate re-measurements. The study results show that the volume of standwise forest inventory have relative bias of 17.6% (volume is underestimated by 17.6%) and relative root mean square error 27.5 % for the whole data. Spruce stands are more accurately measured and black alder stands - inaccurately. The accuracy of pine, birch and mixed stands was similar to overall trends. Stands with volume 200 - 300 m3 ha-1 are more accurately measured and stands with the volume less than 200 m3 ha-1 - most inaccurately. The accuracy of stands with the volume more than 300 m3 ha-1, decreases by increasing the volume of stands. The volume estimation of individual species has different trends in standwise forest inventory. The volume of pine and birch is overestimated and the volume of spruce, aspen and black alder is underestimated.

scholarly journals The Effect of Mind Subtraction Meditation Intervention on Smartphone Addiction and the Psychological Wellbeing among Adolescents

2020 ◽  
Vol 17 (9) ◽  
pp. 3263
Author(s):  
Eun-Hi Choi ◽  
Min Young Chun ◽  
Insoo Lee ◽  
Yang-Gyeong Yoo ◽  
Min-Jae Kim
Keyword(s):  
Psychosocial Problems ◽  
Self Control ◽  
Control Group ◽  
Smartphone Addiction ◽  
School Based ◽  
Stress Coping Strategies ◽  
Control Section ◽  
Positive Effect ◽  
Experimental Group

As the smartphone has become an indispensable device in modern lives, consequential psychosocial problems such as smartphone addiction have been getting attention worldwide, especially regarding adolescents. Based on its positive effect on young individuals’ mental health, mind subtraction meditation has been widely applied to many school-based programs in South Korea. This study aims to identify the effects of a school program based on mind subtraction on the smartphone addiction of adolescents. A total of 49 high school sophomores, 24 from the experimental group (mean age = 16), and 25 from the control group (mean age = 16) are included in this case-control study. The experimental group is given the meditation program sessions in the morning, two times a week for 20 min per session, for a total of 12 weeks. The experimental group shows improvements regarding the ‘smartphone addiction’ section (p < 0.001), for instant satisfaction (p < 0.001) and long-term satisfaction (p < 0.001). Concerning the ‘self-control’ section and decreasing stress (p < 0.001), problem focusing (p < 0.001), and social support navigation (p = 0.018), there are improvements in these ‘stress coping strategies’ sections. This study directly shows the positive effect of mind subtraction meditation on smartphone addiction in adolescents and, thus, provides guidance to the future development of smartphone addiction prevention programs for young individuals.

scholarly journals EFFECT OF PSEUDOMONAS PROTEGENS DA1.2 IN COMBINATION WITH HERBICIDES ON THE HORMONAL SYSTEM AND PRODUCTIVITY OF SOFT SPRING WHEAT IN THE CONDITIONS OF THE TRANS URAL STEPPE ZONE

ÈKOBIOTEH ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 276-281
Author(s):  
A.V. Feoktistova ◽  
◽  
M.D. Timergalin ◽  
T.V. Rameev ◽  
Z.R. Sultangazin ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Growth And Development ◽  
Shoot Growth ◽  
Steppe Zone ◽  
Soil Drought ◽  
Combined Stress ◽  
Relative Water ◽  
Hormonal System ◽  
Positive Effect ◽  
Stimulation Of

This article presents data on the effect of a new growth-regulating bacterial strain Pseudomonas protegens DA1.2 on the productivity of soft spring wheat when treated with chyalan and nanomet herbicides under the conditions of the Trans-Ural steppe zone. The introduction of bacteria together with herbicides led to the accumulation of mass and stimulation of shoot growth, as well as maintaining a high relative water content in the leaves. In combinations of bacterial treatments with nanomet, an increased content of ABA and a decrease in the level of IAA in shoots were noted. Together with chistalan, the ABA concentration in the shoots decreased. The ability of bacterial treatments to increase the yield of wheat under conditions of combined stress caused by the action of herbicides and soil drought, due to the positive effect of bacteria on the growth and development of plants, was revealed.

AGROTECHNICAL METHODS FOR INCREASING THE PRODUCTIVITY OF WINTER WHEAT PROMISING VARIETIES

2020 ◽  
Vol 15 (6) ◽  
pp. 777-784
Author(s):  
A.A. Tedeeva ◽  
◽  
V.V. Tedeeva ◽  
Keyword(s):  
Plant Growth ◽  
Winter Wheat ◽  
Plant Growth Regulators ◽  
Quality Indicators ◽  
Growth Regulators ◽  
Steppe Zone ◽  
Wheat Varieties ◽  
Yield And Quality ◽  
Positive Effect ◽  
North Ossetia

The authors present the results of many years research on the study of the growth regulators “ХЭФ ВР” and Stabilan BP influence on the yield and quality of winter wheat of new varieties – Alekseich and Adel, selected by the National Center of Grain named after P. P. Lukyanenko in the steppe zone of the Mozdok region, Republic of North Ossetia – Alania. The aim of our research was to improve the tech nology of winter wheat cultivation using the new generation plant growth regulators “ХЭФК”, which stimulates the growth and volume of the root system, strengthens the stem by reducing the length of internodes and increasing the diameter of the stem, prevents lodging of crops, and has a positive effect on yield and quality. Stabilan slows down the growth of stem cells in length, which leads to a decrease in plant height and thickening of the spike, providing an increase in yield and grain quality. To achieve this goal, the research tasks included studying the effect of plant growth regulators on the growth processes of winter wheat at the initial stages of ontogenesis, on the yield and quality indicators of winter wheat grains of the Alekseich and Adel varieties in the steppe zone of the Mozdok region of the Republic of North Ossetia – Alania. Our studies have shown that growth regulators had a positive effect on the processing of seed material and sowing of winter wheat varieties Alekseich and Adel. The grain yield is increasing; the increase in relation to control was up to – 1.36 t/ha. The growth regulators “ХЭФК” and Stabilan were studied; they had a positive effect on the quality indicators of winter wheat grain, on the protein content, and the weight of 1000 grains. The highest yield was obtained on the variant with the use of the growth regulator “ХЭФК” – 4.63 t/ha.

Formation of oil flax yields when using biological drugs in the Southern Steppe zone of Ukraine

2021 ◽  
pp. 96-104
Keyword(s):  
Seed Treatment ◽  
Organic Fertilizer ◽  
Steppe Zone ◽  
Christmas Tree ◽  
Biological Drugs ◽  
Flax Oil ◽  
Physiological Processes ◽  
Spraying Plants ◽  
The Stability ◽  
Positive Effect

It is noted that flax oil is a promising object in the system of biology of agricultural production, since it has a positive effect on the state of agrophytocoenosis and has a wide nutritional medical and cosmetic application. Production of oilseeds for food and medical purposes should be based on the use of biological preparations of abbrevy, protective and growth of regulatory action. The use of biological preparations on flax crops can improve plant nutrition, provide high-quality protection and contributes to the stability of agrocenoses affected by intensive chemicalization. Modern biological poly functional preparations provide phytohormonal regulation of basic physiological processes in plant organisms and contribute to adaptation to adverse environmental factors such as drought and thermal stress. The purpose of the work is to study the influence of biological preparations on the formation of indicators of oil flax productivity for seed treatment and soliloin feeding of crops during the growing season. The research was carried out on dark chestnut heavy loamy soils in the indigestable crop rotation of the southern Steppe of Ukraine. The object of research is microbiological preparations Ecophosforin, Binok TK, Asphosforin and organic fertilizer Bio-gel, which were used in accordance with the regulations. The experiment used the vera variety, which was grown in compliance with zonal technology. In accordance with the recommendations, biological preparations were used by pre-sowing treatment of seeds on the eve of sowing and spraying plants in the "Christmas tree" phase with a hand sprayer. It has been proved that the use of drugs, improving the nutritional and vital activity of plants, increased the number of boxes and seeds formed by one plant. The use of drugs Ecophosforin and Bio-gel has shown the greatest positive effect on the formation of elements of oil flax productivity compared to control and other options. The average seed weight from one plant was the highest with the double use of organic fertilizer Bio-gel (0.37 g), as well as in the treatment of seeds ecophosforin (0.35 g) and Bio-gel (0.36 g). Treatment of seeds with microbiological preparation Ecophosforin and organic fertilizer Bio-gel increases yield by 0.22 and 0.35 t /ha. Microbiological drug Azotophosforin should be used for processing seeds and crops in the "Christmas tree" phase, which ensures an increase in the yield of oil flax by 0.21 t / ha. The highest yield of seeds was provided by the treatment of seeds with organic fertilizer Bio-gel 0.99 t / ha among microbiological preparations Ecophosforin 0.86 t / ha.

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