scholarly journals Comparative analysis of Scots pine homogeneous stands bioenergetic productivity in European North

2021 ◽  
Vol 25 (4) ◽  
pp. 15-20
Author(s):  
D.N. Klevtsov ◽  
◽  
O. N. Tyukavina ◽  
N. R. Sungurova ◽  
◽  
...  
Keyword(s):  
Energy Deposition ◽  
Pine Forests ◽  
Energy Productivity ◽  
Aboveground Phytomass ◽  
European North ◽  
Tree Layer ◽  
Relative Value ◽  
Pine Stands ◽  
Growing Conditions ◽  
Total Stock

The bioenergetic productivity of artificial pine stands is considered. It was found that in 30-year-old artificial pine coenoses, the lowest amount of energy associated with the tree layer is observed in the lichen type of growing conditions (443,1 GJ/ha), the highest — in the blueberry (1915,1 GJ/ha). Bioenergetic productivity occupies an intermediate position (1210,7 GJ/ha) in the cranberry-type forest culture phytocenoses. It is shown that the accumulated energy reaches the highest relative value in such a component of aboveground phytomass as trunk wood. For this fraction, the variation is observed from 50.2% in the lichen type of growing conditions to 65.8% in the blueberry type, based on the total stock of phytomass of forest crops. It is established that the secondary position relative to this indicator is occupied by woody greens. The share of the energy productivity of needles in the total aboveground phytomass decreases with the improvement of forest growing conditions. An approximately equal ratio of energy deposition in the studied types of artificial pine forests by the fractions of bark and live branches (7,2...11,7%) was determined, and the smallest share of accumulated energy falls on the fraction of dry branches (5,3...7,0 %).

scholarly journals Нормативи оцінки фітомаси компонентів стовбура соснових деревостанів Північного Степу України

2019 ◽  
pp. 11-17
Author(s):  
В. М. Ловинська
Keyword(s):  
Correlation Analysis ◽  
Statistical Processing ◽  
Close Relation ◽  
Practical Significance ◽  
Aboveground Phytomass ◽  
Power Resources ◽  
Pine Tree ◽  
The Common ◽  
Pine Stands ◽  
Information Tables

Мета статті – розробити нормативи оцінки компонентів стовбура надземної фітомаси соснових деревостанів в умовах Північного Степу України. Методика дослідження. У представленій роботі використана методика збору та обробки дослідного матеріалу проф. П.І. Лакиди. Зроблено статистичну обробку, кореляційний аналіз та пошук регресійних залежностей компонентів фітомаси стовбура сосни звичайної від таксаційних показників деревостану. Результати дослідження. Сформовано робочий масив даних, який характеризує компоненти фітомаси стовбура для оцінювання біотичної продуктивності штучних соснових деревостанів. Розроблено та наведено математичні моделі оцінки фітомаси деревостанів сосни звичайної за компонентами деревини стовбура, деревини стовбура у корі, кори стовбура. Визначено, що збільшення усіх досліджуваних компонентів надземної фітомаси стовбурів відбувається зі зростанням середніх висот та діаметрів деревостанів. Елементи наукової новизни. На основі регресійних моделей побудовано нормативно-інформаційні таблиці для зони Північного Степу України. Практична значущість. Одержані системи нормативів надають можливість оцінювання екологічних та енергетичних ресурсів, а також розрахувати депонування вуглецю у штучних соснових деревостанах досліджуваного регіону. The purpose of the article is to develop the standards for evaluating the trunk components of the aboveground phytomass of pine stands in the Northern Steppe of Ukraine. Methods of research. The method of collecting and processing the research material, developed by Professor P.I. Lakyda, was used in the presented paper. The statistical processing, correlation analysis and the search of regression dependences of phytomass components of the common pine trunk on the taxation indices of the tree stand were made.           The research results. The working data mass has been formed concerning the results of field and laboratory researches, which characterizes the components of the trunk phytomass for assessing biotic productivity of artificial pine stands in the Northern Steppe of Ukraine. Correlation analysis of the relation closeness of the main phytomass components of the tree stands with their basic taxational signs was carried out. A direct close relation of the trunk phytomass components in the bark and wood without bark with the average tree diameter and the height of stands has been established. The value of correlation coefficient of the bark phytomass with all taxational indices, except the density, demonstrates the moderate relation. Mathematical models have been developed and obtained to assess ordinary pine stands’ phytomass by the components of the trunk wood, trunk wood in the bark, and bark of the trunk. It has been determined that the increase of all the studied components of the aboveground trunk phytomass occurred together with increasing the average heights and diameters of tree stands. The elements of scientific novelty. Standard and information tables have constructed on the basis of regression models for the zone of the Northern Steppe of Ukraine. Practical significance. The obtained systems of standards enable to evaluate ecological and power resources and calculate the carbon sequestration in artificial pine tree stands of the studied region.

Rumen digestibility in dairy cows of starch in near-isogenic lines of wheat

1999 ◽  
Vol 1999 ◽  
pp. 90-90
Author(s):  
P.C. Garnsworthy ◽  
J. Wiseman
Keyword(s):  
Near Isogenic Lines ◽  
Limited Information ◽  
Wheat Varieties ◽  
Isogenic Lines ◽  
Relative Value ◽  
Metabolisable Energy ◽  
Growing Conditions ◽  
The Uk ◽  
Wheat Lines ◽  
Agronomic Conditions

Wheat is a good source of carbohydrates for ruminants, and recent low prices in the UK suggest that usage is likely to increase. However, there is a shortage of information on the digestibility of wheat in the rumen. Such information is vital for predicting the relative value of wheat as a source of fermentable metabolisable energy or by-pass starch. Digestibility is likely to be affected by growing conditions and genetics. Genetic differences are found between wheat varieties, but comparisons of named varieties yield limited information because many characteristics vary simultaneously. This problem can be overcome by using near-isogenic lines of wheat that vary only in a limited number of known characteristics. The objective of this study was to determine the rumen digestion characteristics of different near-isogenic wheat lines grown under the same agronomic conditions.

scholarly journals Influence of growing conditions on the content of Pentaphylloides fruticosa flavonoids during introduction and in nature in the European North

2020 ◽  
Vol 9 (4) ◽  
pp. 104-108
Author(s):  
Svetlana Alekseevna Miftakhova
Keyword(s):  
Geographical Origin ◽  
Komi Republic ◽  
Flowering Phase ◽  
European North ◽  
Medicinal Food ◽  
The Difference ◽  
Pentaphylloides Fruticosa ◽  
Growing Conditions ◽  
One Year ◽  
Promising Source

The paper studies the content of culture and wild samples of flavonoids Pentaphylloides fruticosa (L.) O. Schwarz in the European North. On the territory of the Komi Republic P. fruticosa requires conservation measures. The species is used as an ornamental, medicinal, food, honey and forage plant. When determining the pool of flavonoids of vegetative parts of one-year shoots in the flowering phase, it was found that they were significantly higher in wild samples than in introduced ones. This suggests that geographical growing conditions should influence the amount of flavonoids. The difference in the amount of flavonoids in the flowers between the wild and introduction of the samples was found. There were no significant differences between the introduced samples in the leafing phase and in the flowering phase. In the phase of mass fruiting the amount of flavonoids was significantly higher in sample № 1, due to their different ecological and geographical origin. It is advisable to introduce the culture of these natural samples that grow in the northernmost location in Europe, which can be a promising source of raw flavonoids and their further study in new growing conditions.

scholarly journals Мінливість тривалості веґетаційного періоду у колекційних зразків сої

2018 ◽  
pp. 85-92
Author(s):  
Л. Г. Білявська ◽  
А. М. Рибальченко
Keyword(s):  
Coefficient Of Variation ◽  
Regression Coefficient ◽  
Growing Season ◽  
Vegetation Period ◽  
Maturity Group ◽  
Russian Scientific ◽  
Relative Value ◽  
Russian Scientific Research Institute ◽  
Growing Conditions ◽  
Late Group

Наведено результати вивчення тривалості веґетаційного періоду 145 колекційних зразків сої протягом 2013–2015 рр. На основі статистичного аналізу даних встановлено, що коефіцієнт варіації (V) тривалості веґетаційного періоду за зразками колекції був менший 10 % і коливався від 0,5 % у зразка ВНИИОЗ-76 до 4 % у зразка Merlin.  Коефіцієнт регресії (bi), що характеризує ступінь екологічної пластичності, у колекційних зразківа коливався від -3,31 у сорту Merlin до 3,23 у сорту Ельдорадо. В межах кожної групи стиглості відібрано зразки, які виявилися стабільними. Згідно з екологічною оцінкою за коефіцієнтом регресії (ступенем пластичності) та екологічною стабільністю встановлено відносну цінність 28 генотипів, які були стабільними (bi від 0 до 1) за тривалістю веґетаційного періоду. В ультраскоростиглій групі виділено 6 зразків, скоростиглій – 17 та в пізньостиглій – 5. Виділені генотипи є перспективними для селекційного та практичного використання. The results of studying the duration of the vegetation period of 145 collections of soybeans during 2013–2015 are presented. Based on statistical analysis of the data, the coefficient of variation (V) of the vegetation period according to the collection samples was less than 10 % and varied from 0.5 % in the sample ARSRIHFF-76 (All-Russian Scientific Research Institute of Hunting and Fur Farming) to 4 % of Merlin sample. Regression coefficient (bi), characterizing the degree of ecological plasticity in the collection of samples ranged from -3.31 to 3.23 to Merlin grade class at El Dorado. In each group of ripeness samples were selected which proved to be stable. According to the environmental assessment for the regression coefficient (degree of plasticity) and sustainability set the relative value of 28 genotypes, which were stable (bi from 0 to 1) for the duration of the growing season. 6 samples was in ultra precocious group, 17 samples was in precocious group and 5 samples was in late ripening group. The samples Zlata, Biliavka, Lada, Dione, Anastasia, OAC Vision was stable (bi from 0 to 1) in ultra precocious group. The regression coefficient ranged from 0.08 (Zlata) to the 0.61 (OAC Vision and Anastasia). Other samples responded more to changes in growing conditions. The coefficient of variation in the samples in this maturity group varied from 0.62 % to 2.69 %. 17 stable genotypes selected in the most numerous precocious group: Precarpathian 96, Silver Ruth, Roxolana, Denis, Princess, ARSRIHFF-76, Larisa, Podiaka, Adamos, Ustia, Anzhelika, Suziria, Krasa Podillia, Osoblyva, Deimos, Sylvia. The regression coefficient ranged from 0.02 (Precarpathian 96) to 0.96 (Nattawa). The coefficient of variation in the samples in this maturity group ranged from 0.5 % to 4 %. In the middle-ripening group (121–140 days), the regression coefficient (bi) in the samples was 1>bi. Galyna and Don’ka maximum approaching maturity in the group to environmentally plastic with a regression coefficient 1.38 in both varieties. In late ripening, genotypes such as Del'ta, Vilana, Sedmytsia, Black Jack 21, Hejiao 87-94-3 have been identified. The regression coefficient was 0.36 in the Delta variety to 0.89 in the Hejiao 87-94-3 sample. The coefficient of variation (V) length of the growing season in late group of samples ranged from 0.7 % to 2.45 %. Selected genotypes are promising for breeding and practical use.

scholarly journals The Estimation of the Initial Stage of Succession of Green-pine Trees Windfall in the Eastern Moscow Suburbs

2020 ◽  
Author(s):  
Igor Zykov ◽  
Olga Khotuleva ◽  
Galina Egorova
Keyword(s):  
Life Forms ◽  
Pine Forests ◽  
Soil Conditions ◽  
Soil Mesofauna ◽  
Initial Stage ◽  
Longhorn Beetles ◽  
Standing Trees ◽  
Pine Trees ◽  
Growing Conditions ◽  
Degree Of Participation

The paper is devoted to the study of entomocomplex of stem pests, the number and biology of its dominant species and the ecological structure of the soil mesofauna of the two differing in composition and growing conditions, areas of wind pine forests-green insects. The main causes of windfalls, which are unfavorable soil and soil conditions and the defeat of trees by the root sponge, are established. The degree of participation of different types of feed substrate in the dynamics of the number of stem pests in the lesion is estimated. In addition to the windfall of trees, stem pests are the adjacent one, decreasing the resistance of pine in the walls of the forest, overmature trees or trees weakened by anthropogenic, standing trees, the trunks of which are damaged by windfall to a lesser extent than the remaining standing part of inboard of broken trunks. We identified eight species of entomophagous parasitic on the grubs of Longhorn beetles and jewel beetles. It is noted that the population of ground beetles, in windswept areas studied, is characterized by a decrease in species diversity, a decrease in the number of moisture-loving species typical of pine forests of the Eastern Moscow region, a change in the spectrum of life forms in the direction of reducing litter species and increasing the proportion of litter-soil.

scholarly journals Forest site conditions and the threat for insect outbreaks in the Scots pine stands of Polissya

2020 ◽  
Vol 62 (4) ◽  
pp. 270-278
Author(s):  
Olena Andreieva ◽  
Anatoliy Goychuk
Keyword(s):  
Scots Pine ◽  
Forest Area ◽  
Pine Forests ◽  
Forest Site ◽  
Site Conditions ◽  
Covered Area ◽  
Scots Pine Forests ◽  
Pine Stands ◽  
Forest Enterprises ◽  
Scots Pine Stands

AbstractScots pine (Pinus sylvestris L.) is the most spread forest tree species in Polissya and the most damaged by foliage browsing and stem insects. The aim of this study was to reveal the changes in the distribution of different forest site conditions for 2010–2019 in Scots pine forests of the selected forestry enterprises of Polissya and possible consequences for the spread of foliage browsing insects. Database of Production Association ‘Ukrderzhlisproekt’ (by 2010 and 2019) was analysed for five State Forest Enterprises (FE) that are located in the Central (Zhytomyr Region) and Western (Rivne and Volyn Regions) Polissya, where the large scale outbreaks of stem pests were registered last decade.The types of forest site conditions were designated in accordance with the Ukrainian typology. Distribution of the forest area by trophotops and hygrotops was evaluated for the forest-covered area, for Scots pine stands, and for pure Scots pine stands in 2010 and in 2019.For 2010–2019, the area of all Scots pine forests and its proportion in the forest-covered area has significantly decreased in the most of analysed forest enterprises. The change for 2010–2019 in the distribution both by the tropho-tops and by hygrotops of the entire forest-covered area, the area of all Scots pine forests and pure pine forests is not statistically significant. However, in assessment year 2019, the proportion of stands in the moist types of forest site conditions slightly increased. It may be the result of the stands’ mortality in the driest sites after an outbreak of bark beetles. A greater decrease in the proportion of Scots pine forest area in the dry poor, fresh poor, and dry relatively poor forest site conditions was found in the western direction. Therefore, the noted decrease in the foci areas of foliage browsing insects in Polissya in 2010–2012 compared to the 2000–2002 could be associated with a decrease in the most preferred stands, namely the poorest and driest types of forest site conditions.

scholarly journals The Influence of the Ring Road on the growth of pine stands in Zhernovsky district forestry

2018 ◽  
Author(s):  
В.В. Полякова ◽  
С.Г. Шурыгин
Keyword(s):  
Correlation Analysis ◽  
Vegetation Period ◽  
Climatic Conditions ◽  
Radial Increment ◽  
Construction Technology ◽  
Factors Affecting ◽  
Ring Road ◽  
Pine Stands ◽  
Growing Conditions ◽  
Surrounding Areas

В связи с увеличением территорий крупных городов все больше изымается площадей биогеоценозов под строительство линейных объектов (городская инфраструктура). Это ведет к увеличению нагрузки на биогеоценозы прилегающих к объектам территорий. Одним из наиболее значимых линейных объектов Санкт-Петербурга является кольцевая автодорога (далее – КАД). Строительство и функционирование КАД приводит к нарушению связей между компонентами биогеоценозов и к изменению самих биогеоценозов. В настоящей работе изучалось влияние кольцевой автодороги вокруг Санкт- Петербурга на компонент биогеоценоза – сосновый древостой. В качестве количественного показателя роста соснового древостоя были выбраны радиальные приросты, так как их параметры отражают качество условий произрастания. При анализе радиальных приростов сосновых древостоев, помимо положения от КАД, были учтены климатические условия. Корреляционный анализ подтвердил значимую достоверную связь между радиальными приростами древостоев участка 3 и средней температурой за вегетационный период на 25%. Также корреляционный анализ подтвердил значимую достоверную связь между радиальными приростами древостоев участка 6 и суммарным количеством осадков за вегетационный период на 30%. Дисперсионный анализ показал, что влияние КАД на приросты сосновых древостоев на подтопленных опытных участках 5 и 6 достоверно и составляет 38 и 30% соответственно от всех внешних факторов, влияющих на рост древостоев. Таким образом, полученные результаты подтверждают достоверное влияние КАД, построенное с технологическими нарушениями, так как насыпь КАД на рассматриваемых участках послужила дамбой, подпирающий поток почвенно-грунтовых вод, на рост сосновых древостоев. Наиболее изменчивы приросты древостоев на подтопляемых участках с нарушенным водно-воздушным режимом. The territory of large cities is increasing, larger areas of biogeocenoses are used for the construction of linear objects (urban infrastructure). This leads to an increase of the load on the ecosystems of surrounding areas. The most significant linear object of the city of St. Petersburg is the Ring Road. The construction and operation of the Ring Road leads to the disruption of the links between the components of biogeocenoses and to changes in biogeocenoses themselves. In this paper the influence of the Ring Road of St. Petersburg on the component of biogeocenosis – pine stands was studied. The quantitative indicator of pine stands growth is radial increment. Parameters of radial increment reflect the quality of growing conditions. The influence of position of the Ring Road and climatic conditions on the radial increments of pine stands was taken into account. The correlation analysis revealed a significant reliable relationship between the radial increments of the pine stands of site 3 and the average temperature over the vegetation period by 25%. Also, the correlation analysis revealed a significant reliable relationship between the radial increments of the stands of site 6 and the total amount of precipitation temperature over the vegetation period by 30%. Single-factor analysis of variance showed that the influence of the Ring Road on the growth of pine stands of underflooded sites 5 and 6 is reliable and is 38 and 30%, respectively, of all external factors affecting the growth of stands. The Ring Road was built with the construction technology infringement. The road embankment works as a dam on the way of soil water and groundwater. The obtained results confirm the reliable influence of the Ring Road on the growth of pine stands. The most significant deviation of the increments of stands was on underflooded sites with disturbed water and air conditions.

scholarly journals The Structure of Northern Siberian Spruce–Scots Pine Forests at Different Stages of Post-Fire Succession

Forests ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 558 ◽  
Author(s):  
Natalia I. Stavrova ◽  
Vadim V. Gorshkov ◽  
Paul N. Katjutin ◽  
Irina Ju. Bakkal
Keyword(s):  
Scots Pine ◽  
Size Structure ◽  
Tree Regeneration ◽  
Pine Forests ◽  
Dwarf Shrub ◽  
Species Structure ◽  
Siberian Spruce ◽  
Scots Pine Forests ◽  
Pine Stands ◽  
Scots Pine Stands

The process of post-fire recovery in mixed Siberian spruce–Scots pine forests (Picea obovata Ledeb.-Pinus sylvestris L.), typical for the European North-West, was studied in the Kola peninsula (Russia). We used the spatial–temporal approach to reveal the size structure (diameter at breast height (DBH) distribution) and vital state of Siberian spruce and Scots pine stands, tree regeneration and species structure of the dwarf shrub–herb and lichen–moss layers at different stages of post-fire succession (8–380 years after the fire). It was found that in both forest-forming species, the process of stand stratification results in the allocation of two size groups of trees. In Siberian spruce, these groups persist throughout the succession. In Scots pine, DBH distributions become more homogeneous at the middle of succession (150–200 years after the fire) due to the extinction of small-size individuals. Siberian spruce stands are dominated by moderately and strongly weakened trees at all succession stages. The vitality status of Scots pine stands is higher compared to Siberian spruce up to 150 years after a fire. The dynamics of regeneration activity is similar in both species, with a minimum at the middle of the restoration period. The results indicate that in Siberian spruce–Scots pine forests, the stand structure and regeneration activity differs substantially in the first half of succession (up to 200 years after the fire) and become similar in the late-succession community. The study of lower layers revealed that the cover of moss–lichen and dwarf shrub–herb layers stabilize 150 years after a fire. Changes in species structure in both layers are observed until the late stage of succession. The originality of the structure and dynamics of mixed Siberian spruce–Scots pine forests is revealed based on a comparison with pure Siberian spruce forests in the same region.

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