scholarly journals Laboratory germination and storage of seeds of tree and shrub introduced species

2020 ◽  
pp. 71-80
Author(s):  
E. G. Khudonogova ◽  
M. A. Tyapaeva
Keyword(s):  
Pinus Sylvestris ◽  
Shelf Life ◽  
Introduced Species ◽  
Betula Pendula ◽  
Corylus Avellana ◽  
Schisandra Chinensis ◽  
Phellodendron Amurense ◽  
Juglans Mandshurica ◽  
Picea Obovata ◽  
Picea Pungens

The article presents the results of research on laboratory germination of seeds of tree and shrub introduced species. Introduced seeds were collected from existing plantings in Irkutsk and the Irkutsk region. To speed up germination and increase the percentage of germination, seed stratification was performed. Seeds of Spiraea media, Betula pendula, Picea obovata, Picea pungens, Pinus sylvestris, as a rule, do not require stratification, or for violation of shallow rest, the seeds need short-term cooling (for several hours, days or weeks). Cold stratification is required for seed germination of Betula ermanii, Clematis fusca, Corylus avellana, Juglans mandshurica, Phellodendron amurense, Syringa vulgaris . Multistage stratification is recommended for Schisandra chinensis seeds. Within a few days, the seeds of Populus alba and Scopulus balsamifera lose their ability to germinate. Quercus mongolica seeds completely lose their germination by spring sowing when stored dry. Seeds of Corylus avellana, Juglans mandshurica, Phellodendron amurense, Schisandra chinensis can be stored for only one year. The shelf life of Betula ermanii and Betula pendula seeds is 3-4 years. Picea obovata, Picea pungens, Pinus sylvestris retain germination for 4-5 years. Studies have shown that the shelf life of Spiraea media, Syringa vulgaris, Clematis fusca seeds for 4-5 years did not affect the percentage of their germination.

scholarly journals Аналіз стану зелених насаджень Парку молоді міста Рівне

2019 ◽  
pp. 33-39
Author(s):  
Natalya Denysyuk
Keyword(s):  
Pinus Sylvestris ◽  
Betula Pendula ◽  
Robinia Pseudoacacia ◽  
Aesculus Hippocastanum ◽  
Salix Alba ◽  
Thuja Occidentalis ◽  
Picea Pungens

У статті проаналізовано видовий склад зелених насаджень Парку молоді м. Рівне. Визначено, що його дендрофлора нараховує 66 видів, які належать до 23 родин відділів Pinophyta і Magnoliophyta. Найбільшою кількістю видів та форм представлено родини Rosaceae, Cupressaceae, Pinaceae, Oleaceae, Salicaceae, Aceraceae (74,1 %). Домінують тут Thuja occidentalis, Pinus sylvestris, Betula pendula, Aesculus hippocastanum, Picea pungens, Pinus abies, Salix alba, Robinia pseudoacacia. Серед чагарників переважають Syringa vulgaris, Forsythia suspense (10,02 %). Інтродукованих видів маємо 69,67 % від загальної кількості деревно-чагарникових рослин. За вибагливістю до вологи (за С. С. П’ятницьким, В. Я. Заячуком) дендрофлора парку представлена таким чином: мезофіти – 40,3 %; ксеромезофіти – 30,59 %; ксерофіти – 14,05 %; мезоксерофіти –7,69 %; мезогігрофіти – 6,44 %; гігрофіти – 0,93 %. За вибагливістю до родючості ґрунту екологічні групи деревних і кущових насаджень (за С. С. П’ятницьким) у парку є такими: оліготрофи – 53,73 %; мегатрофи – 28,18 % та мезотрофи – 18,09 %. За вибагливістю до світла (за В. Я. Заячуком) найчисленніші відносно тіньовитривалі, тіньовитривалі та дуже світлолюбні деревно-чагарникові рослини. Установлено, що газостійких дерев і кущів у парку нараховується 61,72 %, середньогазостійких – 11,1 %. У задовільному стані зперебувають 78 % дерев та кущів парку, 15 % – у доброму стані, у незадовільному – 7 %. Більшість дендрофлори (63,8 %) за ознакою довговічності представлено мало- й недовговічними породами дерев і кущів. Це свідчить про потребу часткового оновлення паркового комплексу, доповнення наявного асортименту зелених насаджень довговічними та швидкорослими породами й формами дерев і кущів, стійкими до антропогенних впливів, хвороб та шкідників.

ИЗМЕНЕНИЕ РАЗМЕРОВ И УДЕЛЬНОЙ ПОВЕРХНОСТНОЙ ПЛОТНОСТИ ЛИСТЬЕВ У ДЕРЕВЬЕВ ВДОЛЬ ЗОНАЛЬНО-КЛИМАТИЧЕСКОЙ ТРАНСЕКТЫ УРАЛА, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

2012 ◽  
pp. 1293-1300
Author(s):  
С.В. МИГАЛИНА
Keyword(s):  
Pinus Sylvestris ◽  
Betula Pendula ◽  
Larix Sibirica ◽  
Picea Obovata ◽  
Abies Sibirica

Определяли площадь, толщину и удельную поверхностную плотность листьев в природных популяциях Pinus sylvestris, P. sibirica, Picea obovata , Abies sibirica, Larix sibirica, Betula pendula, B. pubescens вдоль зонально-климатической трансекты Урала общей протяженностью около 1000 км. Найдены закономерные изменения изученных признаков в зависимости от географического положения популяций. В климатическом градиенте виды имели различные направления изменения площади, толщины и удельной поверхностной плотности листа. Сделан вывод о многообразии путей структурных перестроек листьев, обеспечивающих поддержание углеродного баланса при изменении условий среды.

Carbon and Nitrogen Isotope Composition of the Wood of Pinus sylvestris, Betula pendula and Populus tremula

2020 ◽  
Vol 54 (8) ◽  
pp. 819-824
Author(s):  
P. Yu. Voronin ◽  
V. A. Mukhin ◽  
T. A. Velivetskaya ◽  
A. V. Ignatiev ◽  
Vl. V. Kuznetsov
Keyword(s):  
Pinus Sylvestris ◽  
Betula Pendula ◽  
Isotope Composition ◽  
Nitrogen Isotope ◽  
Populus Tremula ◽  
Carbon And Nitrogen ◽  
Nitrogen Isotope Composition

scholarly journals Preliminary evaluation for quality of dimension lumber in four common softwoods in Mongolia

2020 ◽  
Vol 66 (1) ◽  
Author(s):  
Murzabyek Sarkhad ◽  
Futoshi Ishiguri ◽  
Ikumi Nezu ◽  
Bayasaa Tumenjargal ◽  
Yusuke Takahashi ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Modulus Of Rupture ◽  
Preliminary Evaluation ◽  
Pinus Sibirica ◽  
Bending Properties ◽  
Picea Obovata ◽  
Dimension Lumber ◽  
Commercial Species ◽  
Characteristic Values

Abstract The quality of dimension lumber (2 by 4 lumber) was preliminarily investigated in four common Mongolian softwoods: Pinus sylvestris L., Pinus sibirica Du Tour, Picea obovata Ledeb., and Larix sibirica Ledeb. to produce high quality dimension lumber for structural use. In total 61, 39, 67, and 37 pieces of lumber were prepared for Pinus sylvestris, Pinus sibirica, Picea obovata, and L. sibirica, respectively. The lumber was visually graded and then tested in static bending to obtain the 5% lower tolerance limits at 75% confidence level (f0.05) of the modulus of elasticity (MOE) and the modulus of rupture (MOR). In addition, the effects of sawing patterns on bending properties were also analyzed. The f0.05 of the MOE and MOR were 4.75 GPa and 15.6 MPa, 3.39 GPa and 11.0 MPa, 3.78 GPa and 11.7 MPa, and 6.07 GPa and 22.3 MPa for Pinus sylvestris, Pinus sibirica, Picea obovata, and L. sibirica, respectively. These results suggested that with a few exceptions, characteristic values of MOR in the four common Mongolian softwoods resembled those in similar commercial species already used. In visual grading, over 80% of total lumber was assigned to select structural and No. 1 grades in Pinus sylvestris and Pinus sibirica, whereas approximately 40% of total lumber in L. sibirica was No. 3 and out of grades. Sawing patterns affected bending properties in Pinus sylvestris and L. sibirica, but did not affect Pinus sibirica and Picea obovata. Dynamic Young's modulus was significantly correlated with bending properties of dimension lumber for the four species. Based on the results, it was concluded that dimension lumber for structural use can be produced from the four common Mongolian softwoods.

scholarly journals A contribution to the knowledge of biology and harmfulness of Deporaus betulae (L.) (Coleoptera, Attelabidae)

2012 ◽  
Vol 60 (6) ◽  
pp. 317-338 ◽  
Author(s):  
Jaroslav Urban
Keyword(s):  
Fagus Sylvatica ◽  
Betula Pendula ◽  
Leaf Blade ◽  
Alnus Glutinosa ◽  
Field Studies ◽  
Corylus Avellana ◽  
Quercus Petraea ◽  
Egg Laying ◽  
Tilia Cordata ◽  
Average Area

The paper deals with the occurrence, development and harmfulness of Deporaus betulae (L.). The majority of field studies was carried out at Training Forest Enterprise (TFE) Masaryk Forest in Křtiny (District Brno-venkov) in 2010 and 2011. In addition to this, the species was studied in detail also in a laboratory. It occurred mostly on Betula pendula and Carpinus betulus. Rarely, the species was found on Alnus glutinosa and Corylus avellana and only sporadically on Fagus sylvatica, Quercus petraea, Tilia cordata and T. platyphyllos. In the studied area, larvae and pupae hibernate. Beetles occur on trees from the end of April to the beginning of July, sporadically later. Females lay on average 2.5 (in the laboratory 4.4) eggs into rolls on B. pendula, on C. betulus 2.2 eggs. During two months, they damage on average 5.3 cm2 leaves creating 14 rolls and laying 35 eggs into the rolls. Larvae consume only 1.7 cm2 leaf blade. The development of the species takes three to four months from egg laying to the departure of larvae into soil. On leaves of B. pendula of an average area of 14.2 cm2, females roll up the same area (about 11.2 cm2) as on leaves of C. betulus of an area of 21.7 cm2. Into the rolls, they lay on average the same number of eggs. The average number of eggs in rolls increases with the increased area of B. pendula leaf blade. Trees partly compensate for the reduction of assimilatory area also by the growth of the area of neighbouring undamaged leaves (on average by 12.7 %).

scholarly journals ФІТОТОКСИЧНІ ВЛАСТИВОСТІ ДЕЯКИХ ДЕРЕВНИХ РОСЛИН

World Science ◽  
2019 ◽  
Vol 1 (3(43)) ◽  
pp. 40-45
Author(s):  
Мегалінська Г. П. ◽  
Пакірбаєва Л. В. ◽  
Білик Ж. І. ◽  
Даниленко Є. В. ◽  
Гатальська Є. О.
Keyword(s):  
Picea Abies ◽  
Pinus Sylvestris ◽  
Quercus Robur ◽  
Betula Pendula ◽  
Robinia Pseudoacacia ◽  
Water Extract ◽  
Populus Tremula ◽  
Allelopathic Effect ◽  
Carpinus Betulus ◽  
Phytotoxic Activity

The results of the study of phytotoxic effects of water extracts from Pinus sylvestris L., Betula pendula Roth, Quercus robur L., Picea abies (L.) Karst. P. excelsa Link, Carpinus betulus L., Robinia pseudoacacia L., Populus tremula L., Crataegus submollis L. are presented. For а comparison of the phytotoxic activity of the investigated plants was used to measure the change in the intensity of the mitotic division, depending on the concentration of aqueous extraction of plant material (tangent trend curve of cytostatic activity). According to this parameter, the following row of phytotoxic activity of wood species can be ordered: Populus tremula, Betula pendula, Robinia pseudoacacia, Carpinus betulus, Acer platanoides, Tilia cordata, Pinus sylvestris. Water extract Quercus robur and Picea abies have discovered a phyto-stimulating effect. The results of the study allow us to discuss the possibility of introducing the parameter of the phytotoxicity coefficient to determine the allelopathic effect in the tree-tree system.

Cyrtidula quercus. [Descriptions of Fungi and Bacteria].

2015 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Geographical Distribution ◽  
Western Australia ◽  
Conservation Status ◽  
Alnus Glutinosa ◽  
Corylus Avellana ◽  
Phellodendron Amurense ◽  
Ilex Aquifolium ◽  
Irish Republic

Abstract A description is provided for Cyrtidula quercus. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (USA (Missouri and Washington), Japan, Australia (Western Australia), Austria, Belgium, Denmark, France, Germany, Irish Republic, Italy, Luxembourg, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland, UK and Yugoslavia) and hosts (Quercus sp., Alnus glutinosa, Betula sp., Corylus avellana, Corylus sp., Crataegus sp., Ilex aquifolium, Phellodendron amurense, Populus sp., Quercus garyana, Q. petraea, Q, robur and Trentepohlia sp.).

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