scholarly journals Seedbed and moisture availability determine safe sites for early Thuja occidentalis (Cupressaceae) regeneration

2000 ◽  
Vol 87 (12) ◽  
pp. 1807-1814 ◽  
Author(s):  
Meredith W. Cornett ◽  
Peter B. Reich ◽  
Klaus J. Puettmann ◽  
Lee E. Frelich
Keyword(s):  
Safe Sites ◽  
Thuja Occidentalis ◽  
Moisture Availability

Use of Ornamental Trees in Dating of Abandoned Cemeteries on the Example of Thuja Occidentalis and Thuja Orientalis

2012 ◽  
Vol 1 (1) ◽  
pp. 45-50
Author(s):  
Magdalena Opała ◽  
Leszek Majgier
Keyword(s):  
Climatic Conditions ◽  
The Other ◽  
Lake District ◽  
Thuja Occidentalis ◽  
North Eastern ◽  
The 1960S ◽  
Thuja Orientalis ◽  
Ornamental Trees ◽  
Common Tree ◽  
Local Habitat

Abstract Due to the lack of maintenance, abandoned cemeteries are often incorporated into the landscape. In many cases the information about the age of the cemetery is unavailable. To find out the approximate time of the formation of the cemetery the information recorded in the annual tree and shrub rings can be used. One of the most common tree species, planted for ornamental and symbolic purposes on the cemeteries, are Thuja orientalis and Thuja occidentalis. Alien to the Polish flora, these species adapted well to the local habitat and climatic conditions. The paper presents an attempt to apply dendrochronological dating to determine the age of the abandoned cemeteries in the region of the Great Masurian Lakes, part of the Masurian Lake District (north-eastern Poland). The study included five abandoned cemeteries. In total, 15 cores were taken from the trees. After applying the standard dendrochronological method, local chronologies for the studied species were established. The research indicated that the oldest found specimens - over 70 yrs old - are Thuja occidentalis individuals growing at the Słabowo cemetery. At the other sites the specimens of both Thuja species date back to the 1960s and early 1970s. Compared to the historical information regarding the age and origin of the studied objects, thujas growing there are much younger than the age of the cemeteries foundation. The presented method proved to be very helpful in understanding the time of Thuja occidentalis and Thuja orientalis introduction at the investigated cemeteries.

Перспективные интродуцированные сорта туи (Thuja L.) для озеленения в условиях юга России

2018 ◽  
pp. 18-22
Author(s):  
Руслан Бесланович Хупов ◽  
Римма Шамсудиновна Заремук
Keyword(s):  
Thuja Plicata ◽  
Thuja Occidentalis

Представлены результаты изучения сортов туи (Thuja L.) в условиях прикубанской зоны садоводства Краснодарского края по основным адаптивным признакам: зимостойкость (морозоустойчивость), засухоустойчивость (жаростойкость), устойчивость к доминирующим болезням (Lophodermium seditiosum), вредителям (Aphidoidea latreille и Carulaspis caruelii). Оценены декоративные признаки сортов. Целью исследований являлись комплексная оценка и выделение наиболее адаптивных и проявляющих максимально высокую декоративность сортов Thuja occidentalis и Thuja plicata в условиях участившихся абиотических и биотических стрессов, а также расширения современного сортимента вечнозелёных хвойных растений при создании живых изгородей и топиарных форм в условиях юга России. Представлены итоги комплексной оценки интродуцированных сортов туи Brabant, Degroots Spire, Malonyana, Mini Smaragd, Atrovirens, Can-Can и Dura. Установлено, что декоративные показатели сортов туи определяются сортовой спецификой, прежде всего относительной устойчивостью к болезням, вредителям в конкретных условиях произрастания. Из 7 сортов выделены наиболее адаптивные, сочетающие устойчивость к температурным стрессам (засухоустойчивые, зимостойкие), основным болезням и вредителям в сочетании с высокими декоративными показателями (архитектоника кроны, цвет и аромат хвои, период декоративности и др.). Сорта туи Degroots Spire, Mini Smaragd, Atrovirens и Dura по комплексу признаков отнесены к хорошо адаптированным к погодно-климатическим условиям региона и высоко декоративным группам растений и рекомендуются для расширения адаптивного регионального сортимента туи (Thuja L.) и широкого использования в озеленении на юге России.

ЧИСЛА ХРОМОСОМ THUJA OCCIDENTALIS (CUPRESSACEAE) В НАЦИОНАЛЬНОМ ДЕНДРОЛОГИЧЕСКОМ ПАРКЕ "СОФИЕВКА", УКРАИНА, "БОТАНИЧЕСКИЙ ЖУРНАЛ"

2014 ◽  
pp. 941-944 ◽  
Author(s):  
Т.С. СЕДЕЛЬНИКОВА ◽  
А.В. ПИМЕНОВ ◽  
В.Н. ГРАБОВОЙ ◽  
В.А. ПОНОМАРЕНКО
Keyword(s):  
Thuja Occidentalis

Приведены данные по числам хромосом 4 культиваров туи западной, различающихся рядом морфологических признаков, при интродукции в Национальном дендрологическом парке «Софиевка» НАН Украины.

Drought signals inferred from ring-width and stable carbon isotope chronologies from Thuja occidentalis trees growing at their northwestern distribution limit, central Canada

2012 ◽  
Vol 42 (3) ◽  
pp. 517-531 ◽  
Author(s):  
Robert Au ◽  
Jacques C. Tardif
Keyword(s):  
Tree Ring ◽  
Tree Rings ◽  
Stable Carbon Isotopes ◽  
Stable Carbon Isotope ◽  
Ring Width ◽  
Ring Formation ◽  
Moisture Regime ◽  
Stable Carbon ◽  
Thuja Occidentalis ◽  
Central Canada

Stable carbon isotopes (δ13C) fixed in tree rings are dependent upon environmental conditions. Old northern white-cedar ( Thuja occidentalis L.) trees were sampled at their northwestern limit of distribution in central Canada. The objectives of the study were (i) to investigate the association between tree-ring δ13C values and radial growth in addition to the response of these variables to climate, (ii) to assess site differences between two sites varying in moisture regime, and (iii) to compare tree-ring δ13C of T. occidentalis with that of other boreal tree species growing at the northern limit of their distribution in central Canada. Over 2500 tree rings comprised of 15 T. occidentalis trees were analyzed for δ13C. Annually resolved δ13C (1650–2006) and ring-width (1542–2006) chronologies were developed. During the year of ring formation, ring width was associated with spring and early-summer conditions, whereas δ13C was more indicative of overall summer conditions. However, compared with δ13C values, ring width was more often associated with climate conditions in the year prior to ring formation. Conditions conducive to moisture stress were important for both parameters. Although ring width and δ13C corresponded to the drought intervals of the 1790s, 1840s, 1890s, 1930s, and 1960–1970, ring width may be more responsive to prolonged drought than δ13C. Tree-ring δ13C could, however, provide important information regarding physiological adaptations to drought.

Extension and Longitudinal Growth During the Development of Red Pine Root Systems

1975 ◽  
Vol 5 (1) ◽  
pp. 109-121 ◽  
Author(s):  
D. C. F. Fayle
Keyword(s):  
Root System ◽  
Root Systems ◽  
Red Pine ◽  
Longitudinal Growth ◽  
Rooting Depth ◽  
Soil Conditions ◽  
Moisture Availability ◽  
Below Ground

Extension of the root system and stem during the first 30 years of growth of plantation-grown red pine (Pinusresinosa Ait.) on four sites was deduced by root and stem analyses. Maximum rooting depth was reached in the first decade and maximum horizontal extension of roots was virtually complete between years 15 and 20. The main horizontal roots of red pine seldom exceed 11 m in length. Elongation of vertical and horizontal roots was examined in relation to moisture availability and some physical soil conditions. The changing relations within the tree in lineal dimensions and annual elongation of the roots and stem are illustrated. The development of intertree competition above and below ground is considered.

Sign in / Sign up

Export Citation Format

Share Document