scholarly journals The demand of hybrid aspen (Populus tremula × P. tremuloides) on site conditions for a successful establishment on forest land

Silva Fennica ◽  
2018 ◽  
Vol 52 (5) ◽  
Author(s):  
Karin Hjelm ◽  
Lars Rytter
Keyword(s):  
Agricultural Land ◽  
Site Preparation ◽  
Populus Tremula ◽  
Deciduous Tree ◽  
Forest Site ◽  
Site Conditions ◽  
Hybrid Aspen ◽  
Forest Land ◽  
Preparation Methods ◽  
Patch Scarification

Hybrid aspen ( L. × Michx.) is a deciduous tree species suitable for producing large amounts of renewable biomass during short rotations. Its potential under North European conditions could be largely extended if not only agricultural land but also forest land was used for cultivation. Unfortunately, the knowledge of appropriate forest site conditions and effects of site preparation methods on hybrid aspen establishment is limited. In this paper, two studies that explore these questions are presented. In the first study, the sensitivity to acid soils was tested under greenhouse conditions in two type of soils: a) peat soil limed to certain pH levels (3.4–5.7) and b) collected forest soils where pH varied from 3.9 to 5.3. The lowest pH level resulted in reduced growth, elsewhere no significant differences were found. The second study was applied in the field and investigated the effect of four site preparation methods on survival and growth. The methods were: 1) control with no site preparation, 2) patch scarification, 3) mounding and 4) soil inversion. While no differences were found for survival, mounding was generally the method with the highest growth and patch scarification was least successful. The result was probably an effect of good soil aeration and less competition from vegetation after mounding. The field study also revealed clonal differences in growth performance, which stresses the importance of clone selection prior to planting. The results of these studies indicate that hybrid aspen is less sensitive to variation in pH and site preparation methods compared with other poplar species, as have been found in similar studies.Populus tremulaP. tremuloides

scholarly journals Basic Theory and Methods of Afforestation

Silviculture ◽  
2021 ◽  
Author(s):  
Jie Duan ◽  
Dilnur Abduwali
Keyword(s):  
Site Preparation ◽  
Site Classification ◽  
Forest Site ◽  
Site Conditions ◽  
Site Factors ◽  
Land Preparation ◽  
Forest Sites ◽  
Survival And Growth ◽  
Healthy Growth ◽  
The Right

Afforestation is an important practice in silviculture. This chapter outlines the forest site, site preparation, selection of afforestation materials in the process of afforestation. The life cycle of forests is very long, and it is difficult to change them once afforested. Therefore, the forest site must be analyzed in depth before afforestation to maintain the success of afforestation and the healthy growth of forests later. Forest sites are mainly affected by environmental and human activities. To facilitate afforestation, it is necessary to evaluate and classify the forest site factors and achieve a suitable species planted on the right site. Site preparation is also based on site classification. It is usually carried out after determining the type of afforestation land, divided into mechanical land preparation and chemical methods. An essential task of site preparation is to maintain soil moisture and promote seedlings’ survival and growth. Afforestation materials are mainly divided into three categories: seed, seedling, and cutting. The choice of these three types of afforestation materials and methods is related to site conditions, tree species, and age.

scholarly journals Four Site-Preparation Techniques for Regenerating Pine-Hardwood Mixtures in the Piedmont

1997 ◽  
Vol 21 (3) ◽  
pp. 116-122 ◽  
Author(s):  
Thomas A. Waldrop
Keyword(s):  
Pinus Taeda ◽  
Loblolly Pine ◽  
Height Growth ◽  
Site Preparation ◽  
Site Conditions ◽  
Growing Seasons ◽  
Southern Appalachian ◽  
Medium Quality ◽  
Pinus Taeda L ◽  
Preparation Techniques

Abstract Four variations of the fell-and-burn technique, a system developed to produce mixed pine-hardwood stands in the Southern Appalachian Mountains, were compared in the Piedmont region. All variations of this technique successfully improved the commercial value of low-quality hardwood stands by introducing a pine component. After six growing seasons, loblolly pine (Pinus taeda L.) occupied the dominant crown position and oaks the codominant position in fell-and-burn treated stands on poor to medium quality sites. The precise timing of felling residual stems, as prescribed by the fell-and-burn technique, may be flexible because winter and spring felling produced similar results. Although summer site preparation burns reduced hardwood height growth by reducing the length of the first growing season, they did not improve pine survival or growth. Pines were as tall as hardwoods within four growing seasons in burned plots and within six growing seasons in unburned plots. Additional research is needed to determine the level or intensity of site preparation needed to establish pine-hardwood mixtures over a range of site conditions. South. J. Appl. For. 21(3):116-122.

ENHANCED DISEASE SUSCEPTIBILITY 1 (EDS1) affects development, photosynthesis, and hormonal homeostasis in hybrid aspen ( Populus tremula L. ×  P. tremuloides )

2018 ◽  
Vol 226 ◽  
pp. 91-102 ◽  
Author(s):  
Maciej Jerzy Bernacki ◽  
Weronika Czarnocka ◽  
Damian Witoń ◽  
Anna Rusaczonek ◽  
Magdalena Szechyńska-Hebda ◽  
...  
Keyword(s):  
Disease Susceptibility ◽  
Populus Tremula ◽  
Hybrid Aspen

scholarly journals Four-year-performance of oak and pine seedlings following mechanical site preparation with lightweight excavators

Silva Fennica ◽  
2021 ◽  
Vol 55 (2) ◽  
Author(s):  
Noé Dumas ◽  
Mathieu Dassot ◽  
Jonathan Pitaud ◽  
Jérôme Piat ◽  
Lucie Arnaudet ◽  
...  
Keyword(s):  
Vegetation Cover ◽  
Untreated Control ◽  
Seedling Survival ◽  
Pinus Nigra ◽  
Quercus Petraea ◽  
Site Preparation ◽  
Pteridium Aquilinum ◽  
Preparation Methods ◽  
Basal Diameter ◽  
Mechanical Site Preparation

Mechanical site preparation methods that used tools mounted on lightweight excavators and that provided localised intensive preparation were tested in eight experimental sites across France where the vegetation was dominated either by (L.) Moench or (L.) Kuhn. Two lightweight tools (Deep Scarifier: DS; Deep Scarifier followed by Multifunction Subsoiler: DS+MS) were tested in pine ( L., var. (Loudon) Hyl. or Aiton) and oak ( (Matt.) Liebl. or  L.) plantations. Regional methods commonly used locally (herbicide, disk harrow, mouldboard plow) and experimental methods (repeated herbicide application; untreated control) were used as references in the experiments. Neighbouring vegetation cover, seedling survival, height and basal diameter were assessed over three to five years after plantation. For pines growing in , seedling diameter after four years was 37% and 98% greater in DS and DS+MS, respectively, than in the untreated control. For pines growing in , it was 62% and 107% greater in the same treatments. For oak, diameter was only 4% and 15% greater in , and 13% and 25% greater in , in the same treatments. For pines, the survival rate after four years was 26% and 32% higher in and 64% and 70% higher in , in the same treatments. For oak, it was 3% and 29% higher in and 37% and 31% higher in . Herbicide, when applied for three or four years after planting, provided the best growth performances for pines growing in and and for oaks growing in . For these species and site combinations, DS+MS and DS treatments reduced the neighbouring vegetation cover for one to four years following site preparation.Molinia caeruleaPteridium aquilinumPinus sylvestrisPinus nigracorsicanaPinus pinasterQuercus petraeaQuercus roburM. caeruleaP. aquilinumM. caeruleaP. aquilinumM. caeruleaP. aquilinumM. caeruleaP. aquilinumM. caerulea P. aquilinumP. aquilinum

Pre-industrial landscape of the Jeseníky region as a natural and cultural heritage

2020 ◽  
Author(s):  
Jaromír Kolejka ◽  
Eva Nováková
Keyword(s):  
Czech Republic ◽  
Industrial Revolution ◽  
Agricultural Land ◽  
Local Administration ◽  
Economic Pressure ◽  
Forest Land ◽  
The Czech Republic ◽  
Industrial Landscape ◽  
The Subject ◽  
State Protection

Small parcels of agricultural land are rare in the present landscape of Czech Republic and become the subject of interests of the state protection of the nature, the landscape and the environment. At the same time, such areas represent interesting subjects for the local administration as attractive tourist object. In the historical territory of Moravia (the eastern 1/3 of the Czech Republic), a regional inventory of areas with preserved ancient land use structure was carried out on all individual cadastral territories (focused not only on small parcels, but also on large aristocratic estates on agricultural and forest land originated before the main wave of industrial revolution Moravia, before 1850. The sites are still subjects to topic economic pressure on land consolidation. Their existence in the future is under threat and is decreasing every year both in number and size. The inventory results are presented on example of the Jeseníky region.

Current state and resilience of three main tree species in southern Germany with regard to drier and hotter weather conditions over the past 50 years

2021 ◽  
Author(s):  
Annette Debel ◽  
Achim Bräuning
Keyword(s):  
Tree Species ◽  
Summer Precipitation ◽  
Weather Conditions ◽  
Deciduous Tree ◽  
Response Analysis ◽  
Climate Modelling ◽  
Forest Site ◽  
Southern Germany ◽  
The Past ◽  
Current State

<p>Latest drought events and their already visible damage to trees highlight the crucial need to assess the current state and resilience of forest ecosystems in southern Germany. However, commonly applied dendroclimatic approaches rarely take into account, how weather patterns affecting trees are modified by topographic conditions. For this purpose, three main tree species were studied at three low mountain ranges and three corresponding basins in the topographically complex province of Bavaria (southeast Germany). A response analysis between climate proxies and tree-ring widths was used to investigate climate-growth relationships over the past 50 years of both coniferous and deciduous tree species at each forest site. Temporal stability of tree responses to climate was compared for two 25-year periods to detect possible modifications in climate-growth correlations. A pointer year analysis was also conducted to analyze tree response to climatic extreme events. The results showed that Scots pine (<em>Pinus sylvestris</em>) was the most vulnerable and least drought-resistant of the investigated tree species. Although Norway spruce (<em>Picea abies</em>) and European beech (<em>Fagus sylvatica</em>) benefited from an extended growing season at high elevation sites, they showed higher drought sensitivity over the past 25 years. Beech responses were rather inhomogeneous and even differed in the optimal precipitation period. However, lower correlation coefficients for summer precipitation at the driest site may indicate the ability of beech to adapt to less summer precipitation. Nevertheless, increasing drought frequency, as predicted, poses a serious threat to all studied tree species, including even the colder and more humid sites. Hence, to more accurately estimate risk potentials under future weather conditions, we will combine dendroclimatological results with climate modelling scenarios, particularly expected future frequencies of critical weather types on the local scale.</p>

Effect of soil physical properties on the long-term performance of planted Scots pine in Finnish Lapland

2010 ◽  
Vol 90 (3) ◽  
pp. 451-465 ◽  
Author(s):  
K. Mäkitalo ◽  
V. Alenius ◽  
J. Heiskanen ◽  
K. Mikkola
Keyword(s):  
Physical Properties ◽  
Water Content ◽  
Scots Pine ◽  
Soil Physical Properties ◽  
Height Growth ◽  
Site Preparation ◽  
Preparation Methods ◽  
Finnish Lapland

Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies L. Karst.) forests dominate in Finnish Lapland. This study examined the long-term effects of soil physical properties and conditions measured in intact intermediate areas, as well as site preparation, on the survival and height growth of planted pine on eight experimental sites, 25-27 yr after reforestation. On the four originally spruce-dominated sites, pine survival was the highest on sites with a high soil air-filled porosity (AFP) near saturation (at -1 kPa), a high van Genuchten parameter, and a low soil water content (SWC) in situ, and height growth was the fastest on sites with a high soil AFP in situ and a high van Genuchten parameter n, and on sites reaching a soil AFP of ca. 0.20 m3 m-3 at a high matric potential after saturation. Survival, but not mean height, was enhanced on the spruce sites by intensive site preparation methods such as ploughing instead of lighter site preparation methods. On the four originally pine-dominated sites, site preparation affected the mean height but not survival. The use of SWC as a sole criterion for sites suitable for pine reforestation was tested and found to be uncertain. Key words: Boreal forest soils, soil water content, air-filled porosity, van Genuchten function, site preparation, reforestation, Scots pine

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