Journal name: Metsanduslikud uurimused / Publication year rev: 7989-2011 / Source: 2011 v.52 no.-1

Author:: Tiit Maaten; Malle Kurm
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 72-87
ISSN:: 1736-8723
Subject:: forest trees; forests; genes; in situ conservation; international agreements; provenance; silvicultural systems; transgenic plants; tree breeding; Estonia
Abstract:: ... Conservation and management as well research on forest genetic resources are getting more important around the world including Europe and Estonia. There are two main cornerstones by the increasing relevance: international agreements and rapidly developed methods for investigation of genetic structure and diversity by different organisms, including forest trees. In light of given background an over ...
DOI:: 10.2478/v10132-011-0084-8
: https://doi.org/10.2478/v10132-011-0084-8

Author:: Mait Lang
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 5-17
ISSN:: 1736-8723
Subject:: Betula pendula; Picea abies; Pinus sylvestris; canopy; lidar; sand; stand structure; trees; Estonia
Abstract:: ... Tests were carried out in mature Scots pine, Norway spruce and Silver birch stands at Järvselja, Estonia, to estimate canopy cover (K) and crown cover (L) from airborne lidar data. Independent estimates Kc and Lc for K and L were calculated from the Cajanus tube readings made on the ground at 1.3 m height. Lidar data based cover estimates depended on the inclusion of different order returns signif ...
DOI:: 10.2478/v10132-011-0079-5
: https://doi.org/10.2478/v10132-011-0079-5

Author:: Karin Kikamägi; Katri Ots
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 60-71
ISSN:: 1736-8723
Subject:: Betula pendula; Pinus sylvestris; biofuels; conifer needles; growing season; leaf area; pH; peat; peatlands; root crown; seedlings; trees; wood; wood ash
Abstract:: ... The aim of the study was to investigate the effect of fertilization on the growth of Silver birch Betula pendula Roth and Scots pine Pinus sylvestris L. seedlings on a cutaway peatland (Ulila, 58°22'N, 26°26'E). Five treatments were established: wood ash (10 000 and 5000 kg/ha), peat and wood ash mixture (10 000 and 5000 kg/ha) and control (unfertilized field). Results of analysis showed that the ...
DOI:: 10.2478/v10132-011-0083-9
: https://doi.org/10.2478/v10132-011-0083-9

Author:: Henn Pärn; Malle Mandre; Katri Ots; Jaan Klõšeiko; Aljona Lukjanova; Tatjana Kuznetsova
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 40-59
ISSN:: 1736-8723
Subject:: manganese; acidity; peat; wood ash; vegetation cover; trees; wood quality; forest soils; nutrients; phosphorus; upland forests; sulfur; radionuclides; mineral fertilizers; fertilizer application; iron; cesium; cadmium; peatlands; forestry; combustion; forest ecosystems; sodium; barium; harvesting; copper; mineral soils; calcium; shifting cultivation; boron; potassium; humus; microbial activity; tree growth; mercury; silicon; wood; peat soils; zinc; magnesium; ground vegetation; aluminum; biofuels; pH; alkalinity; environmental impact
Abstract:: ... Negative environmental impacts of fossil fuel combustion have increased the use of biomass for energy production. As a consequence of the increased use of biofuels, the production of ashes will increase greatly in the near future. Because of relatively high contents of plant nutrients, biofuel ashes can be recycled as mineral fertilisers to compensate for the loss of nutrients resulting from tree ...
DOI:: 10.2478/v10132-011-0082-x
: https://doi.org/10.2478/v10132-011-0082-x

Author:: Allar Padari; Risto Mitt; Linnar Pärn; Peeter Muiste
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 30-39
ISSN:: 1736-8723
Subject:: Vaccinium myrtillus; bulk density; forests; greenhouse gas emissions; harvesting; linear models; plant residues; renewable energy sources; stand characteristics
Abstract:: ... To limit the emissions of greenhouse gases the wider utilization of renewable energy is mandatory for all EU countries. The aim of the present study was to estimate the potential quantities of harvesting residues as a source of renewable fuel. The sample plots were selected to cover the majority of site types. Based on the characteristics of the stand and the weight of the harvesting residues from ...
DOI:: 10.2478/v10132-011-0081-y
: https://doi.org/10.2478/v10132-011-0081-y

Author:: Veiko Uri; Jürgen Aosaar; Mats Varik; Merit Kund
Source:: Metsanduslikud uurimused 2011 v.52 no.-1 pp. 18-29
ISSN:: 1736-8723
Subject:: Alnus; Betula pendula; aboveground biomass; afforestation; agricultural land; biomass production; hybrids; trees; Estonia
Abstract:: ... Several studies about stands growing on abandoned agricultural lands are induced by extensive afforestation of agricultural lands and more intensive use of biomass. Overview of above-ground biomass production of grey alder, hybrid alder and silver birch young stands growing on former agricultural areas are presented in current paper. The results of 16- and 6-year period of alders and silver birch ...
DOI:: 10.2478/v10132-011-0080-z
: https://doi.org/10.2478/v10132-011-0080-z

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