Growth and breeding of aspen in Russia

Tsarev, Anatoly

doi:10.1515/sg-2013-0020

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Territorially scattered timber resources is one of the reasons why, despite the well-known qualities of aspen wood (white-colored, lightweight, homogenous, and easy to machine), its main uses are pulping and energy (Heräjärvi 2009a). Although European aspen is capable of regenerating by root suckers, and natural stands are highly productive (Tsarev 2013), indicating the potential of this native tree species for coppice, the hybrid aspen (Populus tremuloides × P. tremula) is outcompeting the native species in the production of woody biomass in short rotation forestry (Tullus et al 2012;Smilga et al 2015). These are the main reasons why European aspen plays only a minor role in forestry in many European countries, as previously ascertained by Rock (2007) and Worrell (1995b).…”

Section: Introductionmentioning

confidence: 99%

Mapping of basic density within European aspen stems in Latvia

Liepiņš¹,

Ivanovs²,

Lazdiņš³

et al. 2017

Silva Fenn.

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Highlights• Stem bark is significantly denser than wood and does not follow the same variation patterns along the stem.• The main trend in radial variation of wood density was the increase from pith to bark.• There is a weak relationship between mean basic density and commonly measured stand and tree parameters. AbstractThe objective of this study was to investigate basic density and its within-stem variation by studying 84 European aspen stems from 28 forest stands in Latvia. The studied forest stands covered all age classes from young stands to matured forests in representative growth conditions of European aspen. The densities of 2722 wood and 1022 bark specimens were measured from the sampled trees. Only the knot-free wood specimens without obvious wood defects were chosen for analyses. A map of basic density summarizing its radial and axial variations was constructed to show species-specific, within-stem variability and the relationships between density and tree and stand variables were examined. Stem wood and bark of the European aspen show different patterns of basic density variation along the tree stem. Wood density increases from pith to bark up to certain dimensions and shows a slight decrease afterwards. The weighted basic density of bark (446 ± 39.6 kg m -3 ) was higher than stem wood density (393 ± 30.4 kg m -3 ). Our results suggest that wood and bark density measurements obtained at breast height can be used for reliable estimation of the densities of whole-tree stem components, while tree parameters such as diameter at breast height (DBH), tree height and social status or stand parameters, including number of trees, basal area and age, are weak predictors in this context.

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Section: Introductionmentioning

confidence: 99%

Mapping of basic density within European aspen stems in Latvia

Liepiņš¹,

Ivanovs²,

Lazdiņš³

et al. 2017

Silva Fenn.

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show abstract

“…At the same time, the difference between the average trunk volume of the best families of intraspecific hybrid (P. tremula X 2 × P. tremula local-0.50 m 3 ) and interspecific hybrid (P. tremuloides × P. tremula local-0.42 m 3 ) was 19 % in favor of the intraspecific crossing (A. Tsarev, 2013a).…”

Section: Discussionmentioning

confidence: 93%

Aspen hybridization: Parents’ compatibility and seedlings’ growth

et al. 2018

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First results of new trembling aspen (Populus tremula L.) special factorial crosses are presented. At first, productive parent trees were selected: five maternal and five paternal trees without symptoms of heart rot and one tree with fruiting bodies of this fungal attack. The results of phenotypic and genotypic analyses of parent trees, their compatibility, and growth performance are presented. The analysis of the hybrid seedlings’ survival and their growth performance on open ground are shown. Estimates of general and specific combining abilities of the parent trees were carried out and potentially best hybrid families and seedlings were selected.

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Hybridization of Poplars in the Central Chernozem Region of Russia

2016

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Hybridization offers huge potential in domesticating species. Poplars are important for wood production and also ornamental uses. Only two poplar parents can generate by hybridization more than 500,000 different offspring phenotypes. The article reviews some international results and presents some Russian results of poplar hybridization, emphasizing the Central Chernozem Region of the European part of Russia. During 60 years 736 crosses were realized, resulting in 54,000 hybrid seedlings. In different field trials 243 superior clones were selected. For practical operations twelve cultivars of the most productive and frost resistant poplar hybrids were selected. Three of them are now approved as varieties by the state registration authorities. In order to mitigate the risks from unforeseen disease, injury or other adverse factors in defined environments several cultivars with close economic value but with different genetic composition should be available.

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Growth and breeding of aspen in Russia

Cited by 3 publications

References 6 publications

Mapping of basic density within European aspen stems in Latvia

Mapping of basic density within European aspen stems in Latvia

Aspen hybridization: Parents’ compatibility and seedlings’ growth

Hybridization of Poplars in the Central Chernozem Region of Russia

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