DOI: 10.1016/j.foreco.2016.08.041
Scopus记录号: 2-s2.0-84983486416
论文题名: Intra-genotypic competition of Eucalyptus clones generated by environmental heterogeneity can optimize productivity in forest stands
作者: Resende R.T. ; Marcatti G.E. ; Pinto D.S. ; Takahashi E.K. ; Cruz C.D. ; Resende M.D.V.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 380 起始页码: 50
结束页码: 58
语种: 英语
英文关键词: Clonal competition
; Forest breeding
; Mixed models
; Plant spacing
; Stand productivity
Scopus关键词: Agriculture
; Autocorrelation
; Cloning
; Design of experiments
; Productivity
; Regression analysis
; Autocorrelation parameters
; Environmental conditions
; Environmental heterogeneity
; Forest breeding
; Mixed models
; Plant spacing
; Spatial autocorrelations
; Stand productivities
; Forestry
; biological production
; clone
; environmental effect
; evergreen tree
; forest ecosystem
; genotype-environment interaction
; growth response
; heterogeneity
; intraspecific competition
; plantation forestry
; population density
; productivity
; selective breeding
; Eucalyptus
英文摘要: The growth structure of Eucalyptus plantations is the result of site environment, genetic material, and different types of interaction between neighboring plants. It is well known that sites that are more homogeneous result in greater forest productivity. However, additional factors inherent in the micro-environment or the quality of cuttings can lead to heterogeneous clonal biomass at the end of the rotation cycle. This study of the growth patterns in commercial stands of Eucalyptus clones had two aims: (i) to determine whether environmental heterogeneity causes competition among genetically identical individuals and (ii) to validate the occurrence of intra-genotypic competition, revealing the potential relationship with forest productivity. The present study was developed based on two linear mixed models: a non-genetic model, which accounts for spatial autocorrelation and is used to estimate the effects of competition between neighboring trees into the single clone plots; and a genetic model to infer the nature of the clonal competition. Three hundred and six square plots containing one hundred plants from eight experiments using a randomized block design, with three replications, were evaluated. The experiments were positioned in different environmental conditions by combining two different plant spacings and two altitude elevations. Using the path analysis procedure, we verified that there were significant direct effects of competition according to the proximity of the trees in the plot. In addition, trees that were more distant caused indirect effects of competition through nearby trees. Stands with uniform growth conditions (measured by residual autocorrelation parameters) actually caused higher productivity. The results from the genetic correlations of intra-genotypic competition and productivity showed that the less competitive clones were always less productive, regardless of the experimental condition. The more competitively aggressive clones could optimize their productivity when planted in sites with high residual levels, reaching productivities similar to those of homogeneous stands. This suggests that the implementation of certain silviculture techniques, seeking to increase site uniformity, is less relevant to these clones. The selection and use of these clones might be useful for large companies, because they offer the opportunity to achieve high productivity, and for smaller producers who do not have access to the silvicultural quality used by large companies. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64711
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Statistics, Universidade Federal de Viçosa (UFV), Campus Universitário, 36570-900 ViçosaMG, Brazil; Department of Forestry, UFV, Campus Universitário, 36570-900 ViçosaMG, Brazil; Department of Plant Science, Universidade Federal Rural da Amazônia (UFRA), 68625-970 ParagominasPA, Brazil; Celulose Nipo-Brasileira (CENIBRA S.A.), 35196-972 Belo OrienteMG, Brazil; Brazilian Agricultural Research Corporation (Forest EMBRAPA), Km 111, Estrada da Ribeira, Colombo, PR, Brazil
Recommended Citation:
Resende R.T.,Marcatti G.E.,Pinto D.S.,et al. Intra-genotypic competition of Eucalyptus clones generated by environmental heterogeneity can optimize productivity in forest stands[J]. Forest Ecology and Management,2016-01-01,380