Influence of spacing regimes on the development of loblolly pine (Pinus taeda L.) in Southern Brazil

Abstract

experiment replicated seven times in the Coast and Cascade ranges of western Oregon, USA. This paper focuses on patterns observed 6 years following thinning. Early-seral cover was related to interactions among broad-scale variation in climate, intermediate-scale variation in insolation, and fi ne-scale neighborhood interactions. Late-seral species cover was related primarily to fi ne-scale neighborhood interactions. Furthermore, cross-scale interactions partially explained patterns of spatial correlation among neighboring subplots for early-seral species but not late-seral species. The authors hypothesize that residual patterns of spatial autocorrelation were related to unmeasured environmental variables for early-seral species and historical conditions (i.e., pre-treatment stand composition and structure) for late-seral species. Results suggest responses of understory plants to overstory density management depend on cross-scale interactions among environmental drivers, neighborhood-scale interactions, and species traits. Future demand for ecosystem services from terrestrial ecosystems from global power production scenarios to 2100: the role of forest biomass. Callesen, I.

Effect of Tree Spacing on Tree Level Volume Growth, Morphology, and Wood Properties in a 25-Year-Old Pinus banksiana Plantation in the Boreal Forest of Quebec

“…The higher individual stem volume was obtained in the widest plantation spacing, which is in line with the results of several other studies [4,13,47,54]. Light penetration in the plantation with the widest spacing lengthened the survival of the lower branches so that their diameter and axial growth continued over a longer time span [3,52,55].…”

“…In this study spacing had a significant impact on the DBH, but not on tree height. McEvoy [45] and Cardoso et al [4] already reported/stated that spacing did not affect the height growth of dominant stems in Pinus taeda, probably because the tree densities were too low to create a high enough level of light competition to impair height growth. In our study, stem height inside each plot varied less than 1.5 m due to the selection of only dominant trees, suggesting light accessibility was similar between trees.…”

“…At the stand level, numerous studies have already shown that stand volume increases with narrower plantation spacing, up to a certain level [2][3][4]. Past this threshold, narrower plantation spacing can decrease individual volume growth and increase tree mortality through excessive intraspecific competition [3,[5][6][7].…”

Phosphorus fractions in soil after successive crops of Pinus taeda L. without fertilization

“…Although, low P rates applied to Pinus proved promising in the soils of this region (MORO et al, 2014), the plant growth capacity in these P-poor soils in one of the areas of the world with highest Pinus productivity is surprising (CARDOSO et al, 2013). This fact reinforced the idea that the critical levels established for annual crops were not applied to perennial crops, such as Pinus taeda, and that new criteria are required, which are likely to be much lower.…”

Influência dos fatores edafoclimáticos na produtividade e na eficiência do uso dos recursos naturais do <i>Pinus taeda</i> L. sob distintos manejos no Sul do Brasil

“…Um dos principais fatores que direciona o tipo de manejo adotado para os plantios florestais é o retorno financeiro. A busca para encontrar o "manejo ideal" das áreas florestais, o qual considera não somente o ganho em produção de madeira mas também o custo-benefício do investimento em melhoramento genético e das atividades silviculturais, é tema de diversos estudos no manejo do Pinus taeda (CARTER;FORSTER, 2006;CARDOSO et al, 2013;CUBBAGE et al, 2007;MAESTRI;SANQUETTA, 1998 CARVALHO et al, 1999;DEDECEK et al, 2008;LASO GARICOITS, 1990;MORO et al, 2014;).…”