Applications of the crown diameter–stem diameter relationship for different species of broadleaved trees

Hemery, G. E.; Savill, P.; Pryor, Simon

doi:10.1016/j.foreco.2005.05.016

Cited by 149 publications

(122 citation statements)

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“…The slope for a relationship between crown volume and basal area (see Fig. 4) is the same for all three pruning systems, which confirms the hypothesis of Hemery et al (2005). But pruning has shifted pruned trees to the left on the horizontal axis, i.e.…”

Section: Resultssupporting

confidence: 78%

“…However, it is believed that the relationship between these two parameters is very close to a linear one with an r 2 value higher than 0.8 (Hemery et al 2005). In fact, the true relationship between crown diameter and stem diameter may be sigmoid due to the distortion of the line at the lower end because tree diameter is measured at breast height and due to the possible depression of the upper end due to senility, but in a juvenile phase these irregularities could be neglected.…”

mentioning

confidence: 98%

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Growth reaction of young wild cherry (Prunus aviumL.) trees to pruning

Kupka¹

2007

J. For. Sci.

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ABSTRACT:A large crown is one of the most important prerequisites for the good growth of a tree and therefore the crown could be called an engine of increment. The care for a large crown brings a decrease in the bole value at the same time as it makes large branches and later knots on it. Pruning is a possible solution of these two contradictions. Young wild cherry trees were pruned in three different ways: (i) half of the crown left, (ii) one quarter of the crown left and (iii) control, i.e. no pruning. The results show that height growth was not influenced by pruning while diameter growth was significantly affected. The crown reduction to a half means 10% less in diameter growth within a 5-year period after pruning. The crown reduction to one quarter of the crown means only two thirds of 'full' diameter growth on the control plot. The data suggest that the pruning of young wild cherry trees should be done moderately (more than a half of the crown should be left) and pruning should be done when the bottom part of the crown is in the shadow zone of the crown layer, not earlier.

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Section: Resultssupporting

confidence: 78%

mentioning

confidence: 98%

Growth reaction of young wild cherry (Prunus aviumL.) trees to pruning

Kupka¹

2007

J. For. Sci.

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“…On a stand basis, it serves to evaluate crown closure, which is on the one hand a general competition measure, and on the other an important measure of habitat quality (CONDÉS; STERBA, 2005) Like in the present work, reductions in stem diameter (Table 4) and crown diameter (Table 5) were also observed in other studies (HUMMEL, 2000;MAKINEN;HEIN, 2006;RONDON, 2006). Forest trees usually exhibit a significant relationship between their crown diameters and stem diameters (HEMERY et al, 2005). The possible applications and uses of a knowledge of this relationship include decisions on spacings, estimates of branchwood and fwelwood and uses in arboriculture (HEMERY et al, 2005).…”

Section: Discussionsupporting

confidence: 76%

“…Forest trees usually exhibit a significant relationship between their crown diameters and stem diameters (HEMERY et al, 2005). The possible applications and uses of a knowledge of this relationship include decisions on spacings, estimates of branchwood and fwelwood and uses in arboriculture (HEMERY et al, 2005). For example, It is possible to calculate the space occupied by the crown of each tree at any mean diameter, and assuming that no overlap occurs, the number of trees per hectare.…”

Section: Discussionmentioning

confidence: 99%

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Planting density and initial growth of two tree species adapted to the semi-arid region

et al. 2012

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-Planting densities influence several aspects of forest formation, including management practices, timber yield, quality, and extraction, and consequently its production costs. The objective of this study was to evaluate Mimosa caesalpiinifolia and Gliricidia sepium growth as a function of planting density (400, 600, 800, 1000, and 1200 plants ha -1 ) and plant age. The species were evaluated every 90 days for plant height (PH), crown diameter (CD) and root collar diameter (RCD) (10 cm above the ground), with the first evaluation performed at 90 days and the last at 720 days. When plants were one year of age and beyond, evaluations were conducted also for stem diameter at breast height (DBH) (1.30 m above the ground). A randomized block design with split-plots and three replicates was adopted. Species were assigned to plots, planting densities were assigned to subplots, and evaluation ages were assigned to subsubplots. The four traits in both species had their values decreased as planting density increased, but continually increased as plant age increased. For PH and RCD there was an alternation between species superiority, with gliricidia being superior to sabiá at some ages, while the opposite occurred at other ages. As to CD the species only differed in the last measurement, gliricidia being superior. With regard to DBH, gliricidia was superior starting from the second measurement. There was an effect of the species × ages interaction for the four traits and also an effect of the densities × ages interaction for CD and DBH.Keywords: Mimosa caesalpiinifolia Benth, Gliricidia sepium (Jacq.) Steud and Caatinga. DENSIDADE DE PLANTIO E CRESCIMENTO INICIAL DE DUAS ESPÉCIES ARBÓREAS ADAPTADAS AO SEMIÁRIDO ) e da idade da planta. As espécies foram avaliadas quanto à altura da planta (AP) e quanto aos diâmetros da copa (DCP) e do colo (DCO) (a 10 cm do nível do solo), de 90 em 90 dias, sendo a primeira avaliação realizada aos 90 dias e a última aos 720 dias. A partir de 1 ano de idade das plantas, foi avaliado também o diâmetro do caule à altura do peito (DAP) (a 1,30 m do nível do solo). Utilizou-se o delineamento de blocos casualizados com parcelas subsubdivididas e três repetições. As espécies foram aplicadas às parcelas, às densidades de plantio, às subparcelas, às idades de avaliação e às subsubparcelas. O aumento da densidade de plantio reduziu as quatro características estudadas nas duas espécies, que aumentaram continuamente com o incremento da idade das plantas. Na

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Quantification of enrichment processes in throughfall and stemflow in a mixed temperate forest

Grundmann,

Molnar,

Floriancic

2024

Hydrological Processes

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Forest ecosystems depend on throughfall and stemflow fluxes for both water and nutrient input. Spatial and temporal variability of throughfall and stemflow fluxes are large and differ between tree species. The nutrient fluxes that accompany throughfall and stemflow are affected by climate, precipitation intensity, the seasonality of dry deposition, and canopy exchange processes. The interdependence of these factors makes it challenging to quantify changes in throughfall and stemflow amounts as well as their nutrient content. Here, we provide observation‐based evidence from 3.5 years of data collection with 222 rainfall events, of the seasonal variability of throughfall and stemflow magnitude and ion concentrations under a beech (Fagus silvatica) and spruce (Picea abies) tree. Interception and canopy cover were seasonally variable, average annual interception was 53% below beech, 61% below spruce and 68% below young spruce canopies. Further, we assess seasonality of ionic nutrients such as NH4 and NO3 as well as Mg, Ca and K and their dependence on both dry deposition and canopy exchange. Throughfall and stemflow were enriched compared to precipitation, with large differences between ions and different months. Antecedent precipitation was a main control on throughfall and stemflow enrichment. We developed a conceptual model of the potential drivers of throughfall and stemflow enrichment based on our observations. While NH4 and NO3 enrichment are likely dominated by dry deposition and dew and fog accumulation, Mg, Ca and K were additionally affected by canopy exchange. Observation based studies such as this one are needed to understand precipitation and nutrient partitioning across forests, which enables the prediction of how changes in climate and forest composition will affect local hydrology and nutrient inputs into forest ecosystems.

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Applications of the crown diameter–stem diameter relationship for different species of broadleaved trees

Cited by 149 publications

References 5 publications

Growth reaction of young wild cherry (Prunus aviumL.) trees to pruning

Growth reaction of young wild cherry (Prunus aviumL.) trees to pruning

Planting density and initial growth of two tree species adapted to the semi-arid region

Quantification of enrichment processes in throughfall and stemflow in a mixed temperate forest

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