Aboveground biomass distribution within trees and stands in thinned and fertilized Douglas-fir

Pang, P. C.; Barclay, Hugh J.; McCullough, Kenneth M.

doi:10.1139/x86-080

Cited by 24 publications

(8 citation statements)

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“…Aboveground biomass of the 47-year-old Douglas-fir/western hemlock stand at Fall River, i.e., 407 Mg/ha in live trees, dead trees, and snags, greatly exceeded the average biomass reported from other studies in the Pacific Northwest (Bancalari and Perry 1987, Barclay et al 1986, Dice 1970, Heilman 1961, Swank 1960) for stands 22 to 52 years old. This result is consistent with the stand age, large stand basal area, and high site index at Fall River.…”

Section: Discussion-contrasting

confidence: 58%

The Fall River Long-Term Site Productivity study in coastal Washington: site characteristics, methods, and biomass and carbon and nitrogen stores before and after harvest.

Ares¹,

Terry²,

Piatek³

et al. 2007

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The Forest Service of the U.S. Department of Agriculture is dedicated to the principle of multiple use management of the Nation's forest resources for sustained yields of wood, water, forage, wildlife, and recreation. Through forestry research, cooperation with the States and private forest owners, and management of the National Forests and national grasslands, it strives-as directed by Congress-to provide increasingly greater service to a growing Nation.The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD).To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W. Washington, DC 20250-9410 or call (800) 795-3272 (voice) or (202)

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Section: Discussion-contrasting

confidence: 58%

The Fall River Long-Term Site Productivity study in coastal Washington: site characteristics, methods, and biomass and carbon and nitrogen stores before and after harvest.

Ares¹,

Terry²,

Piatek³

et al. 2007

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“…Our models averaged in R adj 2 = 0.866 (0.744-0.918). Leaf or needle biomass might be stronger affected by other stand characteristics like social status in the stand according to Kraft (1884) or stand density (Barclay et al 1986;Keane and Weetman 1987;Satoo and Madgwick 1982). Also leaves are more susceptible to weather conditions.…”

Section: Predictive Power Of the Models And Model Evaluationmentioning

confidence: 99%

Biomass functions for the two alien tree species Prunus serotina Ehrh. and Robinia pseudoacacia L. in floodplain forests of Northern Italy

et al. 2012

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As one cause for biodiversity loss, invasive alien species are a worldwide threat. In forests, however, invasive tree species can also have an enormous biomass potential which can be harvested while taking measures against the species. Allometric equations help estimating the biomass but are often only available for the native range of the species. This lack on information complicates the management of invaded stands, and the equations presented here should help fill this gap. The above-ground biomass for single trees of black cherry (Prunus serotina Ehrh.) and black locust (Robinia pseudoacacia L.) in Ticino/Italy was estimated with differing explanatory variables as total, stem, crown, and leaf biomass. Regression equations of P. serotina were compared with equations from North America. The methods to derive biomass estimates from fresh weight and volumetric measurements in combination with wood densities were critically examined. The biomass could be estimated well by using ''diameter'' as explanatory variable. The productivity of P. serotina was lower here compared to its range of origin. Biomass estimates from volumetric measurements combined with the truncated cone formula have lead to systematic overestimations. Also the use of volumetric measurements combined with wood density measurements has overestimated comparable estimates from fresh weight measurements.

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“…Este efecto también ha sido registrado en otras especies: en Pseudotsuga menziesii (Mirb.) Franco por Barclay et al (1986), en N. dombeyi por Gajardo (2005) y en P. radiata por Rodríguez (2002). Ello pudiera ser atribuible a una mayor luminosidad disponible para el árbol, provocando un aumento de follaje especialmente en la base de la copa, que permite que las ramas basales continúen creciendo (Medhurst y Beadle 2001).…”

Section: Discussionunclassified

“…Al comparar los tratamientos raleados (800 y 400 árboles ha -1 ) con los no raleados (1.100 árboles ha -1 ) se aprecia que los raleados presentan mayor IAF. Similar tendencia como respuesta al raleo ha sido observada en Pinus taeda L. (Guillespie et al 1994) y en Pseudotsuga menziesii (Barclay et al 1986), la que pudiera ser atribuible a una mayor luminosidad disponible por árbol, que provoca un incremento del tamaño de la copa, como también la modificación del estatus hídrico y nutricional del suelo. Al respecto, Barclay et al (1986) señalan que el desarrollo de follaje depende principalmente de la penetración de luz y de la disponibilidad de nutrientes y agua, lo cual explicaría la mayor superficie foliar de los árboles presentes en tratamientos raleados.…”

Section: Discussionunclassified

Efecto de poda y raleo en el área foliar de Eucalyptus nitens

Muñoz¹,

Espinosa²,

Cancino³

et al. 2008

Bosque (Valdivia)

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SUMMARYEucalyptus nitens is an important commercial fast growing species planted mainly in Chile and Australia (Tasmania). In Chile there are not previously published studies quantifying leaf area in adult forest plantations of E. nitens. This study presents the effect of pruning and thinning intensities, applied at age 6 in a E. nitens stand, and on the amount of leaf area sustained at 15 years old. A factorial experiment considering pruning (0 m, 3.5 m and 7 m height) and stocking (1,100, 800 and 400 trees ha -1 ) was established in 1989 near Los Álamos town in central Chile. Using the average tree method, 27 trees were sampled destructively for biomass and leaf area assessments. Projected leaf area, leaf area index, and specific leaf area were estimated for each sampled tree. The results indicate that projected leaf area and leaf area index reached a maximum of 64.7 m 2 tree -1 at 400 trees ha -1 stocking and 3.48 m 2 m -2 at 800 trees ha -1 stocking respectively. Specific leaf area was higher (43.2 cm 2 g -1 ) at higher stocking (1,100 trees ha -1 ). For all treatments projected leaf area and leaf area index were higher in the central section of the crown. Allometric relationships were obtained using diameter at the base of the live crown and stump diameter. The information presented in this study allows giving a more functional explanation of the horizontal and vertical behavior of the leaf area, at different stocking.Key words: Eucalyptus nitens, leaf area, pruning, thinning. RESUMENEucalyptus nitens es una especie de rápido crecimiento plantada principalmente en Chile y Australia (Tasmania). En Chile, no hay estudios publicados de área foliar en bosques adultos de E. nitens. Se investigó el efecto de la poda y el raleo en el área foliar de E. nitens. Los datos utilizados provienen de una plantación de 15 años de edad, luego de nueve años de establecido el ensayo. El estudio fue realizado en una plantación efectuada el año 1989, cercana a la localidad de Los Álamos, zona central de Chile, según un arreglo factorial de dos factores: intensidad de raleo y severidad de poda. Utilizando el método del árbol medio, se seleccionaron 27 árboles que posteriormente fueron volteados. Con las mediciones realizadas se obtuvo el área foliar proyectada, índice de área foliar y área foliar específica. El análisis de varianza evidenció un efecto significativo del raleo sobre el área foliar. El área foliar proyectada e índice de área foliar es máxima en los tratamientos de densidad 400 árboles ha -1 (64,7 m 2 árbol -1 ) y en tratamientos de densidad 800 árboles ha -1 (3,48 m 2 m -2 ), respectivamente. El área foliar específica es mayor en tratamientos de densidad 1.100 árboles ha -1 (43,2 cm 2 g -1 ). El área foliar proyectada e índice de área foliar se concentran en la sección central de la copa. Los modelos alométricos determinados utilizan como variable predictora el diámetro en la base de la copa viva y el diámetro de tocón. La información presentada en el estudio permite dar una explicación más funcional del comportami...

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Aboveground biomass distribution within trees and stands in thinned and fertilized Douglas-fir

Cited by 24 publications

References 0 publications

The Fall River Long-Term Site Productivity study in coastal Washington: site characteristics, methods, and biomass and carbon and nitrogen stores before and after harvest.

The Fall River Long-Term Site Productivity study in coastal Washington: site characteristics, methods, and biomass and carbon and nitrogen stores before and after harvest.

Biomass functions for the two alien tree species Prunus serotina Ehrh. and Robinia pseudoacacia L. in floodplain forests of Northern Italy

Efecto de poda y raleo en el área foliar de Eucalyptus nitens

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