Response of radiata pine forests to residue management and fertilisation across a fertility gradient in New Zealand

Smith, C. T.; Lowe, A. T.; Skinner, M. F.; Beets, Peter N.; Schoenholtz, Stephen H.; Fang, Shengzuo

doi:10.1016/s0378-1127(00)00397-2

Cited by 82 publications

(78 citation statements)

References 5 publications

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“…Sin embargo, a medida que aumenta la etapa de desarrollo del rodal la productividad primaria neta y las tasas de acumulación de biomasa disminuyen debido al aumento en los procesos de respiración (Tateno et al, 2009). De esta forma, desde un punto de vista funcional los aclareos podrían provocar un efecto similar al de fertilización (Smith et al, 2000;Imbert, Blanco y Castillo, 2004) es decir, con la apertura del dosel disminuye la competencia entre especies y genera un aumento en la disponibilidad y recirculación de nutrimentos. El destino de estos nutrimentos podría ser hacia los diferentes componentes estructurales de los árboles que dependerá de los sus requerimientos fisiológicos en cada etapa de desarrollo del rodal (Vitousek y Reiners, 1975;Imbert et al, 2004).…”

Section: Discussionunclassified

Distribución de biomasa aérea en un bosque de Pinus patula bajo gestión forestal en Zacualtipán, Hidalgo, México

Chávez-Aguilar

Ángeles‐Pérez

Pérez-Suárez

et al. 2016

MYB

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La acumulación y distribución de biomasa hacia los componentes estructurales de los árboles es determinante en bosques manejados, tanto en términos de productividad maderable como en la reactivación de diversos procesos ecosistémicos. En el presente estudio se analizó el patrón de acumulación de biomasa aérea total (BAT) y su asignación hacia fuste, ramas, corteza y follaje en una cronosecuencia de un bosque de Pinus patula bajo aprovechamiento forestal en Zacualtipán, Hidalgo. Mediante el uso de ecuaciones alométricas se estimó la BAT y por componente estructural de los árboles en rodales con diferentes años después de la cosecha, en diferentes años de remedición (años 2005, 2008 y 2012). Se encontró que la BAT aumentó con el tiempo después de la cosecha, con diferencias estadísticas significativas (p < 0.0001) entre los rodales. El rodal de 30 años después de la cosecha presentó una biomasa aérea total (BAT) de 178.1 Mg ha-1, la cual resultó solo 20% menor a la observada en el rodal sin cosecha (AN), lo que indica que un bosque bajo aprovechamiento podría alcanzar niveles de biomasa aérea similares a la del AN, en un menor tiempo. La asignación de biomasa aérea (BA) presentó el siguiente orden: fuste> ramas> corteza> follaje. Esta asignación de BA fue favorecida hacia fuste como un producto maderable comercial, objetivo principal de estos bosques bajo producción. El patrón de asignación de BA entre los componentes estructurales de los árboles puede ser incorporado como base para el diseño de prácticas silvicuturales en los programas de manejo forestal y contribuir en la evaluación de la sustentabilidad de los bosques. Además, puede clarificar el papel de los bosques regenerados después de los aprovechamientos en la fijación y almacenamiento de bióxido de carbono atmosférico.

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Section: Discussionunclassified

Distribución de biomasa aérea en un bosque de Pinus patula bajo gestión forestal en Zacualtipán, Hidalgo, México

Chávez-Aguilar

Ángeles‐Pérez

Pérez-Suárez

et al. 2016

MYB

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“…In the same way, a system of allocative biomass equations was specified to allocate the estimated total residue biomass in Step 1 to the three subcomponents: res + ε 23 (13) where Y stump , Y branch and Y waste represent for stump, branch, and waste biomass in either fresh or dry weight in kg,Ŷ res represents the corresponding predicted total residue biomass in kg from any of the systems of additive equations, r 21 , r 22 , r 23 and r 24 are coefficients, ε 21 , ε 22 and ε 23 are the error terms.…”

Section: Allocative Biomass Equationsmentioning

confidence: 99%

“…On the other hand, estimates of harvest residue biomass enable the calculation of its energy content and other material properties during subsequent residue processing as an energy source [21]. More importantly, as demonstrated by Smith et al [22], Eisenbies et al [15] and Jones et al [23], these estimates provide the basis for the estimation of nutrient removals by collecting harvest residues for bioenergy and for the evaluation of the long-term implications of the removals on the nutrient budget, site productivity and the sustainability of plantations.…”

Section: Introductionmentioning

confidence: 99%

Product and Residue Biomass Equations for Individual Trees in Rotation Age Pinus radiata Stands under Three Thinning Regimes in New South Wales, Australia

Wang

Ximenes

et al. 2017

Forests

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Using data from 239 trees that were destructively sampled and completely weighed in the field, four systems of nonlinear additive equations were developed for the estimation of product and residue fresh and dry weight of individual trees in rotation age (28 to 42 years) Pinus radiata stands under three thinning regimes: unthinned (T0), one thinning (T1) and two thinnings (T2). To cater for all practical applications, the four systems of equations included diameter at breast height overbark (DBHOB) as the only independent variable or both DBHOB and total tree height as predictors either with or without the incorporation of dummy variables for stand types. For all systems, the property of additivity was guaranteed by placing constraints on the structural parameters of the system equations. The parameter estimates were obtained by the generalized methods of moments (GMM) following a comparison with weighted nonlinear seemingly unrelated regression (WNSUR). Based on the predicted values from the system that had DBHOB as the predictor and dummy variables for stand types, the percentage of total tree fresh weight accounted for by residues increased from 14.8% to 20.5%, from 15.6% to 22.2% and from 13.9% to 18.7% for trees in the T0, T1 and T2 stands, respectively, as DBHOB increased from 15 to 70 cm. The corresponding changes in the percentage of residue dry weight were from 15.1% to 16.1%, from 15.7% to 17.1% and from 14.9% to 15.8% for the three stand types. In addition, two systems of allocative equations were developed to allocate the predicted product and residue biomass to their respective subcomponents. The system of allocative equations for product biomass predicted that sawlogs with bark accounted for 83% to 85% of product fresh weight and 82% to 87% of product dry weight over the same range of DBHOB. The predicted allocation of total residue dry weight to stump changed little, between 12% and 13%, over the same diameter range, but it was slightly higher for trees with DBHOB between 30 and 45 cm. The predicted allocation of total residue biomass to branches increased from 18% to 65% in fresh weight and from 18% to 57% in dry weight and that to waste decreased from 71% to 27% in fresh weight and from 70% to 32% in dry weight as DBHOB increased from 15 to 70 cm. Among the five biomass components, prediction accuracy was the lowest for pulpwood and waste. The systems of additive and allocative biomass equations developed in this study provided the first example of how the two approaches could be used together for the estimation of total tree, major and sub-component biomass. They will provide forest management with an enhanced capacity to more accurately estimate product and residue biomass of rotation age trees and thus to include the production of biomass for renewable energy generation in their management systems for P. radiata plantations.

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“…Intensive pine plantation management such as practiced in New Zealand and elsewhere often includes fertilizer application and harvest residue retention to greatly increase soil nutrients in newly established second-rotation stands (Powers et al 2005;Smith et al 2000). A number of studies suggest that harvest residue retention increases soil organic matter in the light fraction (Huang et al 2011b), while N additions have no significant impact on the quantity of soil organic matter in the light fraction (Homann et al 2001;Huang et al 2011a;Neff et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Impacts of plantation forest management on soil organic matter quality

et al. 2011

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Purpose Light fraction soil organic matter is characterized by rapid mineralization due to the labile nature of its chemical constituents and to the lack of protection by soil colloids. The changes in the size of light fraction soil organic matter constituents are useful early indicators of management-related carbon (C) and nutrient changes. However, previous studies have not assessed the impacts of forest management practices on the chemical composition and sources of organic matter in the light fraction. The change in the chemistry of light fraction soil organic matter may significantly affect turnover rate of organic matter in the whole soil and soil fertility. The aim of this study was to assess how different forest management practices would affect the chemical composition of light fraction soil organic matter. Materials and methods Soils in 0-5, 5-15, and 15-25-cm layers were sampled in 2009 from a 19-year-old secondrotation Pinus radiata D. Don plantation. Soils were subject to four different treatment combinations (stem-only and whole-tree harvesting residue management treatments were combined with the presence or absence of nitrogen (N)). The soil was physically separated into two pools based on density fractionation. The C and N concentrations in the whole soil, light, and heavy fractions were determined. Light fraction soil organic matter in upper soil (0-5 cm depth) was analyzed by solid-state CPMAS 13 C NMR and GC/MS to determine the effects of forest management practices on the composition of organic C functional groups and the relative abundance of plant biomarkers. Results and discussion Long-term fertilization did not affect the C and N concentrations in the whole soil, light and heavy fractions, but increased the relative enrichment of alkyl C and alkyl-to-O-alkyl C ratio in the light fraction soil organic matter at the 0-5 cm depth, which may suggest increased decomposition of the light fraction. The relative abundance of cutin-derived compounds, which originate from the waxy coating of leaves, was greater in the light fraction soil organic matter in the fertilized plots than in the unfertilized plots. The relative abundance of major carbohydrates, labile components in the light fraction soil organic matter, decreased in the fertilized plots despite greater inputs from forest litter, compared to that in the unfertilized plots. Compared with whole-tree harvest plots, stem-only harvest plots had greater C concentrations in the light fraction soil organic matter at 0 to 25-cm layer and seemed to have a greater alkyl-to-O-alkyl ratio in the light fraction of soil organic matter, but the difference in alkyl-to-O-alkyl ratio due to harvest residue management was not significant (P<0.05) at the 0-5 cm depth. Post-harvesting residue management did not significantly affect functional organic C groups as analyzed by CPMAS 13 C NMR, or the relative abundance of cutin, suberin, lignin-derived compounds or major carbohydrates determined by GC/MS. Conclusions The analyses of light fraction soil organic matte...

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Response of radiata pine forests to residue management and fertilisation across a fertility gradient in New Zealand

Cited by 82 publications

References 5 publications

Distribución de biomasa aérea en un bosque de Pinus patula bajo gestión forestal en Zacualtipán, Hidalgo, México

Distribución de biomasa aérea en un bosque de Pinus patula bajo gestión forestal en Zacualtipán, Hidalgo, México

Product and Residue Biomass Equations for Individual Trees in Rotation Age Pinus radiata Stands under Three Thinning Regimes in New South Wales, Australia

Impacts of plantation forest management on soil organic matter quality

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