Carbon and Nutrient Inputs by Litterfall Into Three Chestnut High Forest Stands in Northern Portugal

Patrício, Maria do Sameiro; Pereira, Ermelinda; Nunes, Luís; Monteiro, M. L.

doi:10.17660/actahortic.2009.815.9

Cited by 3 publications

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“…Sampling followed a west-to-east transect across to northern Portugal from a more-Atlantic-to-lessmaritime influence. General characteristics of these sites can be found in Patrıćio et al (2009Patrıćio et al ( , 2012Patrıćio et al ( , 2014.…”

Section: General Characteristics Of the Sitesmentioning

confidence: 99%

Allometric equations for predicting mineralomass in high-forest chestnut stands in Portugal

Patrício¹,

Tomé²

2018

Acta Hortic.

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The assessment of nutrients in biomass tree-components is a time-consuming and expensive process, often involving tree felling, not always possible or desirable. Thus, mineralomass prediction equations are an important tool for the quantification of the nutrients exported in management and harvesting activities towards its replacement and sustainable management, as well as to evaluate the effect of other disturbances in the balance of ecosystems. Thus, given the importance of the relationship of biomass and nutrients (mineralomass) for dynamic and sustainable management of chestnut woodlands, above-ground mineralomass was studied in sweet chestnut (Castanea sativa Mill.) high-forest stands located in northern Portugal. Nutrient-specific prediction equations that allow estimating the mineralomass (N, P, K, Ca, Mg, S, B and C) stocked in the trees above the ground, considering the tree as a whole (stem + bark + branches + leaves + flowers) and seperately for each tree component: stem-wood, stem-bark, branches, leaves and flowers, based on tree dendrometric variables, DBH (diameter breast height) and total height, were developed.. Linear and non-linear regression estimation methods were used. Data analysis was based on information collected in destructive analysis of 34 felled trees, distributed by the existing diameter classes (10-65 cm) in three adult chestnut stands. Several linear and nonlinear equations were fitted by the least squares method to select models. A simultaneous fit by SUR method using iterative seemingly unrelated regression (ITSUR) was used for the final selected models. The best-fitting models are presented.

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Section: General Characteristics Of the Sitesmentioning

confidence: 99%

Allometric equations for predicting mineralomass in high-forest chestnut stands in Portugal

Patrício¹,

Tomé²

2018

Acta Hortic.

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Aboveground Production and C Flux in Three Chestnut High Forest Stands in Northern Portugal

Patrício¹,

Fernandes²,

Pereira³

et al. 2010

Acta Hortic.

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Litterfall in three high forest chestnut stands in Marão, Padrela and Bornes (Northern Portugal), of 71, 64 and 53 years old, respectively, located on different soil types, was collected in the autumn of 2008. Circular littertraps which cover a surface area of 1 m 2 each were installed in these chestnut stands. The litterfall was separated into leaves, branches, fruits and burs. All litter fractions were dried to constant weight at 70°C. The total amount of litter in the three stands was 4.2, 4.6 and 4.0 Mg DM ha -1 y -1 in Marão, Padrela and Bornes sites, respectively. Leaves are the main constituents of the total biomass return by litterfall contributing to 79.4% in Marão, 69.8% in Padrela and 78% in Bornes. The corresponding amounts of other litter fractions in these three locations were respectively: fruits 6.4%, 12.4% and 8.9%; branches 6.4%, 4.0% and 4.7%; burs 7.8%, 13.8% and 8.3%. C amount falling with litterfall was similar in the three stands, close to 2.3 Mg C ha -1 y -1 . The aboveground net primary production ANPP was evaluated.

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Stem volume ratio equations to variable merchantable limits for sweet chestnut in Portugal

Patrício,

Tomé

2024

Acta Hortic.

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Carbon and Nutrient Inputs by Litterfall Into Three Chestnut High Forest Stands in Northern Portugal

Cited by 3 publications

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Allometric equations for predicting mineralomass in high-forest chestnut stands in Portugal

Allometric equations for predicting mineralomass in high-forest chestnut stands in Portugal

Aboveground Production and C Flux in Three Chestnut High Forest Stands in Northern Portugal

Stem volume ratio equations to variable merchantable limits for sweet chestnut in Portugal

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