Biomass, nutrient content, litterfall and nutrient return to the soil in Mediterranean oak forests

Rapp, M.; Santa‐Regina, Ignacio; Rico, M.; Gallego, H. A.

doi:10.1016/s0378-1127(98)00508-8

Cited by 113 publications

(104 citation statements)

References 11 publications

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“…For Ca and Mg, the pattern of decreasing concentration was as follows: stem bark > twigs > leaves = thin branches > stem wood = roots > thick branches. Similar trends of nutrient accumulations in tree fractions have been reported for Quercus robur [9] and for other species in temperate regions [19,33,41].…”

Section: Tree Biomasssupporting

confidence: 83%

“…Very similar distributions in stem and crown have been observed for other species of Quercus (Quercus pyrenaica, Quercus ilex and Quercus faginea) in the region [11,22,41]. However, the present data differed from that corresponding to other oak species in Central Europe (Quercus petraea, [3]) and the USA (Quercus alba, Quercus coccinea, Quercus prinus, Quercus rubra; [31]), where stem biomass has been found to range from 73 to 84%.…”

Section: Biomass Prediction Equations and Stand Biomass Amountssupporting

confidence: 76%

“…Less intensive management, along with the implementation of conservation measures can contribute to restoring forest structure and therefore, C stocks and nutrient cycling. Above-and below-ground biomass and nutrient pools in oak forests have been partially documented in Europe [3,22,39,41,52]. However, there is a need for further, more complete, studies on ecosystem C and nutrient amounts to assess the effects of management practices and to reach the implementation of conservation measures.…”

Section: Introductionmentioning

confidence: 99%

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Carbon and nutrient stocks in matureQuercus roburL. stands in NW Spain

et al. 2006

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-In the present study, the distribution of C and nutrients in biomass (above-and below-ground) and soil were estimated in native Quercus robur stands in NW Spain. This information can be used to design future strategies to preserve and improve these forests, which are subjected to severe degradation as a consequence of poor management and fire damage. Biomass equations for tree components were fitted simultaneously using the data corresponding to 31 trees felled in 4 representative mature stands. The C accumulated in aerial biomass, roots, litter layer and mineral soil made up 40, 10, 8 and 42% respectively, of the C in the whole forest system. Tree biomass contained higher amounts of macronutrients than the available reserves in the soil. Stem wood was the major tree compartment for most nutrients, with the exception of Ca, which was mainly accumulated in stem bark. In comparison with commercial forest plantations in the region, particularly high amounts of nutrients were accumulated in the litter layer because of the high amounts of litterfall and higher foliar concentrations of nutrients. Quercus robur L. / biomasse / nutrition forestière / carbone / régression apparemment sans rapport

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Section: Tree Biomasssupporting

confidence: 83%

Section: Biomass Prediction Equations and Stand Biomass Amountssupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Carbon and nutrient stocks in matureQuercus roburL. stands in NW Spain

et al. 2006

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“…It is somewhat surprising that in some studies it is reported that no-needles litterfall was negligible (Kavvadias et al, 2001;Roig et al, 2005). Oak leaves contributed to about 50% to total oak-derived litterfall, a much lower value than other studies on Q. pyrenaica (Gallardo et al, 1998), Q. ilex (Rapp et al, 1999) or Quercus robur L. (Díaz-Maroto and Vila-Lameiro, 2006;Hansen et al, 2009;Vesterdal et al, 2008). The only studies with similar relative contribution of leaves to total litterfall were those in which a high proportion of acorns was found (Callaway and Nadkarni, 1991;Díaz-Maroto and Vila-Lameiro, 2006), but that was not our case during the sampling period.…”

Section: Litterfall In the Ecotone Scots Pine -Pyrenean Oak 491mentioning

confidence: 78%

Aboveground soil C inputs in the ecotone between Scots pine

Díaz-Pinés¹,

Sánchez²,

Montes

2011

For. syst.

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Aboveground litterfall from Pyrenean oak (Quercus pyrenaica Willd. a semi-deciduous species), mixed Pyrenean oak-pine and pine (Pinus sylvestris L.) forest stands was surveyed in two sites in a Mediterranean mountain area during a period of 36 and 29 months, respectively. Separation in different litterfall fractions was performed, and C content of each fraction was measured to calculate the C flux to the soil due to litterfall. Our results showed that litterfall input was higher in pine stands than in Pyrenean oak stands (1.8-2.4 Mg C ha -1 year -1 at pine plots and 0.9-1.4 Mg C ha -1 year -1 at oak plots) and mixed plots showed intermediate values. Needles or leaves contributed about 50% to total litterfall, underpinning the importance of the rest of materials in the soil C input. The seasonal pattern showed a maximum in Pyrenean oak stands in autumn-early winter, while the pine stands had the maximum in summer, which is in consonance with the physiology of fall of broadleaves and coniferous trees in these latitudes , but clearly differs from needle-shed in Central and Northern Europe. A dry-spring year corresponded to a lower leaf fall during the following autumn, and leaf abscission came some weeks earlier than a year with a rainy spring.Key words: litterfall; Pinus sylvestris; Quercus pyrenaica; ecotone; Mediterranean mountain. ResumenCaída de hojarasca en un ecotono Pinus sylvestris L.-Quercus pyrenaica Willd. en la Sierra de Guadarrama La tasa de caída de hojarasca en parcelas puras de rebollo (Quercus pyrenaica Willd.), parcelas mixtas de rebollo y pino silvestre y parcelas puras de pino (Pinus sylvestris L.) fue estudiada en dos localizaciones de montaña mediterránea durante 36 y 29 meses, respectivamente. Se llevó a cabo una separación de los componentes de la hojarasca, y se determinó el porcentaje de C en cada una de las fracciones, para calcular un flujo de entrada de C al suelo debido al desfronde. Nuestros resultados muestras que la tasa de caída de hojarasca fue más alta en parcelas de pino que de rebollo, alrededor del doble (1.8-2.4 Mg C ha -1 año -1 en pino frente a 0.9-1.4 Mg C ha -1 año -1 en rebollo); las parcelas mixtas mostraron valores intermedios. Las acículas u hojas contribuyeron alrededor del 50% al total de caída de hojarasca. El patrón estacional mostró un máximo de caída de hojarasca de rebollo en otoño y comienzos de invierno, mientras que en las parcelas de pino, dicho máximo se produjo en verano, lo que es congruente con la fisiología de la caída de hojas o acículas en frondosas y coníferas en estas latitudes, pero desmarcándose de los valores obtenidos en Europa Central y del Norte. Un año con primavera seca coincidió con un desfronde de hojas de rebollo menor; asimismo, la caída de la hoja se adelantó algunas semanas con respecto al año con una primavera lluviosa.

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“…3, and contained higher nutrient concentrations than that of the stems [29]. Q. pyrenaica forests usually grow in acid soils.…”

Section: Forest Inventories and Weight Equationsmentioning

confidence: 94%

Productivity and cost of biomass harvesting for energy production in coppice natural stands of Quercus pyrenaica Willd. in central Spain

Laina

Tolosana

Ambrosio

2013

Biomass and Bioenergy

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a b s t r a c tBiomass growing stocks, harvesting productivity and costs of energy production, were studied in thinnings of Quercus pyrenaica.Eleven forest sites were selected in coppices located in Castilla y Leo´ n (Spain). Three systems were employed for harvesting: a mech-anised whole tree harvesting (WTH) system, which included chipping at landing; a fully mechanised cut-to-length (CTL) harvesting system for firewood; and a semi-mechanised CTL system with manual felling and bunching. Three WTH trials had a hauling off 34.7 e44.1 oven-dried tonnes (odt) ha À1 . In contrast, only 11.6e30.0 odt ha À1 were obtained in the other eight CTL trials.Biomass weight equations for stems and whole trees were fitted. Worker operations were time-studied using software designed by the authors. The WTH system reached maximum productivity rates of 3.9 oven-dried tonnes per productive hour (odt h À1 ) for the felling and bunching operation and 6.9 odt h À1 for the forwarding opera-tion. The mechanised CTL harvesting method achieved a productivity range of 1.3 e0.5 odt h À1 for the harvesting operation. Furthermore, the average forwarding produc-tivity was 7.3 odt h À1 . Motor-manual felling and crosscutting in the CTL system accom-plished a productivity range of 0.7e1.9 odt h À1 . Manual bunching resulted in similar values. The lowest firewood unit cost for trees with 10 cm of diameter at breast height (DBH) was 62.0 V odt À1 using a semi-mechanised CTL system. Under similar conditions, this cost was 85.2 V odt À1 for the mechanised CTL system. Finally, the cost corresponding to chips at landing from WTH sites (average DBH ¼ 10 cm) was 65.3 V odt À1 . IntroductionThe Spanish Renewable Energy Plan (2005e2010) [1] has finished. This plan tried to increase renewable energy (RE) production rate of total primary energy production (4.77 Â 10 12 MJ) from 6.3% in 2005 to 30% in 2010. Bioenergy was an important part of the plan's goal. Currently, there are only 648 MW generating capacity installed [2] in biomass power plants; however, the plan had aimed to reach 1317 MW by 2010. The objective remained unaccomplished despite government subsidies for electricity production from forest residuals (0.11 V kWh À1 ) and from forest woody crops (0.16 V kWh À1 ) [3]. According to the RE National Action Plan 2011e2020 [4], renewable energies accounted for 9.4% of primary energy consumption in 2010, 132,000 Mtep, whereas the goal for 2020 is 20.1%. Regarding electricity production, RE

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Biomass, nutrient content, litterfall and nutrient return to the soil in Mediterranean oak forests

Cited by 113 publications

References 11 publications

Carbon and nutrient stocks in matureQuercus roburL. stands in NW Spain

Carbon and nutrient stocks in matureQuercus roburL. stands in NW Spain

Aboveground soil C inputs in the ecotone between Scots pine

Productivity and cost of biomass harvesting for energy production in coppice natural stands of Quercus pyrenaica Willd. in central Spain

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