Decomposition and nutrient release from leaf litter of Eucalyptus globulus grown under different water and nutrient regimes

Ribeiro, Carlos Antônio Álvares Soares; Madeira, Manuel; Araújo, M. C.

doi:10.1016/s0378-1127(02)00459-0

Cited by 90 publications

(79 citation statements)

References 24 publications

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“…The fast loss of P observed during the early decomposition stages is in agreement with results reported for leaf litter of a chestnut stand exploited for wood (Martins et al, 2007) and several leaf litters and needles of other forest species (Buchanan and King, 1993;Pereira, 2004;Ribeiro et al, 2002;Sá et al, 2005). The fast initial P release from leaf litter, by both direct leaching and microbial biomass, increased with the litter P content (Ribeiro et al, 2002) or with inorganic P (soluble) present in plant residues (Buchanan and King, 1993). The high initial P content in studied litters may thus explain the high initial P release.…”

Section: Nutrient Dynamics During Decompositionsupporting

confidence: 88%

“…In addition, the decomposition rate of the LeSur (-0.48) was much lower than that observed by Pereira The increase in the decay rate observed for the LeSur, over the incubation period, followed the pattern reported by Gallardo-Lancho et al (1995) for a chestnut forest in the Sierra da Gata (mean air temperature of 15 • C and mean rainfall of 1150 mm), in which decay rates were -0.21 and -0.46 for one and two years of incubation, respectively. This decomposition pattern (also observed for the BuSur) may be specific to chestnut leaf litter, as decomposing leaves of other species, in Portugal, placed on the soil surface (Azevedo, 2004;Pereira, 2004;Ribeiro et al, 2002) showed a faster mass loss during the initial phase of the decomposition process.…”

Section: Litter-mass Loss and Decay Ratessupporting

confidence: 56%

“…II), differences being larger for Ca, Mg and N. Therefore, the C:N ratio was much higher for burs (83.3) than for leaves (53.8), while values of the C:P ratios were 379 and 338, respectively. A very small content of S was observed in both leaves and burs, corresponding in the former to a C:S ratio (1540) much higher than that reported for other Mediterranean tree species (Ribeiro et al, 2002;Wesemael, 1993). Leaves had greater content of lignin than burs, and therefore the lignin/N ratio was greater in leaves (36) than in burs (23).…”

Section: Initial Substrate Characteristicsmentioning

confidence: 68%

“…4a), and this ratio was close to 12:1 (LeBur and LeSur), 16:1 (BuBur) and 30:1 (BuSur) at the end of the incubation period. The C:N ratio has been reported as a good indicator of N mineralization for a wide range of litter types (Ribeiro et al, 2002;Wesemael, 1993). According to Wesemael (1993), the C:N ratio from which N mineralization starts should be in the range 20-30.…”

Section: Nutrient Dynamics During Decompositionmentioning

confidence: 99%

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Decomposition of chestnut litterfall and eight-year soil chemical changes under a no-tillage management system in Northern Portugal

Raimundo

Martins

Madeira³

2008

Ann. For. Sci.

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-• Chestnut stands (Castanea sativa Mill.) for fruit production, in Northern Portugal, are subjected to frequent soil tillage operations, which is considered a threat for the system sustainability.• The effects of replacement of conventional tillage by the no-tillage system in chestnut stands on decomposition and nutrient dynamics of leaf litter and burs were evaluated, using the litterbag methodology. Amounts of mass and nutrients in the organic layers, and chemical characteristics of the 0-20 cm top soil layer were assessed after eight years.• The mass loss and release of N, P, Ca and Mg from both leaves and burs buried in the soil were faster than from those placed on the soil surface. Burs decomposed and released nutrients more slowly than leaf litter. The no-tillage system led to the formation of organic layers, which retained great amounts of N (249.2 kg ha −1 ) and Ca (215.5 kg ha −1 ). Such a management system increased the concentration of organic C and nutrients in the 0-5 cm top soil layer, but significant differences were only observed for exchangeable Ca.• The no-tillage system may enhance organic C accumulation regarding the conventional system, due to the increment in both organic and mineral soil layers.litterfall decomposition / litterbag / nutrient dynamics / chestnut stand / soil management / decomposition models / no-tillage / conventional tillage Résumé -Décomposition des chutes de litière de châtaignier et huit années de changements chimiques du sol sous un système de gestion sans labour dans le Nord du Portugal.• Les peuplements de châtaignier (Castanea sativa Mill.) pour la production de fruits dans le Nord du Portugal font l'objet de fréquentes opérations de labour, qui sont considérées comme une menace pour un système de gestion durable.• Les effets de remplacement du labour traditionnel par un système sans labour dans les peuplements de châtaignier sur la décomposition et la dynamique des nutriments des feuilles de la litière et des bogues, ont été évalués en utilisant la technique des sacs à litière. La masse totale des nutriments dans les strates organiques et les caractéristiques chimiques de la partie supérieure (0-20 cm) du sol ont été estimées au bout de huit ans.• La perte de masse et la libération de N, P, Ca et Mg provenant des feuilles et des bogues enfouies dans le sol ont été plus rapides que dans le cas de feuilles et bogues placées à la surface du sol. Les bogues se décomposent et libèrent des nutriments plus lentement que les feuilles de la litière. Le système d'absence de labour a conduit à la formation de strates organiques, qui retiennent une grande quantité de N (249,2Kg ha −1 ) et de Ca (215,5 kg ha −1 ). Un tel système de gestion a accru la concentration en C organique et en nutriments dans la strate de la partie supérieure du sol (0-5cm), mais des différences significatives ont été observées seulement pour le Ca échangeable.• Le système sans labour peut accroître l'accumulation de C organique par rapport au système traditionnel à cause de l'accroissement ...

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Section: Nutrient Dynamics During Decompositionsupporting

confidence: 88%

Section: Litter-mass Loss and Decay Ratessupporting

confidence: 56%

Section: Initial Substrate Characteristicsmentioning

confidence: 68%

Section: Nutrient Dynamics During Decompositionmentioning

confidence: 99%

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Decomposition of chestnut litterfall and eight-year soil chemical changes under a no-tillage management system in Northern Portugal

Raimundo

Martins

Madeira³

2008

Ann. For. Sci.

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“…indicates that substrate quality was not a limiting factor to microbial activity, which is corroborated by the nonsignificant effect of fertilization. Fertilization of eucalypt stands has been shown to increase mineralization of added nutrients, but not litter decomposition rates (RIBEIRO et al, 2002;O'CONNELL;MENDHAM, 2004). Soil respiration on footslopes was higher than on hillslopes, despite the similar substrate chemistry (Table 1).…”

Section: Litterbag Experimentsmentioning

confidence: 98%

Forest Litter Decomposition as Affected by Eucalyptus Stand Age and Topography in South-Eastern Brazil1

2015

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-Forest litter decomposition is a major process in returning nutrients to soils and thus promoting wood productivity in the humid tropic. This study aimed to assess decomposition of eucalypt litter in the Rio Doce region, Brazil. Leaf litter was sampled under clonal eucalypt stands aged 2, 4 and 6 years on hillslopes and footslopes. Soil and soil+litter samples were incubated at two levels of soil moisture, temperature and fertilization. C-CO 2 emissions from soil measured during 106 days were higher at 32 °C than at 23°C, mainly for the 2-yr-old stand on footslope. When leaf litter was added on soils, C-CO 2 emissions were eight times higher, mainly on footslopes, with no effect of stand age. Leaf decomposition in situ, assessed with a litterbag experiment showed a mean weight loss of at least 50% during 365 days, reaching 74% for 2 yr-old stands on footslopes. In comparison with data from the native forest and the literature, no apparent restrictions were found in eucalypt litter decomposition. Differences between in vitro and in situ results, and between eucalypt and native forest, were most likely related to the response of diverse decomposer communities and to substrate quality.Keywords: Soil respiration; Litterbag; CO 2 evolution. DECOMPOSIÇÃO DE SERAPILHEIRA FLORESTAL: EFEITO DA IDADE DO EUCALIPTO E TOPOGRAFIA NO SUDESTE DO BRASILRESUMO -A decomposição de serapilheira florestal é um processo importante ao retornar nutrientes ao solo e, assim, estimular a produtividade da madeira no trópico úmido. Este trabalho objetivou avaliar a decomposição de serapilheira de eucalipto na região do rio Doce, MG. Frações foliares foram amostradas em plantações de eucalipto nas idades de 2, 4 e 6 anos e posições de encosta e baixada. Amostras de solo e solo + fragmentos de folhas foram incubadas em dois níveis de umidade, temperatura e fertilização. A quantidade de C-CO 2 emitida pelo solo no período de 106 dias foi maior na temperatura de incubação de 32 o C do que a 23 o C, especialmente em solos de baixada, na idade de 2 anos. A respiração do solo foi intensificada oito vezes pela presença de fragmentos de folhas sobre o solo, principalmente em solos da baixada, e não houve efeito significativo para a idade. A decomposição foliar in situ, avaliada em um experimento de sacos de decomposição, apresentou perda média de no mínimo 50% durante 365 dias, alcançando 74% para o eucalipto em dois anos, na baixada. Após a comparação com uma mata nativa e dados da literatura nacional, não foi encontrada nenhuma restrição aparente na decomposição da fração foliar do eucalipto. Diferenças entre os resultados in vitro e in situ e entre a mata nativa e o eucalipto podem estar relacionadas a uma diferente comunidade de decompositores e à qualidade do substrato foliar.Palavras-chave: Respiração do solo; Sacos de decomposição; Emissão de CO 2 .

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Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems

et al. 2016

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Forest ecosystems play an important role in the global cycling of mercury (Hg). In this study, we characterized the Hg cycling at a remote evergreen broadleaf (EB) forest site in southwest China (Mount Ailao). The annual Hg input via litterfall is estimated to be 75.0 ± 24.2 µg m−2 yr−1 at Mount Ailao. Such a quantity is up to 1 order of magnitude greater than those observed at remote temperate/boreal (T/B) forest sites. Production of litter biomass is found to be the most influential factor causing the high Hg input to the EB forest. Given their large areal coverage, Hg deposition through litterfall in EB forests is appropriately 9 ± 5 Mg yr−1 in China and 1086 ± 775 Mg yr−1 globally. The observed wet Hg deposition at Mount Ailao is 4.9 ± 4.5 µg m−2 yr−1, falling in the lower range of those observed at 49 T/B forest sites in North America and Europe. Given the data, the Hg deposition flux through litterfall is approximately 15 times higher than the wet Hg deposition at Mount Ailao. Steady Hg accumulation in decomposing litter biomass and Hg uptake from the environment were observed during 25 months of litter decomposition. The size of the Hg pool in the organic horizon of EB forest floors is estimated to be up to 2–10 times the typical pool size in T/B forests. This study highlights the importance of EB forest ecosystems in global Hg cycling, which requires further assessment when more data become available in tropical forests.

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Decomposition and nutrient release from leaf litter of Eucalyptus globulus grown under different water and nutrient regimes

Cited by 90 publications

References 24 publications

Decomposition of chestnut litterfall and eight-year soil chemical changes under a no-tillage management system in Northern Portugal

Decomposition of chestnut litterfall and eight-year soil chemical changes under a no-tillage management system in Northern Portugal

Forest Litter Decomposition as Affected by Eucalyptus Stand Age and Topography in South-Eastern Brazil1

Enhanced accumulation and storage of mercury on subtropical evergreen forest floor: Implications on mercury budget in global forest ecosystems

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