Biomass hyperdynamics as a key modulator of forest self-maintenance in a dystrophic soil in the Amazonia-Cerrado transition

Valadão, Marco Bruno Xavier; Marimon, Ben Hur; Oliveira, Beatriz Fátima Alves de; Lúcio, Nadjarriny Winck; Souza, Maria das Graças Rodrigues; Marimon, Beatriz Schwantes

doi:10.18671/scifor.v44n110.20

Cited by 14 publications

(19 citation statements)

References 19 publications

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“…Most of the studies involving aspects of nutrient cycling in the cerrado have been conducted in areas comprised entirely of Latosols (Peres et al 1983;Schiavini 1983;Nardoto et al 2006;Kozovits et al 2007;Valenti et al 2008;Villalobos-Vega et al 2011;Paiva et al 2015;Valadão et al 2016). There is also a smaller portion of the Cerrado with shallow soils on rocky outcrops (Neosols), which can be mineral-rich (e.g., basalt, diabase and gabbro) or mineral-poor (e.g., arenite, quartz and shale) (Eiten 1972;Reatto et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Nutrient cycling between soil and leaf litter in the Cerrado (Brazilian savanna) on eutrophic and dystrophic Neosols

et al. 2018

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We evaluated nutrient cycling by measuring leaf litter production and decomposition in the Brazilian savanna (cerrado sensu stricto) on eutrophic (calcareous) and dystrophic (arenitic) Neosols over the same spatiotemporal scale. We installed three transects in the Cerrado with plots in each Neosol type. Areas along the transects were randomly chosen for determining soil chemical properties, and accumulated leaf litter was collected monthly for a year for analysis. We used litter bags to test for a correlation between loss of dry mass and nutrient release. Th e calcareous cerrado had higher levels of macronutrients, higher pH, and lower Al compared to the arenitic cerrado. Th e estimated annual release of leaf litter nutrients in kg ha -1 yr -1 was higher in the calcareous cerrado. Nutrient concentration was signifi cantly higher in diff erent months in the calcareous cerrado, except for S and N. In general, the loss of dry mass was not correlated with nutrient release. Calcareous Neosol is unique to the cerrado sensu stricto, and retains more nutrients and facilitates higher leaf litter chemical quality than cerrado of the same physiognomy on dystrophic soils. Nutrient release is not always related to loss of dry mass, regardless of the amount of leaf litter.

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Section: Introductionmentioning

confidence: 99%

Nutrient cycling between soil and leaf litter in the Cerrado (Brazilian savanna) on eutrophic and dystrophic Neosols

et al. 2018

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“…Para ambas as áreas, as folhas obtidas nas amostragens dos coletores de serapilheira (produção acumulada mensal) e das bolsas de decomposição de cada tempo foram moídas, secadas (85 °C / 48 horas) e submetida a análises químicas no LABAS, para quantificarmos os teores de macronutrientes. O nitrogênio foi determinado pelo método de Kjeldahl (Tedesco et al 1985), o P e o K foram determinados a partir de digestão nítrico-perclórica (Bataglia et al 1983) e o P por colorimetria (EMBRAPA 1997). O Ca e Mg foram determinados por espectrofotometria de absorção atômica (Bataglia et al 1983) e o S por turbidimetria (Tedesco et al 1985).…”

Section: Conteúdo De Macronutrientes Na Serapilheira Foliar Produzidaunclassified

“…O nitrogênio foi determinado pelo método de Kjeldahl (Tedesco et al 1985), o P e o K foram determinados a partir de digestão nítrico-perclórica (Bataglia et al 1983) e o P por colorimetria (EMBRAPA 1997). O Ca e Mg foram determinados por espectrofotometria de absorção atômica (Bataglia et al 1983) e o S por turbidimetria (Tedesco et al 1985). Os teores médios de macronutrientes da serapilheira foliar produzida foram multiplicados pela massa seca correspondente e representados em kg.ha-1 nos níveis anual e mensal.…”

Section: Conteúdo De Macronutrientes Na Serapilheira Foliar Produzidaunclassified

“…A maioria dos estudos envolvendo aspectos da ciclagem de nutrientes no cerrado sensu stricto foi desenvolvida em áreas compreendidas inteiramente sobre Latossolos (Peres et al 1983;Schiavini 1983;Kozovits et al 2007;Valadão et al 2016). Existe também uma menor porção do Cerrado que ocorre em solos rasos com afloramentos rochosos (Neossolos) mineralmente ricos (ex.…”

Section: Introdução Geralunclassified

“…É conhecido que as áreas de cerrado sensu stricto afloram predominantemente sobre solos profundos (Latossolos), distróficos e álicos (Eiten 1972;Gottsberger e Silberbauer-Gottsberger 2006). A maioria dos estudos envolvendo aspectos da ciclagem de nutrientes no cerrado sensu stricto foi desenvolvida em áreas compreendidas inteiramente sobre Latossolos (Peres et al 1983;Schiavini 1983;Kozovits et al 2007;Valadão et al 2016). Existe também uma menor porção do Cerrado que ocorre em solos rasos com afloramentos rochosos (Neossolos), sendo o arenito um dos tipos predominantes (Eiten 1972;Reatto et al 1998), onde apenas dois estudos foram publicados (Silva et al 2007;.…”

Section: Introdução Geralunclassified

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Ciclagem de nutrientes em cerrados sobre Neossolos calcário e arenítico

Alves¹

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We investigated whether the nutrient cycling in a cerrado sensu stricto on Calcareous Neosol indicates a more efficient nutrient cycling than the same cerrado physiognomy on sandy soil. We installed three transects for distribution of 60 plots in each cerrado. Among these, 20 were randomly selected, where we evaluated soil chemical properties, quantified litter litter collectors in the year o f study and estimated decomposition through litter bags. We chemically analyzed leaf litter from both collectors and litter bags each month. We tested correlations between loss of dry mass and release of nutrients. The macronutrient contents of the calcareous Neosol were higher than in of sandstone Neosol, being characterized, respectively, as eutrophic and dystrophic. In the first, acidity and Al were lower than in the second. The production of litter and all its components was higher in the cerrado calcareous. The litter and leaf production was significantly higher in several months of the year in the calcareous cerrado, when compared to that of the arenitic cerrado. The decomposition in the calcareous cerrado was significantly faster than that of the arenitic cerrado. The nutrient production was significantly higher in different months in the cerrado, except S and N. In general, loss of dry mass did not correlate with the release o f nutrients. This is the first study of nutrient cycling in areas of cerrado sensu stricto on two types of neosols in the same spatio-temporal scale. The calcareous cerrado, with its high levels of macronutrients in the soil (eutrophic) without extractable soil Al and mainly with limestone rock outcrop, represents a cerrado sensu stricto with its own characteristics and intermediate levels of soil fertility between cerrado sensu stricto on Latosols and deciduous forests on Neosols of Brazil. Such a differentiated nutritional condition also reflects in the leaf litter. Thus, we indicate the importance o f more researches that characterize Cerrado savanna physiognomies on Neosols in the Triângulo Mineiro region, especially in those with calcareous influence, subsidizing their conservation.

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