Carbon sequestration and nutrient reserves under differen t land use systems

Aguiar, Maria Ivanilda de; Fialho, Jamili Silva; Campanha, M. M.; Oliveira, Teógenes Senna de

doi:10.1590/s0100-67622014000100008

Cited by 14 publications

(19 citation statements)

References 31 publications

(38 reference statements)

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“…), values which are lower than those obtained by Aguiar et al (2014) in a study evaluating an area of dry forest in Brazil preserved for over 50 years, where they found 67.3 t C ha -1 . Dry forests can stock around 20 to 150 t C ha -1 (TIESSEN et al, 1998).…”

Section: Stocks Of Carbon In the Woody Componentcontrasting

confidence: 60%

Carbon stocks in a tropical dry forest in Brazil

Pereira

Andrade

Palácio

et al. 2016

Revista Ciência Agronômica

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-The dry forests are the type most widely distributed vegetation in the tropics, and studies aimed at quantifying the carbon stock in these forests are important for it to be quantified their participation as mitigating the effects of climate change. With that in mind, the aim of this research was to quantify the carbon stocks in the woody, herbaceous, litter and root components of a patch of dry tropical forest, with 30 years of regeneration in Iguatu-CE, Brazil. Initially the vegetation was inventoried by means of a floristic and phytosociological survey of the woody component in a 1 ha area which had been under conservation. The biomass was then estimated employing allometric equations, and the stored carbon was quantified. Stocks of carbon in the litter and the herbaceous plants were determined by monitoring their biomass over 24 months, with subsequent conversion into carbon. Carbon stocks in the roots were estimated as the product of their biomass and carbon concentrations, for this were collected 20 samples at a depth of up to 30 cm deep in the dry and rainy season. It was found that the carbon content varies with the chamber and evaluated by adding carbon stored in woody compartments (19,27 t ha Key words: Semi-arid. Caatinga. Biomass. RESUMO -As florestas secas são amplamente distribuídas nos trópicos, e estudos que visam quantificar o estoque de carbono nessas florestas são importantes para que possa ser quantificada sua participação como mitigadora dos efeitos das mudanças climáticas. Nesse sentido, objetivou-se com essa pesquisa quantificar o estoque de carbono nos componentes: arbustivoarbóreo, herbáceo, serrapilheira e raízes em um fragmento de floresta tropical seca, com 30 anos de regeneração, no município de Iguatú-CE. Inicialmente, realizou-se o inventário da vegetação, através de um levantamento florístico e fitossociológico do componente arbustivo-arbóreo. Posteriormente, estimou-se sua biomassa, empregando-se equações alométricas; em sequencia foi quantificado o carbono estocado. Já o estoque de carbono contido na serrapilheira e nas plantas herbáceas foi determinado através do monitoramento de suas biomassas, durante 24 meses, com posterior conversão dessas para carbono. O estoque de carbono contido nas raízes foi estimado através do produto entre suas biomassas e a concentração de carbono, para isso foram coletadas 20 amostras na camada de até 30 cm de profundidade no período seco e chuvoso, totalizando 40 amostras por ano. O teor de carbono varia de acordo com o compartimento avaliado, e somando-se o carbono estocado nos compartimentos arbustivo-arbóreo (19,27 t ha . Isso evidencia, portanto, a contribuição efetiva da floresta tropical seca na diminuição do CO 2 atmosférico. Palavras-chave: Semiárido. Caatinga. Biomasa.

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Section: Stocks Of Carbon In the Woody Componentcontrasting

confidence: 60%

Carbon stocks in a tropical dry forest in Brazil

Pereira

Andrade

Palácio

et al. 2016

Revista Ciência Agronômica

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“…The annual mean temperature is 28°C, and the mean total annual precipitation is 759 mm. The soils of the studied areas were a typical Arctic Cromic Luvisol and typical Arctic Hipocromic Luvisol, with a clayey texture (AGUIAR et al, 2014).…”

Section: Methodsmentioning

confidence: 99%

Management of natural pasture increases native and exotic herbaceous biomass and biodiversity in the Caatinga of Brazil

Conrado

Cavalcante

Tonucci

et al. 2019

SCA

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The objective of this study was to evaluate the ability of savanna thinning and enrichment with grasses to maintain local biodiversity and intensify biomass production in an area of Caatinga. The study was carried out in a Caatinga area thinned into savanna and an unmanipulated area during the rainy and rainy-dry transition seasons of 2016. The herbaceous biomass production, diversity, and equability of the thinned and unmanipulated areas were evaluated by calculating values of the Shannon-Weaver (H′) and Pielou (J′) indices. The establishment of massai and buffel grasses in the savanna-thinned area was also evaluated. The area thinned into savanna produced more native herbaceous forage biomass in both the rainy (1,940.55 kg ha -1 ) and rainy-dry transition seasons (1,918.55 kg ha -1 ) than that in the unmanipulated area in the same periods (78.42 and 37.40 kg ha -1 , respectively), without compromising biodiversity, as the Shannon-Weaver and Pielou indices for the savanna-thinned area (H′ = 1.48 and J′ = 0.62, respectively) and for the unmanipulated area (H′ = 1.29 and J′ = 0.72) were comparable. The frequency of species with a known forage value in the area thinned into savanna was still able to increase by 141% in the rainy season and 1,700% in the rainy-dry transition season. Massai grass became better-established in the savanna-thinned area that buffel grass, where it produced up to 3 t of dry matter ha -1 . The thinning and enrichment treatments promoted an increase in the biodiversity of the area, and moreover contributed to increases in forage biomass in the Caatinga. ResumoObjetivou-se avaliar o raleamento em savana e o enriquecimento com gramíneas em uma área de Caatinga mantendo a biodiversidade local e intensificando a produção de biomassa. Os estudos foram conduzidos numa Caatinga raleada em savana e numa área não manipulada no período chuvoso que foi dividido em duas épocas em 2016. Avaliaram-se a produção de biomassa herbácea, a diversidade e a equabilidade pelos índices de Shannon -Weaver (H') e de Pielou (J') das áreas raleada em savana e não manipulada. Foi ainda avaliado o estabelecimento dos capins massai e búffel na área raleada Semina: Ciências Agrárias, Londrina, v. 40, n. 2, p. 867-884, mar./abr. 2019 Conrado, J. A. A. et al.em savana. A área raleada em savana produziu mais biomassa de forragem herbácea nativa tanto na época das águas (1.940,55 kg ha -1 ) quanto na época de transição águas-seca (1.918,55 kg ha -1 ) do que a área não manipulada nas mesmas épocas (78,42 e 37,40 kg ha -1 , respectivamente), sem comprometer à biodiversidade, conforme os índices de Shannon-Weaver (H' = 1,48) e Pielou (J' = 0,62) para a área raleada em savana e H' (1,29) e J' (0,72), para a área não manipulada. A área raleada em savana foi ainda capaz de aumentar em 141% na época das águas e 1.700% na época de transição águas-seca, a frequência de espécies de conhecido valor forrageiro. O capim-massai apresentou melhor estabelecimento do que o capim-búffel, na área raleada em savana produzindo até 3 t de MS ha -...

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“…The stability of this biome over time is based on the energy flow and nutrient cycling, as well as on the regulation of the population of animals and plants (AGUIAR et al, 2014). In 2002, the "Center for Vegetable Information of the Northeast" (CNIP), concluded that 40% of the species found in the Caatinga were from the Fabaceae family, with the majority of these species having the capacity to fix N2 (Santos et al, 2010), amongst them Freitas et al (2010) stressed that in environments natural regeneration, fixation can reach 130 kg N ha -1 year -1 .…”

Section: Degradation and Importance Of The Caatinga's Woody Stratum Tmentioning

confidence: 99%

Manipulation of Natural Grassland in Semiarid Region: A Review

Conrado

Cavalcante

Tonucci

et al. 2020

RCR

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Because the Caatinga is one of the most densely populated areas in the world and having agriculture and livestock farming as its main activities, it has been suffering a process of desertification over the years, reflecting on losses in biodiversity and animal productivity, especially as agricultural practices are based on deforestation and burning of native vegetation. Thus, it becomes necessary and fundamental, a searching for management practices that intensify the use of caatinga’s resources without degrading them. This review aims to highlight the use of manipulation techniques of the woody stratum of the Caatinga vegetation, as thinning and enrichment, which aim to increase the support capacity of the native and cultivated pasture, through the increase in herbaceous forage biomass and biodiversity.

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Carbon sequestration and nutrient reserves under differen t land use systems

Cited by 14 publications

References 31 publications

Carbon stocks in a tropical dry forest in Brazil

Carbon stocks in a tropical dry forest in Brazil

Management of natural pasture increases native and exotic herbaceous biomass and biodiversity in the Caatinga of Brazil

Manipulation of Natural Grassland in Semiarid Region: A Review

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