Perfil nutricional de espécies lenhosas de duas florestas semidecíduas em Uberlândia, MG

Haridasan, M.; Araújo, Glein Monteiro

doi:10.1590/s0100-84042005000200010

Cited by 26 publications

(21 citation statements)

References 23 publications

(19 reference statements)

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“…Notwithstanding, Al-accumulating plants are widely distributed among the distinct vegetation types. Haridasan (1982) observed 35% of Alaccumulating species in a cerrado sensu stricto; Haridasan and Araújo (1988) found 18% of these plants in a cerradão growing on a dystrophic soil, but less than 8% when this forest physiognomy was growing on a mesotrophic soil, and only 7% of Al-accumulating species were observed in a semideciduous forest Haridasan 1997, Haridasan andAraújo 2005).…”

mentioning

confidence: 99%

“…These plants grow on the acidic and Al-rich soils from the cerrado and are known as Al-accumulating and non-accumulating species. They co-occur in the typical savanna-type vegetation, the cerrado sensu stricto (Haridasan 1982) and cerradão (dense cerrado) (Haridasan and Araújo 1988), and also in semi-deciduous forests Haridasan 1997, Haridasan andAraújo 2005) and gallery forests (Nascimento and Hay 1990).…”

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confidence: 99%

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Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Souza

Bueno

Morellato

et al. 2015

An. Acad. Bras. Ciênc.

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The cerrado's flora comprises aluminum-(Al) accumulating and non-accumulating plants, which coexist on acidic and Al-rich soils with low fertility. Despite their existence, the ecological importance or biological strategies of these functional groups have been little explored. We evaluated the leaf flushing patterns of both groups throughout a year; leaf concentrations of N, P, K, Ca, Mg, S, Al, total flavonoids and polyphenols; as well as the specific leaf area (SLA) on young and mature leaves within and between the groups. In Al-accumulating plants, leaf flushed throughout the year, mainly in May and September; for non-accumulating plants, leaf flushing peaked at the dry-wet seasons transition. However, these behaviors could not be associated with strategies for building up concentrations of defense compounds in leaves of any functional groups. Al-accumulating plants showed low leaf nutrient concentrations, while non-accumulating plants accumulated more macronutrients and produced leaves with high SLA since the juvenile leaf phase. This demonstrates that the increase in SLA is slower in Al-accumulating plants that are likely to achieve SLA values comparable to the rest of the plant community only in the wet season, when sunlight capture is important for the growth of new branches.

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confidence: 99%

mentioning

confidence: 99%

Ecological strategies of Al-accumulating and non-accumulating functional groups from the cerrado sensu stricto

Souza

Bueno

Morellato

et al. 2015

An. Acad. Bras. Ciênc.

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“…Referente aos os resultados apresentados na Tabela 4, podese afirmar que elementos minerais como N, P e K, considerados móveis nas plantas (Hawkesford et al, 2012) apresentam, como regra, maiores concentrações nas folhas fisiologicamente mais ativas enquanto para Ca, nutriente considerado de baixa mobilidade na planta, as folhas velhas são as que apresentam os maiores teores deste nutriente (Epstein & Bloom, 2006). O resultado obtido com o Mg pode ser atribuído ao tipo de metodologia usada para coleta do material vegetal.…”

Section: Resultsunclassified

“…Quanto ao Ca, os teores encontrados nas folhas (Tabela 4) remetem a uma planta de característica calcícola, visto que aproximadamente 50% se enquadram na classificação proposta por How & Merkle (1950) (Haridasan & Araújo, 2005). Conforme se observa na Tabela 2, os teores de Ca nos solos amostrados predominam na faixa considerada de baixa a média (SBCS, 2004).…”

Section: Resultsunclassified

Caracterização nutricional do nim em plantios no Brasil

Neves¹,

Reissmann

Dedecek³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONo Brasil são incipientes os estudos sobre os aspectos nutricionais do cultivo do nim. Propôs-se, neste trabalho, determinar os teores foliares de macronutrientes em plantios de nim estabelecidos em oito Estados do Brasil e correlacioná-los com os nutrientes disponíveis na camada de 0-20 cm de profundidade dos solos sob os plantios amostrados. De cada plantio foram coletadas folhas de nove árvores das partes média/superior e média/inferior da copa, as quais foram misturadas, formando duas amostras compostas denominadas folhas da copa média/superior (FCMS) e folhas da copa média/inferior (FCMI). Para análise de variância dos teores foliares de nutrientes utilizou-se o delineamento inteiramente casualizado, com decomposição total dos graus de liberdade visando ao efeito local de plantio, idade de plantio e posição na copa, sendo a comparação de médias realizada pelo Teste de Duncan (p ≤ 0,05). A amostragem foliar nas árvores de nim depende, quando feita na posição mediana subdividida em FCMS e FCMI, entre outros fatores, da mobilidade do nutriente e da condição de luminosidade do plantio. Os teores foliares de Ca apresentam indícios de ser o nim uma espécie calcícola. O nim é eficiente na absorção de N, P e Ca. O K do solo apresenta correlação positiva com o K das FCMI. Palavras-chave:Azadirachta indica A. Juss., macronutrientes da planta, relação solo-planta Nutritional characterization of neem plantations in Brazil ABSTRACT In Brazil, there are very few studies about nutritional status of neem. This study aimed to determine the contents of macronutrients in leaf in neem plantations established in different locations in eight states of Brazil, and perform correlations with the available nutrients in the respective soils under the sampled plantation. From each plantation the leaves were collected from nine trees, from the middle superior and middle inferior part of the crown. Each part of the crown of the nine trees were mixed, forming two composite samples and were nominated as leaves from the middle superior crown (FCMS), and middle inferior crown (FCMI). At the time of leaf sampling, the soil was collected in 0-20 cm depth. For variance analysis of the nutrient contents of leaf, a completely randomized design was used, applying total decomposition of the degrees of freedom for stand localization, stand age and crown position effect, being the mean comparisons performed by the Duncan test (p ≤ 0,05). Additional correlation and cluster analysis were applied integrating soil data. The leaf sampling of neem trees, when realized in the middle of the crown subdivided in FCMS and FCMI depends, among other factors, on the nutrient mobility and on the light conditions of the stand. The leaf contents of Ca show indications that the neem plant could be a calcicole plant, and efficient in N and P absorption. The soil K content is positively correlated with the K content of the FCMI position.

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“…There are soils with a base saturation of 50 to 65% -Marília Formation, Bauru Group -in some scarce areas (Embrapa, 1982). In tropical semideciduous forest conditions at "Fazenda do Glória (18° 57' S to 48° 12' W) the dystrophic red latosol has a base saturation varying from 7.4 to 29% and low availability of N, P and Ca (Haridasan & Araújo, 2005).…”

Section: Study Areamentioning

confidence: 99%