Efeito da fertilidade de terra preta de índio da Amazônia Central no estado nutricional e na produtividade do mamão hawaí (Carica papaya L.)

Falção, Newton Paulo de Souza; Borges, Lillian França

doi:10.1590/s0044-59672006000400001

Cited by 25 publications

(23 citation statements)

References 1 publication

(1 reference statement)

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“…The chemical analysis (Table 3) of soil samples ADE and ADJ Hatahara site revealed ADE soil pH higher than in ADJ soil. Similar results were obtained by Lima et al (2002) [50] and Falcão and Borges (2006) [51]. In ADE, soil was noted high Ca and P content, high cation exchange capacity (CEC) and low Al saturation in comparison with ADJ soil.…”

Section: Model II Of An Amazonian Agricultural System: Bacterial Commsupporting

confidence: 88%

A Molecular Survey of the Diversity of Microbial Communities in Different Amazonian Agricultural Model Systems

et al. 2010

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Abstract:The processes of land conversion and agricultural intensification are a significant cause of biodiversity loss, with consequent negative effects both on the environment and the sustainability of food production. The anthrosols associated with pre-Colombian settlements in the Amazonian region are examples of how anthropogenic activities may sustain the native populations against harsh tropical environments for human establishment, even without a previous intentionality of anthropic soil formation. In a case study (Model I-"Slash-andBurn") the community structures detected by automated ribosomal intergenic spacer analysis (ARISA) revealed that soil archaeal, bacterial and fungal communities are heterogeneous and each capable of responding differently to environmental characteristics. ARISA data evidenced considerable difference in structure existing between microbial communities in forest and agricultural soils. In a second study (Model II-"Anthropogenic Soil"), the bacterial community structures revealed by terminal restriction fragment length polymorphism (T-RFLP) differed among an Amazonian Dark Earth (ADE), black carbon (BC) and its adjacent non-anthropogenic oxisoil. The bacterial 16S rRNA gene (OTU) richness estimated by pyrosequencing was higher in ADE than BC. The most abundant bacterial phyla in ADE soils and BC were Proteobacteria-24% ADE, 15% BC; Acidobacteria-10% ADE, 21% BC; Actinobacteria-7% ADE, 12% BC; Verrucomicrobia, 8% ADE; 9% BC; Firmicutes-3% ADE, 8% BC. Overall, unclassified bacteria corresponded to 36% ADE, and 26% BC. Regardless of current land uses, our data suggest OPEN ACCESSDiversity 2010, 2 788 that soil microbial community structures may be strongly influenced by the historical soil management and that anthrosols in Amazonia, of anthropogenic origins, in addition to their capacity of enhancing crop yields, may also improve microbial diversity, with the support of the black carbon, which may sustain a particular and unique habitat for the microbes.

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Section: Model II Of An Amazonian Agricultural System: Bacterial Commsupporting

confidence: 88%

A Molecular Survey of the Diversity of Microbial Communities in Different Amazonian Agricultural Model Systems

et al. 2010

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“…The values of leaf N contents, from 40.0 to 53.1 g kg -1 , are consistent with 42.6, 44.9 and 45.0 g kg -1 reported by Falcão & Borges (2006), Almeida et al (2002) and Campostrini et al (2001). Malavolta et al (1997) described the range of 40 to 50 g kg -1 as ideal for papaya at flowering.…”

Section: Resultssupporting

confidence: 90%

“…These values are within the range adopted as sufficient for papaya (Malavolta et al, 1997) and are similar to 22.82 g kg -1 , obtained by Falcão & Borges (2006).…”

Section: Resultssupporting

confidence: 88%

Nutritional status and fruit production of Carica papaya as a function of coated and conventional urea

Júnior

Santos

Silva

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TAs a strategy to minimize N losses in the soil, mineral N sources, such as polymer-coated urea, have been studied as possibility to increase the synchronization of N release by the fertilizer and its absorption by plants. Thus, this study aimed to evaluate the contents of macronutrients and the production of Formosa papaya as a function of sources and doses of N fertilizer applied as top-dressing in the region of Bom Jesus-PI, Brazil. The treatments were arranged in a 2 x 4 factorial scheme corresponding to N sources (coated urea and conventional urea) and N doses (350, 440, 530 and 620 g plant -1 of N), with four replicates and four plants per plot. The contents of macronutrients in the leaf dry matter and fruit production were evaluated. The sources and doses of top-dressing N fertilization incremented the leaf contents of macronutrients and the production of Formosa papaya hybrid Caliman 01. Under the experimental conditions and based on the macronutrient contents considered as adequate for crop nutrition, associated with maximum fruit production (8.08 kg plant -1 ), the supply of 525 g of N plant -1 is recommended in the form of coated urea.Estado nutricional e produção do mamoeiro Formosa em função da aplicação de ureia protegida e convencional R E S U M O Como estratégia para minimizar as perdas de N no solo tem-se estudado fontes minerais de N-fertilizantes protegidas com polímeros a partir das quais é possível aumentar o sincronismo entre a liberação do nutriente pelo fertilizante e sua absorção pela planta. Neste sentido teve-se, como objetivo, avaliar os teores dos macronutrientes e a produção do mamoeiro Formosa em função de fontes e doses de N-fertilizante aplicadas em cobertura na região de Bom Jesus, PI. Os tratamentos foram dispostos em esquema fatorial 2 x 4 correspondentes a fontes de nitrogênio (ureia protegida e ureia convencional) e doses de nitrogênio (350, 440, 530 e 620 g planta -1 de N) com quatro repetições e quatro plantas por parcela. Avaliaram-se os teores de macronutrientes na massa seca foliar e a produção de frutos. As fontes e doses de adubação nitrogenada em cobertura incrementam as concentrações foliares de macronutrientes e a produção do mamoeiro Formosa híbrido Caliman 01. Nas condições em que o experimento foi desenvolvido e considerando os teores de macronutrientes admitidos como adequados para a nutrição da cultura associada à produção máxima de frutos (8,08 kg planta -1 ) recomenda-se o fornecimento de 525 g planta -1 de N na forma de ureia protegida.

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“…In addition, the chemical and physical characteristics of these soils have been also reported in several publications (Falcão and Borges 2006;Moreira et al 2009;Santos et al 2013 b). However, such descriptions have mainly been associated with Oxisols and occasionally with other soil classes such as Inceptsol, Ultisol, and Entisols, these classified according to Soil Taxonomy classification system.…”

Section: Introductionsupporting

confidence: 60%

Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon

et al. 2016

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Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain.KEYWORDS: Anthropic horizon, Soil organic carbon, Soil quality, Floodplain soils Propriedades físicas e químicas de Terra Preta Antropogênica em Bragança, Pará, Amazônia Oriental RESUMOEmbora as terras pretas antropogênicas (TPA) geralmente são encontradas em áreas de terra firme, elas também ocorrem em áreas e várzeas, mas, não há informações sobre as características químicas e físicas de TPA neste ambiente. Neste estudo, nós propomos verificar a hipótese de que um Gleissolo, classificado como TPA, apresenta melhores condições químicas e físicas do que o solo adjacente, não antropogênico. Assim, o objetivo do estudo foi caracterizar as propriedades químicas e físicas da camada superficial de dois perfis de TPA em um Gleissolo e compará-los com um solo adjacente. Amostras de solo foram coletadas em duas áreas classificadas como TPA em Bragança, Estado do Pará, Brasil, no sítio arqueológico "Jabuti" e em uma área adjacente não antropogênica. Amostras de solo com estrutura deformada e indeformada foram coletadas na profundidade de 0,05-0,10 m para análises químicas (pH, acidez potencial, cátions trocáveis, e carbono orgânico do solo) e físicas (distribuição do tamanho das partículas do solo, densidade de partículas, curva de retenção de água, porosidade total, microporosidade, macroporosidade e densidade do solo). As duas áreas de TPA em Gleissolo, apresentaram melhores ...

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Efeito da fertilidade de terra preta de índio da Amazônia Central no estado nutricional e na produtividade do mamão hawaí (Carica papaya L.)

Cited by 25 publications

References 1 publication

A Molecular Survey of the Diversity of Microbial Communities in Different Amazonian Agricultural Model Systems

A Molecular Survey of the Diversity of Microbial Communities in Different Amazonian Agricultural Model Systems

Nutritional status and fruit production of Carica papaya as a function of coated and conventional urea

Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon

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