RÚCULA cv. Apreciatta Folha Larga SUBMETIDA A DOSES DE FÓSFORO

Matos, Lavine Silva; Santos, Nalbert Silva dos; Anjos, Gilvanda Leão dos; Souza, Diego dos Santos; Santos, Anacleto Ranulfo dos

doi:10.18677/enciclopedia_biosfera_2016_160

Cited by 5 publications

(6 citation statements)

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“…O emprego do girassol (Helianthus annuus L.) como flor ornamental de corte vem alcançando êxitos no mercado da floricultura devido suas características como época de semeadura que pode ser ampla, adequando-se às exigências do setor e sua boa adaptação aos diferentes climas podendo tolerar temperaturas baixas e períodos de estresse hídrico (SOUZA, 2019). Assim, encontra-se inserido no ramo da floricultura, como uma cultura de grande potencial econômico, podendo ser utilizada na rotação de culturas, como recicladora de nutrientes no perfil do solo, na alimentação animal, na produção de óleo, biodiesel e como flor de corte (SANTOS et al, 2010). Contudo, as elevadas produtividades do girassol, estão diretamente relacionadas à qualidade nutricional do cultivo.…”

Section: Resultsunclassified

Ciências agrárias: a multidisciplinaridade dos recursos naturais

2024

Ciências Agrárias: A Multidisciplinaridade Dos Recursos Naturais

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Resumo: Segundo informações do MMA -Ministério do Meio Ambiente (2005), uma grande quantidade da população vive em zonas costeiras havendo a possibilidade do aumento da concentração demográfica nessas regiões. Trata -se de uma região sensível onde a qualidade ambiental, valor paisagístico e diversidade biológica estão sujeitas a pressões urbanas e industriais podendo resultar no desequilíbrio dos habitats naturais. Este estudo apresenta o modelo PER -Pressão, Estado e Resposta, aplicado aos ativos ambientais existentes na zona costeira da Região de Barra de São Miguel (RBSM), localizado no estado de Alagoas, demonstrando a atualização, análise e identificação desses ativos ambientais e de que forma ocorre a pressão socioambiental presente na área. Para tal, buscou-se comparar dados populacionais e de infraestrutura em estudo no portal site do IBGE e MMA, evidenciando os resultados e justificativas através da ferramenta de Geoprocessamento, apontando suas modificações durante o período analisado. O referido trabalho definiu as pressões sofridas na região e apontou que o aumento contínuo da população, tal como a presença de instalações pode resultar em maiores consequências de impacto na área, uma vez que, o acesso a condições básicas de higiene e saúde é preocupante. O ambiente é relatado como área prioritária para conservação da biodiversidade e Região Nordeste da Mata Atlântica, identificando unidades de conservação com importância biológica alta.

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Section: Resultsunclassified

Ciências agrárias: a multidisciplinaridade dos recursos naturais

2024

Ciências Agrárias: A Multidisciplinaridade Dos Recursos Naturais

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“…The soil is classified as a Cambissolo Húmico/Humic Cambisol [16,17], showing good to moderate drainage and the following characteristics, obtained in the 0-20 cm layer before installation of the experiment: clay content: 28%; pH-H2O: 4.6; SMP index: 4.9; soil organic matter content (SOM): 5.1%; Available phosphorus (P) (by Mehlich 1): 7.9 mg dm -3 ; Exchangeable potassium (K): 186.8 mg dm -3 (by Mehlich 1); Exchangeable aluminum (Al): 2.9 cmolc dm -3 ; Ca: 5.6 cmolc dm -3 ; Magnesium (Mg): 3.2 cmolc dm -3 ; Potential acidity (H+Al): 15.6 cmolc dm -3 ; sum of bases: 9.3 cmolc dm -3 ; CECeffective and CEC pH7.0: 12.2 and 24.8 cmolc dm -3 , respectively.…”

Section: Methodsmentioning

confidence: 99%

Soybean Agronomic Performance Does Not Change with Gypsum Application in a Cambisol Submitted to Water Restriction in Southern Brazil

Brignoli

Gatiboni²,

Mumbach³

et al. 2021

OJAR

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Water stress is a limiting factor for soybean crop development, and it may increase due to subsurface soil acidity. The use of agricultural gypsum is a way to improve the soil chemical conditions at depth and mitigate the undesirable effects caused by water restriction during drought periods. This study aimed to evaluate whether gypsum application increases soybean yield in water restriction conditions. The experiment was implemented in 2018 in a Humic Cambisol, Southern Brazil. The treatments consisted of two gypsum management procedures (with 1.4 Mg ha -1 and without application) associated with two water conditions (with and without water restriction). The water conditions were promoted by partially covering the soil with plastic tarpaulin sheets. Soybean was grown in the crop years 2018/19 and 2019/20 to assess root attributes and yield and were analyzed soil chemical characteristics. Water restriction reduced soybean yield by 11.4 and 36.8% in the 2018/19 and 2019/20 harvests, respectively, whereas there was no response to gypsum application. The plants' root system was not affected by the water conditions or gypsum management. It was concluded that water restriction reduces soybean yield, and agricultural gypsum does not mitigate such loss under the evaluated conditions, even though it positively changes some soil chemical parameters.

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“…The XRF technique consists in inducing electronic transitions to occur the emission of characteristic X-rays, which are separated according to their energy, which is characteristic of each element and its atomic number, and then, are identified and quantified. [3,4] The identification of characteristic X-ray can be done by two main techniques: Wavelength Dispersive X-Ray Fluorescence (WDXRF) and Energy Dispersive X-Ray Fluorescence (EDXRF). The characteristic X-ray intensities (numbers of photons detected per unit time) are related to the concentrations of elements in the sample.…”

Section: Introductionmentioning

confidence: 99%

Study Ofthe Fundamental Parameters of X-Ray Fluorescence and Its Implications in the Quantification of Thin and Thick Samples

Galvão¹,

Neto²,

Feroni³

2019

Blucher Material Science Proceedings

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X-ray fluorescence (XRF) has been widely used in the analysis of the inorganic/metallic composition of samples in the most diverse areas of science. Among some aspects of the XRF principle, X-ray Fluorescence by Dispersive Energy (EDXRF) stands out, due to its low analytical cost, analytical simplicity and the almost non-existent need of preparation and manipulation of the samples previous the analysis. Several variables are related to the fundamental parameters, the method used to quantify the elemental composition of samples analyzed by XRF, as a way of correcting matrix effects that occur inside the samples. Since studied the variables influencing the matrix effect, an adequate form of quantification of the samples can be performed by means of the construction of calibration curves. In the present study, calibration curves were made for the quantification of samples analyzed by EDXRF, using calibration standards with elements deposited in Mylar® films, for 32 elements varying from Na (Z = 11) to Nd (Z = 60). All analyses were performed on a Shimadzu spectrophotometer, model EDX-720/800HS. The results show the quality of the curves obtained for elements separated by groups of atomic number, in which the curves presented coefficients R equal or superior to 0.89. RESUMOA fluorescência de raios X (XRF) tem sido amplamente utilizada em análises da composição

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RÚCULA cv. Apreciatta Folha Larga SUBMETIDA A DOSES DE FÓSFORO

Cited by 5 publications

References 5 publications

Ciências agrárias: a multidisciplinaridade dos recursos naturais

Ciências agrárias: a multidisciplinaridade dos recursos naturais

Soybean Agronomic Performance Does Not Change with Gypsum Application in a Cambisol Submitted to Water Restriction in Southern Brazil

Study Ofthe Fundamental Parameters of X-Ray Fluorescence and Its Implications in the Quantification of Thin and Thick Samples

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