Water magnetization and phosphorus transport parameters in the soil

Generoso, Tarcila Neves; Martinez, Mauro Aparecido; Rocha, Genelício Cruzoé; Hamakawa, Paulo José

doi:10.1590/1807-1929/agriambi.v21n1p9-13

Cited by 6 publications

(7 citation statements)

References 9 publications

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“…In years with excessive rainfall, yield variability tends to be intensified (Sana et al 2014). The transport of P is dependent on soil moisture, contributing to the response of P being one of the properties with a higher correlation with yield (Generoso et al 2017). Also, the P availability resulted in a higher number of the capsule and hence higher production.…”

Section: Correlation Among Properties and Yieldmentioning

confidence: 99%

Correlations and Principal Components Analysis for Defining Management Zones in Cotton

Baio

Faraun

Teodoro

et al. 2020

BJD

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One approach for using variable rate fertilizer applications in precision agriculture is to divide an area into management zones. The objectives were: (i) to identify the chemical, physical and phenological properties that have the highest correlation with the yield; (ii) to use principal component analysis (PCA) to identify what physical, chemical, and phenological properties contribute to greater spatial variability; (iii) and to use these variables in the establishing management zones (MZ) for cotton through fuzzy k-means clustering analysis, associated with the geostatistics technique by the ordinary kriging method. The experiment was carried out in a cotton field in the Chapadões region in 2015. Phenological variables of cotton (plant height, number of bolls, number of capsules, opening percentage and Red Edge vegetation index) and chemical (pH, Ca, Mg, H+Al, V%, Ca/Mg, CEC, K, Al3+ and P) and physical (total soil porosity, soil density, soil moisture, soil mechanical resistance to penetration, clay content, and macro and micro-porosity) attributes of the soil were evaluated to define management zones. The variables that showed the highest correlation with cotton yield were pH, phosphorus, soil moisture measured at 39 and 70 days after cotton emergence (DAE), number of bolls at 107 DAE and red edge vegetation index at 53 DAE. The map with four MZ has a better

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Section: Correlation Among Properties and Yieldmentioning

confidence: 99%

Correlations and Principal Components Analysis for Defining Management Zones in Cotton

Baio

Faraun

Teodoro

et al. 2020

BJD

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“…Pela Tabela 13 podem ser conferidos os parâmetros de transporte do fósforo nas alturas de 10 e 20 cm, os quais foram obtidos por meio do ajuste numérico pelo código CFITIM (van Genuchten, 1981 (Mansell et al, 1985). Generoso et al (2017) (Costa and Bigham, 2009) que retêm o ânion PO4 3-; e de caulinita, cujo soluto possuí forte interação com a superfície hidroxiladas das bordas da caulinita (Melo and Wypych, 2009). Essas características são responsáveis pela maior retenção do fósforo pelo solo LVA.…”

Section: Fósforounclassified

“…Para avaliar os parâmetros de transporte do fósforo, Generoso et al (2017) utilizaram colunas com altura de 20 cm com três concentrações do soluto para cada solo e obtiveram a variação do fator de retardamento de 8,64 a 11,70 e de 1,52 a 2,03 nos solos argiloso e arenoso, respectivamente, os maiores valores foram nas concentrações menor e intermediária do soluto e a maior retenção do íon PO4 3foi no solo argiloso, como visto no presente trabalho. (1986) obtiveram o parâmetro Kd para dois Esposodossolos de 0,125 a 0,380 cm 3 g -1 para o íon PO4 3em colunas de 10 cm; uma baixa interação dos colóides com o soluto foi apresentada e os valores do parâmetro foram semelhantes aos encontrados para o solo arenoso PVAd.…”

Section: Fósforounclassified

“…os maiores valores foram obtidos nas concentrações menor e intermediária do soluto, e a maior interação dos colóides com o íon ocorreu no solo argiloso (Generoso et al, 2017). Os valores do parâmetro no solo arenoso foram semelhantes aos encontrados nesta pesquisa.…”

Section: Fósforounclassified

“…Comparação entre médias dos tratamentos pelo teste Tukey significativo a 5% para o coeficiente de dispersão do íon P-PO4 3-. respectivamente, em colunas com altura de 14 cm, sendo os valores superiores aos encontrados para os solos arenosos (Mansell et al, 1985). Araujo et al (2000) obtiveram a variação dos coeficientes de dispersão de 0,099 a 0,723 cm 2 min - Generoso et al (2017) encontraram os parâmetros D em três concentrações distintas do íon PO4 3em colunas com altura de 20 cm, sendo a variação de 0,933 a 1,792 e de 0,891 a 2,980 cm 2 min -1 para os solos argiloso e arenoso, respectivamente, os maiores valores foram observados nas menores concentrações do soluto e a maior dispersão do fósforo ocorreu no solo arenoso, como visto no presente trabalho.…”

Section: Fósforounclassified

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Efeito da composição físico-química e mineralógica de solos sobre a dinâmica dos íons nitrato, fósforo e potássio

Grecco¹

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Effect of physicochemical and mineralogical composition of soils on the dynamics of nitrate, phosphorus and potassium ions Fertilizer is applied to provide nutrients (solutes) for plants in required quantities, and at the right time, to facilitate economically viable agricultural production. However, in some cases excessive quantities of fertilizers are applied. Such overapplication can result in runoff and ions leaching through the soil profile, where they are unavailable to plants, and can cause surface water pollution by water erosion and eutrophication, besides of groundwater contamination and soil acidification. To avoid these environmental impacts, it is necessary to characterize the transport parameters that govern the dynamic of solutes in soil profile. These parameters are influenced by porous media properties, such as mineralogical composition of soils, that regulate the retention or dispersion of ions. The objective of this study was to evaluate the effect of physicochemical and mineralogical composition of soils on transport parameters of nitrate, phosphorus, and potassium, estimated by using the CFITIM code inside of STANMOD (STudio of ANalytical MODels) software to fit BTC's. Besides that, using of columns with different heights (10 and 20 cm) and recommended the columns height with accuracy under transport parameters by numerical simulations of the BTC's using the HYDRUS-1D model. The research was conducted in the Department of Biosystems Engineering, University of São Paulo (USP/ESALQ). The treatments were a 5 x 2 factorial with five soils and two column heights for each individual solute. The experimental design was random blocks, with three blocks, totaling 30 plots for each solute. For analysis of results, the transport parameters were submitted a variance analysis and the evaluation of model performance by statistical indexes: Root Mean Square Error (RMSE), Mean Absolute Error (MAE) and Determination Coefficient (R 2). The dispersion coefficient for PV soil were significantly different from those for other soils, for all ions. In front of the different heights of the columns, PV, PVAe, NV and PVAd soils showed significant differences in retardation factor, and distribution and dispersion coefficients, for nitrate and potassium ions. The parameters obtained from 20 cm columns were accurate than those obtained from 10 cm height, based on adequate performance of HYDRUS-1D model in BTC's simulations of sandy and clay soils.

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Magnetically treated water affects Melissa officinalis L growth, nutritional status and essential oil compounds

Medeiros,

Assis,

Boeira

et al. 2023

Journal of Cleaner Production

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Water magnetization and phosphorus transport parameters in the soil

Cited by 6 publications

References 9 publications

Correlations and Principal Components Analysis for Defining Management Zones in Cotton

Correlations and Principal Components Analysis for Defining Management Zones in Cotton

Efeito da composição físico-química e mineralógica de solos sobre a dinâmica dos íons nitrato, fósforo e potássio

Magnetically treated water affects Melissa officinalis L growth, nutritional status and essential oil compounds

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