Qualidade ambiental em solo com diferentes ciclos de cultivo do meloeiro irrigado

Maia, Celsemy Eleutério

doi:10.1590/s0103-84782013000400007

Cited by 12 publications

(26 citation statements)

References 12 publications

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“…The physical, chemical and biological properties of soil have been used as quality indicators to evaluate environmental sustainability (DORAN; CHAER;TÓTOLA, 2007;MAIA, 2013). Among them, soil organic matter (SOM) is one of the key indicators of sustainability and environmental quality in agroecosystems (ROSSI et al, 2011), and can be analyzed by chemical or physical fractionation.…”

Section: Introductionmentioning

confidence: 99%

Spatialization of Fractions of Organic Matter in Soil in an Agroforestry System in the Atlantic Forest, Brazil

Silva

Pereira

Delgado

et al. 2017

CERNE

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This study aimed to spatialize fractions of organic matter of soil in an agroforestry system (AFS) located in the Atlantic Forest in Brazil. Thirty-one soil samples were collected at depths of 0-10, 10-20 and 20-40 cm from georeferenced collection points. We determined total organic carbon (TOC), particulate carbon (COp), carbon associated with clay and silt (COam), carbon content in the fulvic acid fraction (C-FAF), humic acid fraction (C-HAF) and humin fraction (C-HUM). Semivariogram analysis and model adjustment were carried out using ArcGIS 10.2 software. Subsequently, spatial interpolation was performed using Ordinary Kriging. We observed spatial dependence for all variables except for TOC and COp at the 0-10 cm depth, which presented a pure nugget effect. It was possible to observe modifications in the distribution of humic substances in the study area. The results from this study are similar to those of other studies conducted in naive areas in the Atlantic Forest, demonstrating the benefits of using the agroforestry system. ESPACIALIZAÇÃO DAS FRAÇÕES DA MATÉRIA ORGÂNICA DO SOLO SOB UM SISTEMA AGROFLORESTAL, NA MATA ATLÂNTICA, BRASIL RESUMO: Este estudo teve como objetivo espacializar as frações da matéria orgânica do solo em um sistema agroflorestal (SAF) localizado na Mata Atlântica. Foram coletadas trinta e uma amostras de terra nas profundidades de 0-10, 10-20 e 20-40 cm, sendo cada ponto georeferenciado. Foram determinados os teores de carbono orgânico total (COT), carbono particulado (COp), carbono associado a argila e silte (COam), teor de carbono na fração de ácido fúlvico (C-FAF), fração de ácido húmico (C-FAH) e fração de humina (C-HUM). A análise dos semivariogramas e o ajuste do modelo foram realizados utilizando o software ArcGIS 10.2. Posteriormente foi realizada a interpolação espacial através de Krigagem Ordinária. Foi observada dependência espacial para todas as variáveis, com exceção do COT e COp na profundidade de 0-10 cm, visto que apresentaram efeito pepita puro. Foram verificadas modificações na distribuição das substâncias húmicas na área de estudo. Os resultados deste estudo são semelhantes aos de outros realizados em áreas de Mata Atlântica, demonstrando os benefícios do uso do sistema agroflorestal.

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Section: Introductionmentioning

confidence: 99%

Spatialization of Fractions of Organic Matter in Soil in an Agroforestry System in the Atlantic Forest, Brazil

Silva

Pereira

Delgado

et al. 2017

CERNE

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“…In irrigated muskmelon crop areas, Maia (2013) found that application of irrigation and heavy P fertilization over 10 crop cycles increased the pH from 5.04 in original native forest to values of > 7.0 in the cultivated areas, and available P concentrations increased from 0.60 mg dm -3 to more than 60 mg dm -3 . In contrast, K deficiency was mainly due to high Ca and Mg soil concentrations.…”

Section: Resultsmentioning

confidence: 99%

“…In 24 % of the low-yield areas, Ca deficiency was detected, which is probably not due to a lack of the element but to the decreased soil availability of the element because of its lower solubility, even when the soil concentrations of the element are high and despite its application through irrigation water. Over several crop cycles, increasing Ca and Mg concentrations in soil with irrigated muskmelon were observed by Maia (2013), who assumed that this increase was due to the quality of the irrigation water.…”

Section: Resultsmentioning

confidence: 99%

Boundary Line Model to Estimate the Nutrient Sufficiency Range in Muskmelon Leaves

Maia

Morais

2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The boundary line is a method frequently used to assess the nutritional status of plants when the relationship between the variables under analysis is influenced by other interacting factors. The objective of this study was to propose and test the boundary line model to estimate the nutrient sufficiency range and nutritional status of irrigated muskmelon. The lower and upper limits of the sufficiency range were calculated as a basis for assessment of the nutritional status of muskmelon. Leaf material was collected from 70 muskmelon crop areas in northern Brazil. The nutrient (N, P, K, Ca, Mg, S, Fe, Zn, Mn, B, and Cu) concentrations in the leaf tissue and the respective fruit yield of each area were measured. The proposed model to estimate the boundary line allowed estimation of the sufficiency range of nutrients for irrigated muskmelon. The main growth-limiting factors of muskmelon due to nutritional deficiency were P > N = K, and those caused by nutrient excess were N > Zn = Cu.

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“…In soils with pH higher than 5, more than 90% of picloram molecules are in the anionic phase, that is, they are less sorbed by organic matter and clays of the soil negative charge, being likely to be leached (Cheung and Biggar, 1974). Maia (2013) has observed an increase in soil pH in an agricultural area irrigated with water rich in calcium carbonate.…”

Section: Picloram + 24-d Leaching Testmentioning

confidence: 99%

Biosolids in Leaching of Herbicides Mimicking Auxin in Tropical Soils

et al. 2018

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-Biosolids are residues from the treatment of urban fluids used as a source of nutrients for agricultural and forestry crops. The organic matter contained in this residue and its chemical characteristics may interfere with the behavior of herbicides in the soil. The objective of this study was to evaluate the influence of biosolids on the potential for leaching herbicides mimicking auxin. Two simultaneous experiments were performed: a leaching test of picloram + 2.4-D in soil column with addition of thermally treated biosolids or solarized biosolids and another one to evaluate the effect of leachate application from the leaching tests under inert material. Each type of biosolid was incorporated in sandy soil in the proportions of 0%, 50%, 100% and 150% of the maximum recommended dose for subsurface fertilization for eucalyptus. The soil was conditioned in PVC columns and the herbicide columns based on picloram + 2.4-D (Turuna® Commercial Formulation), corresponding to 240 g L -1 of 2.4-D + 64 g L -1 of picloram at a dose of 3.5 L ha -1 of the commercial product. The columns were submitted to rain simulation and the resulting leachate was collected, followed by its application in sand-filled pots. The Cucumis sativus was sown along the profile of the soil columns and in the pots. The incorporation of the biosolid, independently of the type and dose tested did not interfere in the leaching potential of picloram + 2.4-D. Symptoms of intoxication were observed along all soil columns and pots. Therefore this residue is not very effective for the resolution of environmental problems caused by the leaching of auxin-mimicking herbicides in the soil. Keywords

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Qualidade ambiental em solo com diferentes ciclos de cultivo do meloeiro irrigado

Cited by 12 publications

References 12 publications

Spatialization of Fractions of Organic Matter in Soil in an Agroforestry System in the Atlantic Forest, Brazil

Spatialization of Fractions of Organic Matter in Soil in an Agroforestry System in the Atlantic Forest, Brazil

Boundary Line Model to Estimate the Nutrient Sufficiency Range in Muskmelon Leaves

Biosolids in Leaching of Herbicides Mimicking Auxin in Tropical Soils

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