Consulta: subjectFacets:"Leaching"
Registros recuperados: 40
Data/hora: 07/06/2024 06:40:19

Azufre, nitratos, nutrición de cultivos forrajeros y fertilidad de un suelo salido-sódico
Provedor de dados: 32
Autores: López Blancas, Sergio.
En la recuperación de suelos salino-sódicos con aplicación de S y establecimiento de cultivos tolerantes, los nitratos pueden lixiviarse en el perfil del suelo o acumularse en el tejido vegetal. Esto podría reducirse mediante la promoción de la oxidación del S aplicado, ya que con ello se favorece la desnitrificación y la absorción de sulfatos por los cultivos, limitando la acumulación de nitratos en el suelo y en las plantas, respectivamente. El objetivo del presente trabajo fue determinar el efecto del S en: la lixiviación de nitratos en el perfil del suelo, la concentración de S, nitratos y micronutrimentos del tejido vegetal, la fertilidad del suelo y el rendimiento de especies forrajeras en un suelo salino-sódico. Se establecieron parcelas con...
Tipo: Tesis
Palavras-chave: Lixiviación; Sulfatos; Recuperación de suelos; Maestría; Edafología; Leaching; Sulfates; Soil recovery.
Ano: 2009
URL: http://hdl.handle.net/10521/1550

Evaluación del manejo del nitrógeno en el agroecosistema caña de azúcar.
Provedor de dados: 32
Autores: Moreno Seceña, Juan Carlos.
El uso excesivo del fertilizante nitrogenado en caña de azúcar (Saccharum officinarum L) es fuente de contaminación de acuíferos. El objetivo del presente estudio fue evaluar la productividad, rentabilidad y cantidad de nitrógeno lixiviado en caña de azúcar, bajo la aplicación fraccionada de dosis de nitrógeno; así como la actitud de los productores cañeros hacia este manejo. El estudio se realizó en el Módulo de Riego I-1 La Antigua, Veracruz, incluyendo las fases siguientes: 1) Diagnóstico. Se identificó la actitud de productores a través de una encuesta que se aplicó a una muestra de 250 cañeros; y 2) Experimental. Se evaluaron nueve tratamientos que resultaron de los factores siguientes: dosis (250, 200 y 150 kg ha-1 de N) y fraccionamientos (2, 3 y...
Palavras-chave: Saccharum officinarum L.; Fertilizante nitrogenado; Actitud; Lixiviación; Nitrogen fertilizer; Attitude; Leaching; Agroecosistema caña de azúcar; Doctorado; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/188

Evaluación del manejo del nitrógeno en el agroecosistema caña de azúcar.
Provedor de dados: 32
Autores: Moreno Seceña, Juan Carlos.
El uso excesivo del fertilizante nitrogenado en caña de azúcar (Saccharum officinarum L) es fuente de contaminación de acuíferos. El objetivo del presente estudio fue evaluar la productividad, rentabilidad y cantidad de nitrógeno lixiviado en caña de azúcar, bajo la aplicación fraccionada de dosis de nitrógeno; así como la actitud de los productores cañeros hacia este manejo. El estudio se realizó en el Módulo de Riego I-1 La Antigua, Veracruz, incluyendo las fases siguientes: 1) Diagnóstico. Se identificó la actitud de productores a través de una encuesta que se aplicó a una muestra de 250 cañeros; y 2) Experimental. Se evaluaron nueve tratamientos que resultaron de los factores siguientes: dosis (250, 200 y 150 kg ha-1 de N) y fraccionamientos (2, 3 y...
Palavras-chave: Saccharum officinarum L.; Fertilizante nitrogenado; Actitud; Lixiviación; Nitrogen fertilizer; Attitude; Leaching; Agroecosistema caña de azúcar; Doctorado; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/188

PERCOLATE QUALITY IN SOIL CULTIVATED WITH APPLICATION OF WASTEWATER FROM SWINE SLAUGHTERHOUSE AND DAIRY PRODUCTS
Provedor de dados: 70
Autores: Oliveira,Jacineumo F. de; Rodrigues,Fernando N.; Fia,Ronaldo; Mafra,Dayana C. B.; Landim,Daniela V.
ABSTRACT The objective of this study was to evaluate the quality of the percolate in soil columns cultivated with Tiffon-grass 85 under different wastewater rates from swine slaughterhouse and dairy. The experiment was conducted at the Department of Engineering at the Federal University of Lavras, in PVC columns with 0.30 m of diameter and 1.2 m deep, filled with Dark Red Latosol cultivated with Tifton-grass 85. The treatments consisted of a (AQT0) control with recommended chemical fertilization for Tifton-grass 85 (300 kg ha-1 year-1 of N), and four doses of SSW and DPW (100, 200, 300 and 400% of the recommendation) in a CRD with 3 replications. The samples of percolated were collected and characterized weekly. The treatments of highest dosage have...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water reuse; Wastewater; Leaching; Soil disposal; Agroindustry wastewaters.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601222

APPLICATION EFFECT OF DIFFERENT RATES OF WASTEWATER FROM GELATIN PRODUCTION IN THE CHEMICAL ATTRIBUTES OF THE SOIL
Provedor de dados: 70
Autores: Silvano,Caroline; Freitas,Paulo S. L.; Rezende,Roberto; Mioto,Liliane S.; Dallcort,Rivanildo.
ABSTRACT The gelatin industry wastewater has nutrients in its composition, allowing its use in agriculture as an alternative to disposal and recycling of this residue. However, high application rates can cause the accumulation of elements such as sodium in the soil, and generate negative impacts on the environment. This study aimed to evaluate the effects of the application of rates up to 600 m3ha-1 of gelatin industry wastewater in soil columns, on soil chemical attributes in five depths. The experiment was conducted in a greenhouse, in PVC tube columns (0.20 m diameter) filled with distroferric Red Nitosol soil, of very clayey texture. The treatments consisted of increasing rates of wastewater equivalent to 0, 150, 300, 450 and 600 m3 ha-1, with a single...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertirrigation; Leaching; Sodium; Soil fertility.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400606

Nutrient loss in composting of agroindustrial residues
Provedor de dados: 70
Autores: Carneiro,Leocir J.; Costa,Mônica S. S. de M.; Costa,Luiz A. de M.; Martins,Marcos F. L.; Rozatti,Marcos A. T.
The management of composting may influence the characteristics of the produced compounds. The experiment used three frequencies of plowing, combined with the conditions: with and without coverage of the composting patio, with and without the use of commercial inoculant, resulting in 12 furrows, installed on the Experimental Center of Agricultural Engineering (NEEA), of the STATE UNIVERSITY OF WEST PARANÁ (UNIOESTE), Campus of Cascavel city - state of Paraná (PR), in Brazil. The waste and quantities used in kg were: corn cob (7.5); hatchery residue (5); floater sludge (31); ash (1); wheat cleaning residue (120); wheat pre-cleaning residue (120); corn peel (7.5); solid fraction of wash trucks used to transport chickens (2); solid fraction of pig manure (1)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Volatilization; Leaching; Inoculation; Turn of plowing.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400019

COMPOSTING PROCESS IN THE PRODUCTION OF LETTUCE SEEDLING SUBSTRATES: EFFECT OF COVERING AND TURNING FREQUENCY
Provedor de dados: 70
Autores: Ripp,Paula G.; Gusmão,Ana P.; Lorin,Higor E. F.; Costa,Mônica S. S. de M.; Edwiges,Thiago.
ABSTRACT The composting of waste from a broiler chicken production chain (BCPC) promotes the mitigation of environmental impacts and allows the commercialization of compost as an agricultural input. Both the characteristics and the potential for use of the final compost depends on the operational conditions during composting. The objective of this study was to evaluate the use of organic compounds generated from composting BCPC residues and the pruning debris of urban trees in the germination and initial growth of lettuce seedlings. Six organic substrates obtained under different coverage conditions (presence and absence) and number of turns (8, 12, and 16) were evaluated using the germination index (IG) and Dickson quality index (DQI) for the production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental conditions; Leaching; Seed germination index; Dickson quality index.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000500562

Effect of companion ion on nitrate displacement through transport parameters analysis
Provedor de dados: 70
Autores: SILVA,LÍVIA P. DA; MIRANDA,JARBAS H. DE; OLIVEIRA,LUCIANO A.; JOSÉ,JEFFERSON V.
Nitrate is the main form of nitrogen associated with water contamination; the high mobility of this species in soil justifies the concern regarding nitrogen management in agricultural soils. Therefore, the objective of this research was to assess the effect of companion cation on nitrate displacement, by analyzing nitrate transport parameters through Breakthrough Curves (BTCs) and their settings made by numerical model (STANMOD). The experiment was carried out in the Soil and Water Quality Laboratory of the Department of Biosystems Engineering, "Luiz de Queiroz" College of Agriculture in Piracicaba (SP), Brazil. It was performed using saturated soil columns in steady-state flow condition, in which two different sources of inorganic nitrate Ca(NO3)2 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breakthrough curves; Solute dynamics; Leaching.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100051

Minitomato cultivation with substrate under different fertigation management strategies
Provedor de dados: 75
Autores: Bezerra,Ricardo S; Evangelista,Adão Wagner P; Alves Júnior,José; Nascimento,Abadia R; Casaroli,Derblai.
ABSTRACT The application of high level of fertilization and inadequate management of fertigation in tomato crop can promote increase of salinity of the solution, nutritional imbalance and physiological disorders in the plants, consequently reduces the productivity and the quality of the fruits. The aim of this study was to evaluate different fertigation strategies in growth and production of mini tomato plants cultivated with substrate in a greenhouse. The experimental design was in randomized complete blocks with four treatments and twenty replicates. The treatments corresponded to four fertigation strategies, as follows: T1 [(control) fertigation with leaching of 20%]; T2 fertigation throughout the day and irrigation at the end of the day with leaching...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Salinity; Leaching.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000100088

Determinação dos fatores de retardamento e dispersão de potássio em Latossolo Amarelo de textura muito argilosa.
Provedor de dados: 14
Autores: HASHIMOTO, C. V.; TEIXEIRA, W. G.; ENCINAS, O. C.; TAVARES, S. R. de L.
O conhecimento da dinâmica dos nutrientes adicionados no solo via adubação é crucial para o adequado manejo da nutrição das plantas, bem como para avaliar riscos de contaminação do solo e das águas subterrâneas com a aplicação de efluentes. O estudo teve como objetivo avaliar a dinâmica do deslocamento de íons potássicos em amostras de um Latossolo Amarelo muito argiloso, caulinítico, que é a classe de solo dominante na Amazônia Central. Foram determinados os parâmetros de transporte de solutos em amostras de solos de uma camada superficial (0-20 cm) e de uma camada subsuperficial (20-40 cm), por meio de ensaios de retardo (breakthrough curves - BTC). As equações apresentaram um bom ajuste nos pontos da curva de distribuição de efluentes dos ensaios...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Breakthrough curves; STANMOD; Análise do Solo; Latossolo Amarelo; Potássio; Lixiviação; Adubação; Leaching; Fertilizers.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135104

Comportamento ambiental de dois inseticidas em um solo de Mato Grosso do Sul: experimentação e modelagem matemática.
Provedor de dados: 14
Autores: SCORZA JUNIOR, R. P.; RIGITANO, R. L. de O.; FRANCO, A. A.
Informações sobre o comportamento de pesticidas são importantes para o conhecimento do seu destino ambiental e, consequentemente, para a avaliação da sustentabilidade dos sistemas de produção agrícolas. Este trabalho teve os seguintes objetivos: (i) quantificar a lixiviação de dois inseticidas (endossulfam e tiametoxam) em uma área de plantio de soja na região de Ponta Porã, MS; (ii) avaliar a degradação e sorção dos dois inseticidas no solo em estudo; e (iii) testar e calibrar os simuladores MACRO e PEARL para descrever os dados observados da lixiviação dos dois inseticidas nas condições consideradas. Amostras de solo para quantificação da lixiviação dos pesticidas foram coletadas nas profundidades de 0-10 cm, 10-30 cm, 30-50 cm, 50-70 cm e 70-100 cm aos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Degradação do solo.; Lixiviação.; Degradation; Leaching; Soil.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/880300

Movimentacao de herbicidas no solo aplicados via herbigacao na cultura do feijao em plantios direto e convencional.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SILVA, A. A. da; VIEIRA, R. F.; RAMOS, M. M.
bitstream/CPAC-2009/24716/1/doc_54.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Planta daninha; Zero tillage.; Controle Químico; Feijão; Herbicida; Lixiviação; Phaseolus Vulgaris; Plantio Direto; Solo.; Chemical control; Beans; Fomesafen; Herbicides; Conventional tillage; Leaching; Metolachlor; Soil; Weeds.; Weed control.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546459

Additives incorporated into urea to reduce nitrogen losses after application to the soil
Provedor de dados: 86
Autores: Rech,Ioná; Polidoro,José Carlos; Pavinato,Paulo Sérgio.
Abstract: The objective of this work was to develop urea-based fertilizers with internal incorporation of urease inhibitors and other additives in the granule. The effects of the incorporation of NBPT, copper (Cu+2), boric acid (H3BO3), elemental sulphur (Sº), and a clay mineral from the zeolite group in powder urea - with ten different combinations of these additives - were evaluated as to N losses by volatilization and leaching. The losses in laboratory-developed formulations were compared with those of commercial fertilizers coated with the same additives (Super N, FH Nitro Mais, and FH Nitro Gold). The evaluations were made in greenhouse conditions, using a Ultisol accommodated in PVC columns. Nitrate and ammonium leaching was evaluated in the solution...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonia volatilization; Leaching; NBPT; Nitrogen fertilizers; Urease inhibitors.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000300194

Carryover of Imazethapyr + Imazapic on Ryegrass and Non-tolerant Rice as Affected by Thickness of Soil Profile
Provedor de dados: 87
Autores: Bundt,A.D.C.; Avila,L.A.; Agostinetto,D.; Nohatto,M.A.; Vargas,H.C.
Herbicides used in Clearfield(r) rice system may persist in the environment, damaging non-tolerant crops sown in succession and/or rotation. These damages vary according to soil characteristics, climate and soil management. The thickness of the soil profile may affect carryover effect; deeper soils may allow these molecules to leach, reaching areas below the roots absorption zone. The aim of this study was to evaluate the effect of the thickness of soil profile in the carryover of imazethapyr + imazapic on ryegrass and non-tolerant rice, sown in succession and rotation to rice, respectively. Lysimeters of different thicknesses (15, 20, 30, 40, 50 and 65 cm) were constructed, where 1 L ha-1 of the imazethapyr + imazapic formulated mixture was applied in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degradation; Imidazolinone; Lolium multiflorum; Leaching; Oryza sativa.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200357

Dynamics of diuron and sulfentrazone formulations in soils with different textures
Provedor de dados: 87
Autores: A. Matos,Ana K.; Carbonari,Caio A.; F.S. Brito,Ivana P.; L.G.C. Gomes,Giovanna; B. Trindade,Maria L.; D. Velini,Edivaldo.
Abstract  Background:  The use of commercial mix and tank mix with two or more herbicides is a widespread practice. However, despite its several possible benefits, little is known about its effect on the behavior of the molecules in the soil, which can increase or reduce the leaching potential of these molecules.  Objective:  This study evaluated the leaching potential of the herbicides diuron and sulfentrazone applied, using commercial mix and tank mix, in soils with different textures.  Methods:  The herbicides diuron (1,750 g ha-1) and sulfentrazone (875 g ha-1) were applied in three soils with different textures (clayey, medium, and sandy), using a commercial mix (Stone®) and a tank mix (Herburon 500 BR + Boral®). Subsequently, the treated soils were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Leaching; Commercial mix; Tank mix.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100318

Soil Persistence of Chlorimuron-Ethyl and Metsulfuron-Methyl and Phytotoxicity to Corn Seeded as a Succeeding Crop
Provedor de dados: 87
Autores: Carvalho,S.J.P.; Soares,D.J.; Lopez-Ovejero,R.F.; Christoffoleti,P.J.
Two experiments were carried out to evaluate soil persistence of chlorimuron-ethyl and metsulfuron-methyl and phytotoxicity to corn seeded as a succeeding crop. One experiment was conducted with chlorimuron-ethyl applied at 20 g ha-1, and one with metsulfuron-methyl applied at 3.96 g ha-1. Treatments were arranged in a factorial design with two types of soil (sandy and clay), three irrigation regimes (daily, weekly and no irrigation) and four application timings (90, 60 and 30 days before corn seeding, as well as untreated plots). Soil persistence of the herbicides was influenced by water availability, molecule water solubility (leaching potential) and application timings prior to corn seeding. In sandy soil, with adequate water availability, leaching...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carryover; Leaching; Microbial degradation; Dynamics.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200331

SALMOD, a Salinity Management Tool for Irrigated Agriculture
Provedor de dados: 31
Autores: Armour,   R.J.; Viljoen,   Machiel F.
This paper presents an irrigation farm management tool, SALMOD (Salinity And Leaching Model for Optimal irrigation Development), that calculates the profit maximizing crop enterprise composition and irrigation management options for farm specific soil type, drainage status and irrigation system composition subject to various regional control measures and expected irrigation water salinities. After stating the water quality problem, and particularly salinisation in Southern Africa, the input data requirements and the results of SALMOD and their usefulness at farm level, are discussed. The impact of various possible regional or policy regulations are then discussed. SALMOD was developed for irrigators in the lower Vaal and Riet Rivers in South Africa. These...
Tipo: Conference Paper or Presentation
Palavras-chave: Irrigation; Water quality; Return flows; Salinisation; Leaching; Non-point source pollution; On-farm storage; SALMOD; Linear programming; GAMS; Farm Management; Land Economics/Use.
Ano: 2002
URL: http://purl.umn.edu/7012

Integrated water resource systems:  Theory and policy implications
Provedor de dados: 31
Autores: Keller,   Andrew; Keller,   Jack; Seckler,   David.
Presents the concept of integrated water resources systems (IWS) as clearly and simply as possible, with a focus on the irrigation sector-the largest and most complex user of water.
Tipo: Report
Palavras-chave: Water resource management; Water policy; Irrigation efficiency; Water demand; Leaching; Water use efficiency; Water supply; Evapotranspiration; Models; Water conservation; Crop Production/Industries; Farm Management; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies.
Ano: 1996
URL: http://purl.umn.edu/52730

TRADABLE PERMITS FOR CONTROLLING NITRATES IN GROUNDWATER AT THE FARM LEVEL: A CONCEPTUAL MODEL
Provedor de dados: 31
Autores: Morgan,   Cynthia L.; Coggins,   Jay S.; Eidman,   Vernon R.
Nitrate contamination of municipal and domestic well water supplies is becoming an increasing problem in many rural and urban areas, raising the cost of providing safe drinking water. The objective of this paper is to describe a marketable permit scheme that can effectively manage nitrate pollution of groundwater supplies for communities in rural areas without hindering agricultural production in watersheds. They key to implementing this scheme is being able to link nitrate leaching from nitrogen fertilizer applied to crops at a farm to nitrate levels measured at a drinking water well.
Tipo: Journal Article
Palavras-chave: Agriculture; Groundwater pollution; Leaching; Nitrates; Pollution trading; Environmental Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/15488

Maize response to nitrogen fertilization timing in two tillage systems in a soil with high organic matter content
Provedor de dados: 90
Autores: Sangoi,Luis; Ernani,Paulo Roberto; Silva,Paulo Regis Ferreira da.
No-tillage systems, associated to black oat as preceding cover crop, have been increasingly adopted. This has motivated anticipated maize nitrogen fertilization, transferring it from the side-dress system at the stage when plants have five to six expanded leaves to when the preceding cover crop is eliminated or to maize sowing. This study was conducted to evaluate the effects of soil tillage system and timing of N fertilization on maize grain yield and agronomic efficiency of N applied to a soil with high organic matter content. A three-year field experiment was conducted in Lages, state of Santa Catarina, from 1999 onwards. Treatments were set up in a split plot arrangement. Two soil tillage systems were tested in the main plots: conventional tillage (CT)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Nitrogen; Immobilization; Leaching; Grain yield.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000300011

Retention and Solute Transport Properties in Disturbed and Undisturbed Soil Samples
Provedor de dados: 90
Autores: Silva,Lívia Previatello da; van Lier,Quirijn de Jong; Correa,Marcus Metri; Miranda,Jarbas Honorio de; Oliveira,Luciano Alves de.
ABSTRACT Solute transport parameters can be determined in miscible displacement experiments, usually performed in columns with disturbed (sieved) soil samples. Experiments with undisturbed samples are uncommon, due to the difficulty of taking undisturbed samples at the size required for these experiments. Structural alteration of the disturbed material implies modifications in the pore geometry that determines hydraulic properties, including hydraulic conductivity and retention and properties related to miscible displacement. An existing model for prediction of breakthrough curves based on retention properties was tested using material from a medium-textured Ferralsol, and alterations caused by sample disturbance were investigated. Soil water retention...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sampling; Retention; Miscible displacement; Solute transport; Leaching.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100421

Soil Solution Nutrient Availability, Nutritional Status and Yield of Corn Grown in a Typic Hapludox under Twelve Years of Pig Slurry Fertilizations
Provedor de dados: 90
Autores: Grohskopf,Marco André; Cassol,Paulo Cezar; Corrêa,Juliano Corulli; Albuquerque,Jackson Adriano; Ernani,Paulo Roberto; Mafra,Maria Sueli Heberle; Mafra,Álvaro Luiz.
ABSTRACT Nutrient content in soil solution may vary in response to the applied amount of pig slurry (PS). Thus, the aim of this research was to evaluate the nutrient content in soil solution and its relationship to nutritional status and yield of corn under 12 years of annual fertilization with increasing doses of PS, soluble mineral fertilizer (MF) and PS combined with MF. The experiment was conducted under field conditions in a Latossolo Vermelho Distroférrico (Typic Hapludox). The treatments consisted of pig slurry at annual rates of 50 and 100 m3 ha-1 (PS50 and PS100), soluble mineral fertilizer (MF), and pig slurry at a rate of 25 m3 ha-1 complemented with mineral fertilizer (PS25 + MF), distributed in a randomized block design. Soil solution was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic fertilizer; Manure; Leaching.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100531

Nutrient Release, Plant Nutrition, and Potassium Leaching from Polymer-Coated Fertilizer
Provedor de dados: 90
Autores: Bley,Henrique; Gianello,Clesio; Santos,Lenio da Silva; Selau,Lisiane Priscila Roldão.
ABSTRACT The increase in food consumption and limitations in food production areas requires improved fertilizer efficiency. Slow- or controlled-release fertilizers are an alternative for synchronizing nutrient availability with the plant demands, reducing losses to the environment. The aim of this study was to evaluate the efficacy of polymer-coated KCl compared with conventional KCl. The products were incubated in soil under controlled conditions to evaluate the time required for nutrient release. A greenhouse experiment was performed with corn plants in pots with loamy sand- or clay-textured soil types to evaluate plant nutrition and losses due to leaching. The K application rates were 0, 18, 36, and 54 mg dm-3. The pots were irrigated, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enhanced efficiency; Slow- or controlled-release; Leaching.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100509

Changes in chemical properties of distrophic Red Latosol as result of swine wastewater application
Provedor de dados: 91
Autores: Cabral,Juarez R.; Freitas,Paulo S. L. de; Rezende,Roberto; Muniz,Antonio S.; Bertonha,Altair.
Swine wastewater (SW) has characteristics that allow its disposal in the soil as a fertilizer. This is an alternative in order not to accumulate this material in the farm as well as it provides savings with mineral fertilizers. The aim of this study was to evaluate the effect of applying swine wastewater on the chemical properties of a distrophic Red Latosol for two seasons. The experiment was carried out under field conditions with treatments defined as T0 = 0 (control), T1 = 150, T2 = 300, T3 = 450, T4 = 600, T5 = 750 m3 ha-1 of SW applied during the crop cycle of elephant grass. SW application contributed to the increase of magnesium and phosphorus and the reduction of soil aluminum in the first season. As for the second season when compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effluent; Environmental impact; Leaching.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000200012

Test of exudates color hues for evaluating the physiological potential of coffee (Coffea arabica L.) seeds
Provedor de dados: 95
Autores: Hilst,Paulo Cesar; Dias,Denise Cunha Fernandes dos Santos; Alvarenga,Eveline Mantovani; Souza,Bruna Luiza de.
Coffee seeds have slow and irregular germination, losing fast their viability during storage, and the standard germination test of these seeds requires at least 30 days. Besides, the results may not reflect the actual physiological quality of these seeds. The objective of this work was to develop a fast and practical test for evaluating the viability of coffee seeds, which is based on the interpretation of different color hues of exudates from seeds. Coffee seeds of the cultivar Catuai 44 from six lots were submitted to germination, accelerated aging, and electrical conductivity tests. In the exudates color hue test, coffee seeds without the parchment and the silvery pellicle (four replications of 10 seeds each) were distributed on top of paper towels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Seed quality; Seed analysis; Germination; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200004

The use of film coating on the performance of treated corn seed
Provedor de dados: 95
Autores: Avelar,Suemar Alexandre Gonçalves; Sousa,Fabianne Valéria de; Fiss,Guilherme; Baudet,Leopoldo; Peske,Silmar Teichert.
The main objective of seed coating technology using polymers is to improve the physical, physiological and sanitary characteristics of seed performance. The objectives of the present study were to determine: the plantability of corn seeds treated with insecticide, fungicide and graphite, covered with a film coating; the dust retention on treated corn seeds; and the leaching of applied products on corn seeds covered by a film coating. Seed plantability was determined by counting the skips and double seeds; dust was determined by using fiberglass paper in mg.100 g-1 of seeds; and the leaching was determined by collecting the material leached in a 10 cm layer of sand after irrigation. The following conclusions were made: seeds covered with film coating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymer; Plantability; Dust; Leaching.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000200001

Variations in the chemical composition of the solution extracted from a Latosol under fertigation with vinasse
Provedor de dados: 124
Autores: Francisco,João Paulo; Folegatti,Marcos Vinícius; Silva,Leonardo Batista Duarte; Silva,Jonathas Batista Gonçalves; Diotto,Adriano Valentim.
ABSTRACT The aim of this work was to evaluate the change in electrical conductivity and pH of a soil solution and its composition, with regard to the levels of nitrate and potassium, in a Latosol cultivated with pineapple and subjected to applications of different levels of vinasse. The experiment was conducted in a greenhouse at the Department of Biosystems Engineering of ESALQ/USP. The treatments comprised the application of five levels of vinasse: T1 - 0 m3 ha-1, T2 - 231 m3 ha-1, T3 - 347 m3 ha-1, T4 - 462 m3 ha-1, and T5 - 578 m3 ha-1. Application was every 20 days, using a localised irrigation system with emitters having a nominal flow rate of 4 L h-1 and spaced 0.40 m apart. The applied doses of vinasse were calculated by following the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effluent; Reuse of water; Leaching.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200229

MOVEMENT OF N0(3)-N AND NH4-N IN AN ANDISOL AND ITS INFLUENCE ON RYEGRASS PRODUCTION IN A SHORT TERM STUDY
Provedor de dados: 127
Autores: Mora,María de la Luz; Cartes,Paula; Núñez,Pedro; Salazar,Mauricio; Demanet,Rolando.
In acids soils, the use of ammonium fertilizers accelerates the acidification processes and decreases both the production and persistence of the pastures. Nitrogen (N) is the most limiting factor for plant growth in most agricultural systems, but also it is one of the major environmental issues worldwide. In Chile, neither systematic studies in the first period of pasture growth and nor N leaching losses associated have been reported. The aims of this study were: (i) to evaluate the effect of the N sources at increasing rates of application on the yield and quality of ryegrass (Lolium perenne) and (ii) to quantify in the short-term the N potential leaching losses and the pH changes throughout the soil profile under field conditions. A field experiment was...
Tipo: Journal article
Palavras-chave: Ammonium; Leaching; Nitrate; Nitrogen; Pasture.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000200005

Atrazine movement in a dark red latosol of the tropics
Provedor de dados: 63
Autores: Souza,M.D. de; Basssoi,L.H.; Bacchi,O.O.S.; Reichardt,K.; Hermes,L.C.; Abakerli,R.B.; Pilotto,J.E.
Atrazine displacement was studied in a soil profile as a function of water movement and time after herbicide application, taking into account possible influence of preferential flow on leaching. The experiment consisted of two 7 x 7m plots of a dark red latosol (Kanduidalfic Eutrudox), located at Piracicaba, SP, Brazil (22º 43'S and 47º 25'W), 250km inside continent, at an altitude of 580m. One plot was previously treated with 1,000 kg/ha of lime, in order to increase base saturation to 88%, and 500kg/ha of gypsum. Each plot was instrumented with tensiometers, neutron probe access tubes and soil solution extractors, in order to monitor water and atrazine flows. Atrazine was applied at the high rate of 6 kg/ha of active principle. Results showed intensive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atrazine; Leaching; Preferential flow; Adsorption; Herbicide; Tropical soil.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300013

The influence of organic matter from swine wastewater on the interaction and transport of alachlor in soil - doi: 10.4025/actasciagron.v35i3.16374
Provedor de dados: 1
Autores: Dal Bosco, Tatiane Cristina; Universidade Tecnológica Federal do Paraná, Câmpus Londrina; Sampaio, Silvio César; Universidade Estadual do Oeste do Paraná; Coelho, Silvia Renata Machado; Universidade Estadual do Oeste do Paraná; Corrêa, Marcus Metri; Universidade Federal Rural de Pernambuco; Netto, André Maciel; Universidade Federal de Pernambuco; Cosmann, Natássia Jersak; Universidade Estadual do Oeste do Paraná.
This study evaluated the effects of total and dissolved organic matter produced from two swine wastewater treatment systems, a biodigester and a manure lagoon, on the adsorption, desorption, and leaching of alachlor (2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide) in soil. It was used the batch equilibrium method to test adsorption and desorption, and the results are presented in Freundlich isotherms. It also used disturbed soil columns to evaluate the miscible displacement of alachlor in soil treated with total and dissolved organic matter. This assay was used to monitor the concentration of alachlor in the leached material, the amount of total organic carbon, and the pH. The addition of swine wastewater promoted greater adsorption and...
Tipo: Pesquisa empírica de laboratório
Palavras-chave: 5.00.00.00-4; 5.03.00.00-8; 5.03.04.03-8 adsorption; Hydro-dispersive parameters; Infrared spectroscopy; Leaching; Pesticide Reúso de águas residuárias  pesticidas  água residuária de suinocultura  matéria orgânica.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16374

Sorption and desorption of diuron in Oxisol under biochar application
Provedor de dados: 53
Autores: Petter,Fabiano André; Ferreira,Tamara Santos; Sinhorin,Adilson Paulo; Lima,Larissa Borges de; Morais,Leidimar Alves de; Pacheco,Leandro Pereira.
ABSTRACT The objective of this study was to verify the kinetics of sorption and desorption of diuron in an Oxisol under application of biochar. The samples were collected in a field experiment conducted in randomized design blocks consisted of 2 base fertilization levels (0 and 400 kg∙ha−1 NPK 00-20-20 fertilizer formula) and 3 doses of biochar (0, 8 and 16 Mg∙ha−1). In the evaluation of sorption and desorption, Batch Equilibrium method was used. The kinetics of sorption and desorption of diuron, total organic carbon, fulvic acid, humic acid and humin, pH and partition coefficient to organic carbon were evaluated. The Freundlich isotherm was adjusted appropriately to describe diuron sorption kinetics in all the studied treatments. The application of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Persistence; Soil organic matter; Herbicide; Pyrogenic carbon.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400487

Recovery of phytase produced by solid-state fermentation on citrus peel
Provedor de dados: 52
Autores: Rodríguez-Fernández,Daniel Ernesto; Rodríguez-León,José Angel; Carvalho,Júlio Cesar de; Thomaz-Soccol,Vanete; Parada,José Luis; Soccol,Carlos Ricardo.
The extraction of phytase produced by solid-state fermentation of citrus peel was studied employing a multistage leaching process. It was observed that the extracts containing EDTA retained over 90% of phytase activity at room temperature after 24 h after the leaching. A fractional design 2² (with 4 replicates at the central point) was carried out for testing the pH and agitation as process independent factors. Only the interaction between the pH and agitation showed a significant influence. These factors were optimized with a central composite design. Agitation at 300 rpm and pH at 5.0 were the best conditions to extract the enzyme from solid matrix. The modeling of the process indicated that diffusivity of the enzyme in the solvent was the controlling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Recovery multistage; Phytase; Solid state fermentation; Kinetic models.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600026

Alleviating soil acidity through plant organic compounds
Provedor de dados: 52
Autores: Meda,Anderson R.; Cassiolato,Marcelo E.; Pavan,Marcos A.; Miyazawa,Mário.
A laboratory experiment was conducted to evaluate the effects of water soluble plant extracts on soil acidity. The plant materials were: black oat, oil seed radish, white and blue lupin, gray and dwarf mucuna, Crotalaria spectabilis and C. breviflora, millet, pigeon pea, star grass, mato grosso grass, coffee leaves, sugar cane leaves, rice straw, and wheat straw. Plant extracts were added on soil surface in a PVC soil column at a rate of 1.0 ml min-1. Both soil and drainage water were analyzed for pH, Ca, Al, and K. Plant extracts applied on the soil surface increased soil pH, exchangeable Ca ex and Kex and decreased Al ex. Oil seed radish, black oat, and blue lupin were the best and millet the worst materials to alleviate soil acidity. Oil seed radish...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant residue; Organic material; Leaching.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200012

Furrow Irrigation Management and Design Criteria Using Efficiency Parameters and Simulation Models
Provedor de dados: 117
Autores: Holzapfel,Eduardo A.; Leiva,Carlos; Mariño,Miguel A.; Paredes,Jerónimo; Arumí,José L.; Billib,Max.
This study analyzes the relationship between the variables of furrow irrigation and the irrigation performance parameters, crop yield, and deep percolation as a basis for furrow irrigation design and management. Application efficiency (AE), requirement efficiency (RE), requirement distribution efficiency (RDE), total distribution efficiency (TDE), and furrow irrigation management, operation, and design variables (inflow discharge, furrow length, and irrigation cutoff time) were correlated. The relationship between performance irrigation parameters and relative yield was also examined. In addition, environmental aspects related to leaching and runoff were also presented for each of the parameters. Study results indicate that increasing the length of the...
Tipo: Journal article
Palavras-chave: Furrow; Irrigation; Performance parameters; Model; Yield; Leaching.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200012

Nitrogen Losses under Different Cattle Grazing Frequencies and Intensities in a Volcanic Soil of Southern Chile
Provedor de dados: 117
Autores: Núñez,Pedro A.; Demanet,Rolando; Misselbrook,Tom H.; Alfaro,Marta; Mora,María de la Luz.
Chilean livestock production systems have intensified over the last years, with increasing amounts of N fertilizer inputs creating the potentiality for environmental damage through N pollution of water and air, so that alternative production strategies have been developed to reduce such environmental impacts. This study assesses N losses under different grazing frequencies and intensities on permanent pasture (Lolium perenne L., Festuca arundinacea Schreb., Dactylis glomerata L., and Trifolium repens L.) on an Andisol in Southern Chile. Four grazing strategies were evaluated: frequent-heavy (FH), frequent-light (FL), infrequent-heavy (IH), infrequent-light (IL), and a no grazing control (C) treatment, and each with three replicates in a randomized complete...
Tipo: Journal article
Palavras-chave: Ammonium; Grazing; Leaching; Nitrate; NH3 volatilization.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000200007

Farming and soil urban occupation in the water quality of Jaboticabal and Cerradinho streams
Provedor de dados: 64
Autores: Silveira,Géssica Aparecida; Saran,Luciana Maria; Melo,Wanderley José de; Alves,Lucia Maria Carareto.
ABSTRACT Since the end of the twentieth century, 100% of the urban sewage from the city of Jaboticabal has been collected by interceptors and routed to a treatment plant. Between 1999 and 2000, studies on the effect of this environmental care showed that it did not efficiently clean up the water from the two streams that run through the city and flow into an agricultural area. This paper focuses on assessing the influence of soil use on the water quality of surface waters from these two streams. The study was conducted 15 years after the implementation of sewage interceptors. The sampling dates were bimonthly at eight points (P1 to P8) in the Cerradinho and Jaboticabal streams, in Jaboticabal (São Paulo State, Brazil). P1 was located at the source of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; EcoPlate; Metabolic profile; Water resources.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000600633

MACRO simulator (version 5.0) for predicting atrazine herbicide behavior in brazilian latosols
Provedor de dados: 64
Autores: Vasconcelos,Fernanda Carla Wasner; Carvalho,Samara Andrade; Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Guerreiro,Mário César; Curi,Nilton.
The knowledge of pesticides behavior is fundamental for understanding the environmental impact caused by these products. However, related field experiments are time consuming and expensive. The MACRO® simulator allows to predicting the leaching of pesticides through the soil profile and the possible environmental contamination. The objective of this work was to study the percolate behavior and the atrazine leaching in two contrasting Latosols using the MACRO® simulator. The MACRO® simulator was adequate to predict atrazine behavior under the studied conditions and it can be used for the risk evaluation of atrazine contamination in surface and underground waters.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pesticide; Leaching; Environmental impact.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000300003

Chemical changes in an oxisol treated with pyroligneous acid
Provedor de dados: 64
Autores: Togoro,Aluísio Hideki; Silva,Juliana Aparecida dos Santos da; Cazetta,Jairo Osvaldo.
The use of pyroligneous acid (PA), a by-product of charcoal production, is an ancient practice applied in agriculture to control soil and plant pests and diseases. However, little is known about the chemical alterations that this product may cause on treated soil. Thus, the present work aimed to evaluate the effect of PA concentrations on soil ions movement and to verify possible soil chemical properties changes. Detachable columns were filled with Oxisol, submitted to application of 5 PA concentrations (0, 1, 2, 4, 8% v/v), followed by water infiltration in an amount corresponding to 1.5 times the soil total pore volume, and evaluated the soil of four depths (0-10, 10-20, 20-30, 30-40cm) and the leachate. The use of pyroligneous acid in concentrations up...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil fertility; Leaching; Wood vinegar.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200002

Electrical conductivity and mineral composition of the imbibition solution of bean seeds during storage
Provedor de dados: 64
Autores: Silva,Claudia Denise da; Pazeto,Mariana Silva Rosa; Vieira,Roberval Daiton.
The electrical conductivity test has been used to evaluate seed vigour in many species, especially legumes, such as peas, beans and soybeans. The objective of this research was to evaluate the effect of temperature and storage period on the results of the electrical conductivity test and the mineral composition of the imbibition solution of bean seeds (Phaseolus vulgaris L.). Three seed lots of the cultivar IAPAR - 81 and cultivar IPR - TIZIU were stored at 10, 25 and 25-10º C (six months at 10º C and six months at 25º C) The following evaluations were made every three months for a year: seed water content, germination and vigour (accelerated ageing and electrical conductivity) and the potassium, calcium and magnesium contents of the imbibition solution....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris L; Vigour; Leaching; Low temperature.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000200002

Enviromental behavior of sulfentrazone and fipronil in a Brazilian clayey latosol: field experiment and simulation
Provedor de dados: 64
Autores: Scorza Júnior,Rômulo Penna; Franco,André Andrade.
There has been an urgent need to assess pesticide environmental behavior under Brazilian field conditions and to evaluate the risks associated to its use in agriculture. Besides a qualitative and quantitative interpretation of field experiments to acquire understanding about pesticide environmental behaviour, field experiments are important to test pesticide fate models. Environmental behaviour of fipronil and sulfentrazone in a sugarcane area in Dourados, MS, was evaluated until 257 days after application. Moreover, the PEARL model was tested to simulate the fate of these two pesticides in the field. Soil samples for pesticide residue quantification and water content were taken at 0-10, 10-30, 30-50, 50-70 and 70-100 cm depth. There was a fast dissipation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaching; Dissipation; PEARL; Risk assessment.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500001