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Consulta: creatorFacets:"Miyazawa,Mário"
Registros recuperados: 15
Data/hora: 09/06/2017 12:36:48
A laboratory method to estimate the efficiency of plant extract to neutralize soil acidity
Provedor de dados: 52
Autores: Cassiolato,Marcelo E.; Miyazawa,Mário; Meda,Anderson R.; Pavan,Marcos A.
Water-soluble plant organic compounds have been proposed to be efficient in alleviating soil acidity. Laboratory methods were
evaluated to estimate the efficiency of plant extracts to neutralize soil acidity. Plant samples were dried at 65ºC for 48 h and
ground to pass 1 mm sieve. Plant extraction procedure was: transfer 3.0 g of plant sample to a becker, add 150 ml of deionized
water, shake for 8 h at 175 rpm and filter. Three laboratory methods were evaluated: sigma (Ca+Mg+K) of the plant extracts;
electrical conductivity of the plant extracts and titration of plant extracts with NaOH solution between pH 3 to 7. These methods
were compared with the effect of the plant extracts on acid soil chemistry. All laboratory methods were related with soil...
Tipo: Journal article
Palavras-chave: Plant residue; Organic acid; Plant alkaline index.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200009
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: Journal article
Palavras-chave: Plant residue; Organic material; Leaching.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200012
Evaluation of oat extracts on the efficiency of lime in soil
Provedor de dados: 52
Autores: Cassiolato,Marcelo E.; Meda,Anderson R.; Pavan,Marcos A.; Miyazawa,Mário; Oliveira,José C. de.
The low mobility of the soluble components of surface-applied lime, limits their ability to reduce subsoil acidity in variable charge
soils. Laboratory experiments were conducted with brazilian Oxisol to evaluate the effect of oat extracts on the mobility of surface
applied calcium in form of CaCO3. The following oat cultivars were evaluated: Argentina 5VL3, UPF 90H400-2, IAPAR 61,
IA96101-b, SI 83400, EMBRAPA 29, LD 9102, FAPA 1, ER 93247, ER 90148, ER 89144, ER 93152, Alpha 94124, Alpha
94206 and Preta comum. Oat extracts and lime were applied at rates of 10 and 5 Mg ha-1, respectively. Effect of lime without
plant extracts on soil acidity was limited in the upper 10 cm of the profile. Lime in the presence of oat extracts increased pH and
Ca ex and...
Tipo: Journal article
Palavras-chave: Subsoil acidity; Ca-leaching; Plant residue.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500014
Dolomite lime’s reaction applied on the surface of a sandy soil of the Northwest Paraná, Brazil
Provedor de dados: 52
Autores: Meda,Anderson R.; Pavan,Marcos A.; Cassiolato,Marcelo E.; Miyazawa,Mário.
Low Ca and Mg are serious limitations to crop production in sandy soils of the northwest Paraná, Brazil. Thus soil samples of an
Oxisol collected in this region were packed into 30cm long columns. Dolomite lime (2.0, 0.84, 0.30, and < 0.30 mm screen)
was added on soil surface, then leached with deionized water. Thereafter, the columns were dismantled and the soil cut into 5cm
segments for chemical analysis. Dolomite lime increased pHCaCl2,, KCl-exchangeable Ca and Mg and residual CO3 mostly in
the top surface layers. Surface dolomite lime had no effect on pH, Ca, Mg, and CO3 in the leachate, independent on the lime
particle size. These results indicated that surface dolomite lime application had no effect on subsoil composition and mostly of the
calcium...
Tipo: Journal article
Palavras-chave: Liming; Ca and Mg leaching; Subsoil acidity.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000200014
Absorção de metais pesados do lodo de esgoto pelo feijoeiro (Phaseolus vulgaris L.)
Provedor de dados: 52
Autores: Miyazawa,Mário; Oliveira,Edson L. de; Parra,Mauro S.; Yamashita,Miyuki.
Toxicity and uptake of heavy metals of sewage sludge by beans (Phaseolus vulgaris L.) were evaluated in green house
experiments. Treatments consisted of 1,0 ; 2,0 and 5,0% (m/m) of dry sewage sludge, collected from Londrina (Bom Retiro and
ETE-Sul) and Curitiba (ETE-Belém and RALF). Bean ( variety IAPAR 57) was sown three times at 0, 120 and 240 days after the
treatments have been applied. Contents of Cd, Cr, Co, Cu, Ni, and Pb in bean tissues cultivated with 5,0% (m/m) of all sewage
sludge were similar to the control and Ba contents were reduced by increasing the quantity of sewage sludge in the soil. The Zn
content in tissue bean incresed from 86 mg kg-1 of control to 462 mg kg-1 by applying 5% (m/m) of sewage sludge in soil, but
plant beans did not show...
Tipo: Journal article
Palavras-chave: Phaseolus vulgaris L.; Heavy metal; Metal toxicity; Metal fractionation.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100012
Reduction of exchangeable calcium and magnesium in soil with increasing pH
Provedor de dados: 52
Autores: Miyazawa,Mário; Pavan,Marcos A.; Ziglio,Cláudio O.; Franchini,Júlio C.
A laboratory study was conducted with soil samples and synthetic solutions to investigate possible mechanisms related with
reduction in KCl exchangeable Ca and Mg with increasing pH. Increasing soil pH over 5.3 with CaCO3 added to the soil and with
NaOH solution added to soil/KCl suspension increased adsorptions of Ca and Mg. The reduction of Mg was greater than Ca and
was related to the concentration of soil exchangeable Al. The decreases of soluble Ca and Mg following addition of Al in
synthetic solution were at pH > 7.5. The isomorphic coprecipitation reaction with Al compounds may be the most possible
mechanism responsible for the decrease of exchangeable Ca and Mg with increasing pH. Possible chemical reactions are
presented.
Tipo: Journal article
Palavras-chave: Coprecipitation; Aluminum; Liming; Acid soils.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200007
Effect of Organic Matter on Manganese Solubility
Provedor de dados: 52
Autores: Andrade,Emilene; Miyazawa,Mário; Pavan,Marcos A.; Oliveira,Edson L. de.
The objective of this study was to re-evaluate some aspects of the relative importance of organic matter on Mn solubility in acid
soil conditions. Field study showed that black oats, oil seed radish, elephant grass, lupin, leucaena, and coffee leaves serving as
mulch decreased Mn solubility as compared with bare soil. The decrease in Mn solubility with plant mulch was related to increase
in soil moisture content. Laboratory study showed that increasing temperature from 25 to 100ºC increased Mn solubility and total
soil organic carbon was little changed; from 150 to 200ºC increased both Mn solubility and organic carbon oxidation, and up to
300ºC decreased Mn solubility and stoped organic carbon oxidation . Aluminum solubility always increased with...
Tipo: Journal article
Palavras-chave: Plant residue; Mulch; Organic carbon; Heavy metal; Micronutrient.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100003
Redistribution of phosphorus in soil through cover crop roots
Provedor de dados: 52
Autores: Franchini,Júlio C.; Pavan,Marcos A.; Miyazawa,Mário.
The objective of this study was to evaluate if cover crops can absorb P from the upper layers and transport it in their roots to
subsoil layers. Samples of an Oxisol were placed in PVC columns. Super phosphate fertilizer was applied to the 0-10 cm soil
surface layers. The cover crops tested were: Avena strigosa, Avena sativa, Secale cereale, Pisum sativum subsp arvense, Pisum
sativum, Vicia villosa, Vicia sativa, Lupinus angustifoliu, Lupinus albus, and Triticum aestivum. After a growth period of 80 days
the cover crop shoots were cut off and the soil was divided into 10cm layers and the roots of each layer were washed out. The
roots and shoots were analyzed separated for total P contribution to the soil. Considerable amount of P was present in the roots...
Tipo: Journal article
Palavras-chave: Phosphorus nutrition; Soil phosphorus; Green manure; No-tillage.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300007
Re-evaluation of manganese solubility as affected by soil sample preparation in the laboratory
Provedor de dados: 52
Autores: Andrade,Emilene; Miyazawa,Mário; Pavan,Marcos Antonio; Oliveira,Edson Lima de.
Laboratory experiments were conducted to re-evaluate the effects of drying and the time between drying and Mn analysis on soil
Mn solubility using maize seedlings as test plant. Samples of five soil types were collected in the field, transferred to laboratory
and submitted for the following treatments: dried in the shade at 25ºC and dried at 65ºC followed by Mn determination
immediately and after 30 and 60 days. Ninety days later soil samples were rewetted at field capacity and maize seedlings were
grown for 7 days. Evaluations included plant Mn content and soil Mn extracted with NH4OAc 1 mol L-1 pH 7. The lowest soil
and plant Mn contents were found in soil samples dried in the shade at 25ºC. Drying soil sample at 65ºC and increasing the time
between...
Tipo: Journal article
Palavras-chave: Micronutrient; Transition metal; Soil analysis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500017
Organic acid effect on calcium uptake by the wheat roots
Provedor de dados: 52
Autores: Nunes,Fabrize Caroline; Miyazawa,Mário; Pavan,Marcos Antonio.
This work evaluated the effect of the natural organic acids on the uptake of Ca by the wheat roots in a hydroponic solution. The
following organic acids were evaluated: citric, oxalic, tartaric, malic, malonic, maleic, DL-malic, p-hydroxybenzoic, aconitic, and
salicilic. The organic acids neither enhanced the root growth nor increased Ca uptake. The salicilic and malic acids were highly
toxic and decreased the root growth. The citric, tartaric, maleic, aconitic, and salicilic decreased the Ca uptake by the roots due to
their higher capacity to form the stable complexes with Ca in solution at pH 6.0. Decreasing the Ca valence from Ca++ to CaL+ or
CaL2(0) through the organic ligand complexation reactions decreased the Ca uptake. The results suggested that...
Tipo: Journal article
Palavras-chave: Nutrient uptake; Metal-organic complex; Organic ligand; Organic molecule.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100002
Plant residues: short term effect on sulphate, borate, zinc and copper adsorption by an acid oxisol
Provedor de dados: 52
Autores: Dias,Ana Cristi Basile; Pavan,Marcos Antonio; Miyazawa,Mário; Zocoler,Décio Carlos.
Laboratory experiments were carried out to examine the effects of plant residues on Cu, Zn, B and S adsorption by an acidic
oxisol. The plant residues were: black oats (Avena strigosa), oil seed radish(Raphanus sativus), velvet beans (Stizolobium
cinereum), and pigeon pea (Cajanus cajan) collected at flowering stage. Plant residues increased Cu and Zn adsorptions and
decreased B and S adsorptions. The results indicated that for short term effect plant residues decreased the availabilities of Cu and
Zn through metal organic complex reactions and increased availabilities of S and B through competition with organic anions by
the adsorption sites on soil.
Tipo: Journal article
Palavras-chave: Green manure; Cover crop; Micronutrient; Soil sorption.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200010
Evaluation of Plant Residues on the Mobility of Surface Applied Lime
Provedor de dados: 52
Autores: Miyazawa,Mário; Pavan,Marcos A.; Franchini,Júlio C.
A baixa mobilidade do calcário aplicado na superfície do solo diminui sua eficiência na redução da acidez subsuperficial. Foram
estudados os efeitos de alguns resíduos orgânicos sobre a mobilidade do calcário calcítico aplicado na superfície do solo em
colunas de PVC (60 cm de altura por 15 cm de diâmetro). Avaliaram-se resíduos de aveia preta, trigo, centeio, mucuna cinza e
leucena na dose equivalente a 40 Mg ha-1. Adicionaram-se os resíduos vegetais e o calcário na superfície do solo e, após um
programa de irrigação equivalente a 1500 mm de chuva por ano, avaliaram-se o pH e os teores de Ca, Mg, K e Al trocáveis no
solo e solúveis na água efluente. O efeito do calcário sem resíduos vegetais limitou-se aos primeiros 10 cm de profundidade. Os
resíduos...
Tipo: Journal article
Palavras-chave: Subsoil acidity; Ca leaching; Green manure.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300001
Calibração de câmara semiaberta estática para quantificação de amônia volatilizada do solo
Provedor de dados: 86
Autores: Araújo,Ednaldo da Silva; Marsola,Tatiana; Miyazawa,Mário; Soares,Luís Henrique de Barros; Urquiaga,Segundo;
Boddey,Robert Michael; Alves,Bruno José Rodrigues.
O objetivo deste trabalho foi calibrar uma câmara prática e de baixo custo, para quantificar a amônia volatilizada do solo. A
calibração da câmara foi realizada pela técnica do balanço do isótopo 15N. A amônia volatilizada foi capturada por uma câmara
semiaberta livre estática (SALE), confeccionada a partir de garrafa de plástico transparente de politereftalato de etileno (PET) de 2
L. O interior da câmara apresentava livre circulação de ar, e possuía uma lâmina de espuma de poliuretano, com 2,5 cm de largura
e 25 cm de comprimento, pendurada verticalmente, com a extremidade inferior inserida em frasco com solução ácida, que
mantinha a espuma saturada. A recuperação do 15N-NH3 no coletor aumentou de forma linear com o aumento da taxa de
volatilização de...
Tipo: Journal article
Palavras-chave: Fator de emissão de amônia; Isótopo 15N; Sistema coletor de NH3; Ureia; Volatilização de amônia.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700018
Effect of swine residue rates on corn, common bean, soybean and wheat yield
Provedor de dados: 90
Autores: Sartor,Laércio Ricardo; Assmann,Alceu Luiz; Assmann,Tangriani Simioni; Bigolin,Paulo Egidio; Miyazawa,Mário;
Carvalho,Paulo Cesar de Faccio.
Swine residue (SR) applied as nutrient source of crops such as corn, bean, soybean and wheat, besides representing an
environmental-friendly way of disposing of organic waste resulting from swine production, may significantly increase grain
yields, replacing mineral fertilizer. The objective was to evaluate the effect of SR rates on corn, common bean, soybean and wheat
yields from 2002 to 2007, in comparison with mineral fertilizer. The experiment was carried out at the Instituto Agronômico do
Paraná - IAPAR, Pato Branco, PR and consisted of increasing SR rates (0, 15, 30, 45, and 60 m³ ha-1) and one treatment with
mineral fertilizer (NPK 4-30-10), using 250 kg ha-1 for bean and 300 kg ha-1 for corn, soybean and wheat. Also, in the treatment
with mineral...
Tipo: Journal article
Palavras-chave: Fertilizer; Micronutrient; Foliar nitrogen; Organic residues; Foliar phosphorous.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200035
Potencial de extratos de resíduos vegetais na mobilização do calcário no solo por método biológico
Provedor de dados: 63
Autores: Franchini,Júlio Cezar; Meda,Anderson Rotter; Cassiolato,Marcelo Elias; Miyazawa,Mário; Pavan,Marcos Antonio.
O calcário aplicado na superfície do solo apresenta baixa eficiência na correção da acidez subsuperficial. A eficiência pode ser
melhorada através de compostos orgânicos hidrossolúveis liberados pelos resíduos vegetais. Foi avaliado um método biológico
para testar a capacidade de extratos vegetais na mobilização do calcário no solo. O método consiste das seguintes etapas: coleta e
preparo do material vegetal; extração dos compostos orgânicos hidrossolúveis; preparo da coluna de solo; aplicação do calcário na
superfície do solo; aplicação do extrato vegetal; irrigação com água destilada; teste biológico com a planta indicadora de trigo cv.
Anahuac e avaliação do crescimento radicular. A calagem sem resíduo vegetal aumentou o pH e o teor de Ca e diminuiu o...
Tipo: Journal article
Palavras-chave: Calagem; Acidez subsuperficial; Teste biológico; Lixiviação.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000200020