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| Registros recuperados: 51 | |
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| PÉREZ, D. V.; ALCÂNTARA, S. de; MELO, L. A. S.. |
| Entre las distintas posibilidades de uso del biosólido generado on el tratamiento de las aguas negras, aquella destinada a la agricultura es una de las más aceptables, pues, este material es sumamente rico en sustancias orgânicas y minerales. Con esta característica el todo podrá ser utilizado para condicionar el suelo y/o como abono. Todavia, él presenta, en su composición, alguns metales tóxicos. El uso de este material como abodo podría ocasionar alteraciones en las formas y concentraciones de estos metales, tanto en la fase sólida cuanto en la fase liquida del suelo, con consecuencias poco conocidas para las condiciones tropicales.. Asi, el objetivo de esta investigación es estudiar el impacto ocasionado por el uso agrícola del biosólido, de origem... |
| Tipo: Separatas |
Palavras-chave: Biosólido; Água negra; Oxisol. |
| Ano: 2008 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/334241 |
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| Jayme-Oliveira,Adilson; Ribeiro Júnior,Walter Quadros; Ramos,Maria Lucrécia Gerosa; Ziviani,Adley Camargo; Jakelaitis,Adriano. |
| Abstract: The objective of this work was to evaluate the growth dynamics of the cover plants amaranth (Amaranthus cruentus), quinoa (Chenopodium quinoa), and millet (Pennisetum glaucum) in a Typic Acrustox, under different water regimes in the Brazilian Cerrado. The cultivation was carried out in the winter, with reduced rainfall, which facilitated the application of varying irrigation depths to the different crops. Water regimes denominated lower, lower middle, upper middle, and upper - corresponding to 217, 386, 563, and 647 mm water depths, respectively - were tested by means of an irrigation bar composed of sprinklers with different flow rates. Plant growth was quantified by weekly collections. Amaranth was the most responsive plant to water. Quinoa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amaranthus cruentus; Chenopodium quinoa; Pennisetum glaucum; Oxisol; Water stress.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800561 |
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| BATISTÃO,A.C.; YAMASHITA,O.M.; SILVA,I.V.; ARAÚJO,C.F.; LAVEZO,A.. |
| ABSTRACT: Contamination by herbicides with a prolonged effect on the soil can cause anatomical changes in sensitive plants. Thus, this study aimed at verifying the anatomical changes of tomato stem and leaves caused by different concentrations of picloram in two classes of soil from the Amazon region. The study was developed at UNEMAT, Alta Floresta - Mato Grosso state, in a CRD, in a 2 x 5 factorial arrangement, with four replications. A clayey Rhodic Hapludox (LVAw) and a sandy clay loam Typic Ustipsamments (RQo) were contaminated with 0, 1, 2, 3, and 4 L ha-1 of Tordon®, leaving the soil exposed to weathering. One-hundred and twenty days after the application of the herbicide, 10 tomato seeds were sown in samples of both soils. Thirty days after sowing,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaf blade; Synthetic auxin; Oxisol; Entisol; Tomato. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100303 |
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| SPERA, S. T.; REATTO, A.; MARTINS, E. de S.; FARIAS, M. F. R.; SILVA, A. V. da. |
| RESUMO: A área da bacia hidrográfica do Ribeirão Taguatinga (Área de Relevante Interesse Ecológico Juscelino Kubitschek - ARIE JK), no Distrito Federal, tem superfície de 77,50 km2. As principais classes de solos que ocorrem nessa área são: Latossolos, Argissolos, Cambissolos, Gleissolos, Plintossolos, Neossolos Fúvicos e Neossolos Quartzarênicos cujas principais características químicas, físicas e morfológicas estão apresentadas neste trabalho com o objetivo de subsidiar projetos de desenvolvimento e assentamentos locais. Em realação à aptidão agrícola, os Latossolos são classificados como 2(b)c, 2c e 3(c) e os Argissolos como 2(b)c. Os Cambissolos como 5(n) e 6. Os Gleissolos são classificados como 3(b)c, 3(c) e 5(n), enquanto os Plintossolos apresentam... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Mapeamento; Plintossolo; Gleissolo; Plinthic soil.; Aptidão Agrícola; Cambissolo; Classificação do Solo; Cerrado; Latossolo; Oxisol; Uso da Terra.; Solo; Inceptisols; Brazil; Land suitability; Land use; Soil surveys.; Soil classification; Soil. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569094 |
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| MOREIRA,F.W.; OLIVEIRA,L.A. de; BECKER,P.. |
| As Lecythidaceae compreendem uma das quatro famílias de árvores mais abundantes na floresta amazônica, mas foram pouco estudadas no que sc refere à simbiose com fungos micorrízicos dos solos. Foram coletadas raízes de 31 espécies de seis gêneros desta família numa floresta de terra firme da Amazônia Central, próxima a Manaus, sob um latossolo amarelo. Em algumas espécies observou-se uma ausência total de fungos nas raízes, enquanto que em outras, apenas algumas hifas de fungos, mas sem vesículas ou arbúsculos, estruturas que serviriam para confirmar a presença de micorrizas vesículo-arbusculares efetivas nas mesmas. As poucas bifas encontradas não seriam suficientes para aumentar a absorção de nutrientes do solo, indicando que nas condições edáficas e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazônia; Oxisol; Latossolo. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671997000100003 |
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| SITTA NETO, E.; DAL MOLIN, S. J.; SITTA, C.; BOLDRIN, P. F.; BENITES, V. de M.. |
| Soils from mid-west Brazil show strong phosphorus (P) fixation, which can reduce the efficiency of P fertilizers. Under this condition, soil competes with the plant for the applied P adsorbing it strongly in its mineral fraction. Nevertheless, in areas where crops are grown and fertilizers are added for many years, soil fertility status has increased over time, making these soils nonresponsive to P. The objective of this study was to evaluate how P availability changes with soil use. Forty soil samples were collected under different types of land use: native forest, pasture, no-tillage, and areas with periodic tillage. P fractionation was performed to determine the amount of P in the organic and inorganic fractions with high, medium, and low lability under... |
| Tipo: Artigo de periódico |
Palavras-chave: Oxisol; Fósforo; Plantio Direto; Uso da Terra; Phosphorus; No-tillage; Land use. |
| Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139009 |
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| CARVALHO, J. L. N.; CERRI, C. E. P.; FEIGL, B. J.; PICCOLO, M. de C.; GODINHO, V. de P.; HERPIN, U.; CERRI, C. C.. |
| Mudanças de uso da terra e práticas de manejo modificam a dinâmica do C e a fertilidade do solo. Este estudo avaliou as implicações dos sistemas de cultivo (NT e CT) nos estoques de C e de nutrientes e identificou inter-relações entre estes estoques e outros atributos da fertilidade do solo em Latossolo após a mudança do uso da terra no cerrado amazônico. Os estoques de C e de nutrientes (P, K, Ca e Mg) ajustados pela massa equivalente do solo sob cerrado (CE), foram maiores principalmente sob NT. Após a adoção do NT, exceto em 2NT, os estoques de C foram maiores em relação às demais áreas avaliadas. Correlações entre estoques de C e de nutrientes revelaram algumas correlações positivas com Ca e Mg nas áreas sob NT, devido ao uso continuo de calcário, à... |
| Tipo: Separatas |
Palavras-chave: Plantio convencional; Estoque de nutrientes; Nutrient stock.; Latossolo; Oxisol; Plantio Direto.; Conventional tillage; No-tillage.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/709880 |
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| Carvalho,João Luís Nunes; Carlos Eduardo Pelegrino,Cerri; Feigl,Brigitte Josefine; Píccolo,Marisa de Cássia; Godinho,Vicente de Paula; Herpin,Uwe; Cerri,Carlos Clemente. |
| Land use change and land management practices can modify soil carbon (C) dynamics and soil fertility. This study evaluated the effect of tillage systems (no-tillage - NT and conventional tillage - CT) on soil C and nutrient stocks in an Oxisol from an Amazonian cerrado following land use change. The study also identified relationships between these stocks and other soil attributes. Carbon, P, K, Ca and Mg stocks, adjusted to the equivalent soil mass in the cerrado (CE), were higher under NT. After adoption of all but one of the NT treatments, C stocks were higher than they were in the other areas we considered. Correlations between C and nutrient stocks showed positive correlations with Ca and Mg under NT due to continuous liming, higher crop residue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxisol; No-tillage; Conventional tillage; Nutrient stock. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200013 |
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| Moraes,Moacir Tuzzin de; Debiasi,Henrique; Franchini,Julio Cezar; Silva,Vanderlei Rodrigues da. |
| The soil penetration resistance is an important indicator of soil compaction and is strongly influenced by soil water content. The objective of this study was to develop mathematical models to normalize soil penetration resistance (SPR), using a reference value of gravimetric soil water content (U). For this purpose, SPR was determined with an impact penetrometer, in an experiment on a Dystroferric Red Latossol (Rhodic Eutrudox), at six levels of soil compaction, induced by mechanical chiseling and additional compaction by the traffic of a harvester (four, eight, 10, and 20 passes); in addition to a control treatment under no-tillage, without chiseling or additional compaction. To broaden the range of U values, SPR was evaluated in different periods.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedotransfer functions; Oxisol; Impact penetrometer; Soil compaction. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600004 |
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| SILVA,GLÁUCIA ALVES E; SIQUEIRA,JOSÉ O.; STÜRMER,SIDNEY L.; MOREIRA,FATIMA M.S.. |
| ABSTRACT Arbuscular mycorrhizal fungi provide several ecosystem services, including increase in plant growth and nutrition. The occurrence, richness, and structure of arbuscular mycorrhizal fungi communities are influenced by human activities, which may affect the functional benefits of these components of the soil biota. In this study, 13 arbuscular mycorrhizal fungi isolates originating from soils with different land uses in the Alto Solimões-Amazon region were evaluated regarding their effect on growth, nutrition, and cowpea yield in controlled conditions using two soils. Comparisons with reference isolates and a mixture of isolates were also performed. Fungal isolates exhibited a wide variability associated with colonization, sporulation, production of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Inceptisol; Oxisol; Root colonization; Vigna unguiculata. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100357 |
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| Corrêa,Rodrigo Studart; Silva,Douglas José da. |
| ABSTRACT Biosolids have been produced by various stabilization processes of sewage sludge, but little attention has been given to the effects of such treatments on their effectiveness to supply nitrogen for plant growth. Here, we investigated these effects by cultivating Lolium perenne (ryegrass) in two Australian soils, a sandy Spodosol and a clayey Oxisol. Biosolids stabilized by either aerobic digestion, composting, CaO-liming, 250 oC heat-drying or solar irradiation of domestic sewage sludge were applied to soils at 10 increasing rates (0.25-8.0 dry Mg ha-1), and chemically fertilized soils were used as reference. Results showed that the stabilization processes affected biosolids-N agronomic rates and effectiveness to yield plant biomass, which was a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sewage sludge; Organic-N; Plant nutrients; Oxisol; Spodosol. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100523 |
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| Levy,Camila de Carvalho Braga; Mellis,Estêvão Vicari; Murrer,Marina Krey; Inglés,Carlos Repiso; Daynes,Cathal N.; Cavalli,Edilson; Chiba,Marcio Koiti. |
| ABSTRACT Although nickel (Ni) is recognized as plant nutrient since the turn of the 21st century, uncertainty remains about its optimum application rates and forms. This paper focuses on Ni application in soils, relating to its effect as a plant micronutrient. Specifically, the effect of Ni on the activity of urease in soybean plants is examined. The effects of applying four Ni rates in two different soil types were tested. A full factorial 2 × 4 blocked design experiment was established under controlled conditions. Ni rates (0, 0.25, 0.5 and1.0 mg of Ni·kg–1 of soil) were applied in two soils with contrasting clay contents. The addition of Ni increased the urease activity in soybean plants but was affected by soil textural differences. The highest urease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urease; Clay; Sand; Oxisol; Glycine max. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300432 |
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| Registros recuperados: 51 | |
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