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| Registros recuperados: 37 | |
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| Luz Filho,Isaias Venancio da; Scheibel,Viviane; Appoloni,Carlos Roberto. |
| The aim of this study is to determine the amounts of radionuclides' activity present in samples of feed for young and adult chicken and feed for dairy and beef cattle, as well as in dicalcium phosphate (DCP) (CaHPO4), used as a nutritional supplement for animal feed. Radioactivity in these samples is due to the presence of the 238U and 232Th radioactive series, as well as their daughter. In addition, as it is for environmental samples, the activity of 40K should be an important source of radioactivity in all analyzed samples. Gamma rays were measured using a standard spectroscopy system, with a high-resolution HPGe detector. Measured activities in feed samples ranged from 0.23 to 1.51 Bq.kg-1, 0.67 to 4.21 Bq.kg-1, 0.29 to 1.63 Bq.kg-1 and 236 to 402... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gamma Ray Spectrometry; Natural radioactivity; Animal Feed; Dicalcium phosphate (DCP); Phosphate fertilizers. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100506 |
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| Prochnow,Luís Ignácio; Biasioli,Gustavo Marques; Rodella,Arnaldo Antonio; Jesus,Sérgio Luís de; Montes,Célia Regina; Alleoni,Luís Reynaldo Ferracciú. |
| The concentration of orthophosphate ions released from Fe-K-P compounds (Fe3KH8(PO4)6 .6H2O and Fe3KH14(PO4)8 .4H2O) present in superphosphates increases with pH, which initially suggests that the agronomic effectiveness of P fertilizers containing high amounts of these compounds would also increase with soil pH but studies considering activity, instead of concentration, are necessary. With this purpose, both compounds were synthesized under laboratory conditions, characterized by elemental chemical analysis, optical microscopy, X ray diffractometry, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and used in a solubility study. Solutions of 0.01, 0.05 and 0.1 mol L-1 NaCl with pH adjusted to 3.0, 4.0, 5.0, 5.5, 6.0, 6.5, 7.0... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphate fertilizers; Cationic impurities; Phosphorus activity; Phosphorus bioavailability. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832006000300008 |
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| Santos, Danilo Rheinheimer; UFSM; Martinazzo, Rosane; UFRGS; Gatiboni, Luciano Colpo; UDESC; Kaminski, João; UFSM; Silva, Leandro Souza da; UFSM. |
| Em solos com elevado grau de intemperismo, a imobilização temporária de fósforo pela biomassa microbiana do solo (BMS) pode ser um mecanismo de retardamento das reações de adsorção. O objetivo do presente trabalho foi avaliar a amplitude no fósforo microbiano (Pm) em um Argissolo em pastagem nativa submetida à roçada, introdução de forrageiras exóticas e adubadas com fertilizantes fosfatados. O estudo foi desenvolvido a partir de um experimento instalado em 1997 que constava de cinco tratamentos de fosfato e calagem (testemunha sem fósforo; hiperfosfato de gafsa; superfosfato triplo; superfosfato triplo + calcário e superfosfato simples + calcário), distribuídos em quatro blocos ao acaso. Em junho de 2002, a pastagem nativa remanescente foi roçada, semeada... |
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Palavras-chave: 5.01.00.00-9 Agronomia biomassa microbiana; Imobilização; Adubos fosfatados; Pastagens nativas; Disponibilidade de fósforo. microbial biomass; Immobilization; Phosphate fertilizers; Natural pasture; Phosphorus availability. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5319 |
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| SANZONOWICZ, C.; JUNQUEIRA, N. T. V.. |
| ABSTRACT: The sweet passion fruits is a native species of Brazil. It is very well adapted to tropical regions, and can be found growing in wild conditions or cultivated by small farmers in many regions. It is consumed mainly as a fresh fruit, splitting with a knife in two parts and using a spoon to collect the pulp with the seeds. The concentrated juice, easily extracted from the pulp, can be used to make juice, ice-cream and deserts. Many small farmers grow sweet passion fruit as an ornamental plant, particularly because of the beauty flowers and colored fruits. In additon it is considered as a medicinal species to treat stress, anxiety and sleeplessness. The ofter of fresh sweet passion fruit in most fruit and grocery stores is still very limited, and... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Correção do solo; Phosphate fertilizers; Potash fertilizers.; Adubação; Fertilidade do Solo; Fertilizante Potássico; Fertilizante Fosfatado; Maracujá; Passiflora Edulis.; Fertilizer application; Passion fruits; Soil fertility.; Soil amendments. |
| Ano: 2005 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569839 |
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| Duarte,C.F.D.; Paiva,L.M.; Fernandes,H.J.; Prochera,D.L.; Cassaro,L.H.; Breure,M.F.; Flores,L.S.; Fernandes,R.L.; Souza,E.R.C.; Fleitas,A.C.; Falcão,K.R.S.. |
| The development of piatã grass fertilized with phosphorus sources with different solubilities in water was evaluated. The experiment was developed in the unit of Aquidauana of UEMS, MS, from February to August, 2012. Four treatments were evaluated: control (without phosphorus fertilization), slow solubility, fast solubility (readily available), and mixed solubility sources of phosphorus (FH Pasture(r)). It was adopted a randomized blocks design with four blocks and four replicates in a total of 16 pastures (0.5 ha each one). Measurements were performed weekly to evaluate structural characteristics and morphogenic variables of the plants. Data were submitted to a variance analysis according to the model. When necessary, the means of treatments with... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Brachiaria brizantha BRS-Piata; Characterization morphogenic; Phosphate fertilizers; Brachiaria brizantha cv; BRS-Piatã; Caracterização morfogênica; Fertilizantes fosfatados. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000100315 |
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| GOEDERT, W. J.; REIN, T. A.; SOUSA, D. M. G. de. |
| A solubilizacao dos fosfatos naturais brasileiros e uma necessidade, em face da baixa eficiencia agronomica dos mesmos. No brasil, os produtos de transformacao mais comuns sao os superfosfatos e fosfatos de amonio, os quais se constituem em fontes de comprovada eficiencia agronomica. Contudo, ha necessidade de se obter produtos com tecnologia mais simples e que melhor aproveitem as materias-primas disponiveis no Pais. Uma das opcoes exercitadas no momento e a producao de fosfatos parcialmente acidulados com acido sulfurico. A eficiencia agronomica dessas fontes, para culturas anuais, tem sido proporcional a fracao da apatita solubilizada. Trata-se, assim, de um produto viavel, se o preco de mercado for estabelecido em funcao do teor de P2 05 soluvel.... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Eficiencia; Cultura anual; Phosphate fertilizers; Efficiency; Brasil; Centro de Pesquisa Agropecuária dos Cerrados; DF; Fertilização; Fosfatos; Planaltina; Use; Uso; Uso agrícola.; Agricultura; Adubação; Cerrado; Fertilizante Fosfatado; Fósforo; Solo.; Agriculture; Annuals; Fertilizers; Soil.. |
| Ano: 1986 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547644 |
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| Registros recuperados: 37 | |
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