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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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| 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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| Batista,Marcelo Augusto; Pintro,José Carlos; Costa,Antonio Carlos Saraiva da; Tormena,Cássio Antonio; Bonato,Carlos Moacir; Batista,Michelli Fernandes. |
| The corn plants were evaluated with different phosphate fertilizer sources and aluminum (Al) concentrations in a sandy substrate. A totally randomized experiment design was set up with two corn plants in the pots containing 2 kg of a sandy substrate, two phosphate sources (Triple Super Phosphate - TSP or Arad Phosphate - AP) and four Al concentrations. When Al concentrations increased, pH (CaCl2) substrate values decreased. There was an increase in the calcium and phosphorus contents in the sandy substrates that received the TSP and AP sources. The calcium, magnesium, phosphorus, and potassium concentrations of the corn plant's shoot were higher in the TSP than without P and AP sources. When the Al concentration increased, the concentration values of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Phosphate fertilizers; Solubility; Toxicity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300004 |
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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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| Registros recuperados: 37 | |
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