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| FERREIRA,G.L.; SARAIVA,D.T.; QUEIROZ,G.P.; SILVA,D.V.; PEREIRA,G.A.M.; FERREIRA,L.R.; OLIVEIRA NETO,S.N.; MATTIELLO,E.M.. |
| The objective of this work was to evaluate the initial growth and the physiological characteristics of eucalypt submitted to different managements of signalgrass. The experiment was conducted in a protected environment, using a randomized blocks design with five repetitions. The treatments were arranged in a (5 x 2) + 1 factorial design, and the first factor corresponded to the types of weed management (no control; chemical control keeping the signalgrass shoot on the soil; chemical control with removal of the signalgrass shoot; mechanical control keeping the signalgrass shoot on the soil, and mechanical control with removal of the signalgrass shoot); the second factor corresponded to the two weeds species (U. brizantha and U. decumbens) and a control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Control methods; Physiological variables; Initial growth; Urochloa (syn. Brachiaria); Eucalypt. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100099 |
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| SOUZA,M.F.; C. NETO,M.D.; MARINHO,M.I.; SARAIVA,D.T.; FARIA,A.T.; SILVA,A.A.; SILVA,D.V.. |
| ABSTRACT The commercial mixture of imazethapyr and imazapic herbicides has been used for the control of red rice and several other species of weeds found in rice crops; this system called Clearfield. However, its use may limit the succession of non-tolerant crops for long residual activity. The research objective with this work was to determine the persistence of imazethapyr, imazapic and their mixture in three soils in the Brazilian state of Tocantins. Three experiments were conducted in a completely randomized design with four replications, each corresponding to the evaluated soil (Haplic Plinthosol (FX), red-yellow Latosol (LVA) and Haplic Gleysol (GX)). The treatments were arranged in a split plot design, with the allocated plots herbicides... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carryover; Imazapic; Imazethapyr; Only(r). |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300589 |
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| FAUSTINO,L.A.; FREITAS,M.A.M.; PASSOS,A.B.R.J.; SARAIVA,D.T.; FARIA,A.T.; SILVA,A.A.; FERREIRA,L.R.. |
| RESUMO O conhecimento dos fatores que influenciam a lixiviação dos herbicidas no solo é fundamental para sua utilização de forma segura, do ponto de vista técnico e ambiental. Neste trabalho, avaliou-se a mobilidade do sulfentrazone em quatro solos provenientes de uma área de reflorestamento da região Sul do Brasil (Planossolo Háplico, Argissolo Vermelho, Cambissolo Húmico e Neossolo Regolítico) e um Latosso Vermelho-Amarelo da Zona da Mata de Minas Gerais. As amostras de solo foram coletadas na profundidade de 0-20 cm e caracterizadas física e quimicamente. Os substratos foram colocados em colunas e, posteriormente, aplicou-se, nos topos delas, 1,0 kg ha-1 do herbicida, seguido de uma chuva simulada de 60 mm. Após a drenagem da água, foram semeadas ao... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degradação; Bioindicador; Matéria orgânica. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400795 |
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| MADALÃO,J.C.; SILVA,A.A.; FARIA,A.T.; SARAIVA,D.T.; PIRES,F.R.; JAKELAITIS,A.. |
| ABSTRACT: The objective of this work was to study the influence of adjuvants on leaching and persistence of sulfentrazone in a Red-Yellow Ultisol. The soil was stored in PVC columns of 10 cm diameter and 50 cm length. The treatments were composed of sulfentrazone mixed with six adjuvants (Adesil®, Break-Thru®, Assist®, Hoefix®, Fera® and Nortox® Vegetable Oil), a treatment with sulfentrazone without any adjuvant and a treatment without the herbicide. In the treatments with sulfentrazone, the herbicide was applied at a rate of 1.0 kg ha-1 at the top of the columns, and 12 hours after application, the columns were subjected to simulated rainfall (60 mm). To confirm leaching of sulfentrazone, soil samples were collected every 5 cm up to 50 cm in each column... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum bicolor; Red-Yellow Ultisol; Phytotoxicity; Environmental contamination. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100285 |
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| FREITAS,M.A.M.; VALADÃO SILVA,D.V.; SOUZA,M.F.; SILVA,A.A.; SARAIVA,D.T.; FREITAS,M.M.; CECON,P.R.; FERREIRA,L.R.. |
| Competition between maize and signalgrass can economically cripple the intercropping by the reduced yield of maize and dry matter content of the forage. In seeking to define plant arrangements which make this system more efficient, this research was held with the objective of assessing the effects of interference of densities of signalgrass (Urochloa Brizantha) on nutrition and on maize grain yield. Two field experiments were conducted in a randomized block design with four replications. Treatments were arranged similarly in both experiments, in a 2 x 4 factorial design, the first factor being the dose of Nicosulfuron herbicide applied (0 and 8 g ha-1) and the second factor being the forage seeding rates (0, 2, 4 and 6 kg of seeds per hectare). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nicosulfuron; Competition in intercropping; Cropping spacing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100049 |
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| SILVA,E.M.G.; FARIA,A.T.; MARULANDA,N.M.E.; PEREIRA,G.A.M.; SARAIVA,D.T.; REIS,M.R.; SILVA,A.A.. |
| ABSTRACT: Before recommending an herbicide, it is necessary to know its interactions with the soil attributes that will influence its sorption and half-life in the soil. This knowledge is an essential condition for minimizing any negative effects that may result from its application. However, due to the great diversity of soil and climate in Brazil, especially for products of recent use in the country, such as the herbicide tembotrione, this knowledge is often not available. This may be the main cause of occurrence of intoxication reports in crops carried out in succession to corn sprayed with this herbicide. In order to reduce possible impacts on successor crops and the contamination of surface and groundwater using the high-performance liquid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbicide; Environmental impact; Persistence in soil. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100271 |
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