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| Registros recuperados: 10 | |
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| Nascente,Adriano Stephan; Crusciol,Carlos Alexandre Costa; Cobucci,Tarcísio. |
| The objective of this work was to evaluate the effect of cover crops and their desiccation times on upland rice yield and on the levels of nitrate and ammonium in a no-tillage soil. The experiment was carried out in a randomized blocks, with split plots and three replicates. Cover crops (plots) were sowed in the off-season (March 2009). In November 2009, at 30, 20, 10 and 0 days before rice sowing (split plots), herbicide was applied on the cover crops (fallow, Panicum maximum, Urochloa ruziziensis, U. brizantha and millet). Straw and soil were sampled (0 - 10 cm) at the sowing day, and after 7, 14, 21, 28 and 35 days. Straws from millet and fallow were degraded more rapidly and provided the lowest level of nitrate in the soil. Urochloa ruziziensis, U.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Panicum maximum; Urochloa brizantha; Urochloa ruziziensis; Millet; Nitrogen. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200004 |
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| Nascente,Adriano Stephan; Crusciol,Carlos Alexandre Costa. |
| The objective of this work was to evaluate the effect of cover crops and timing of pre-emergence herbicide applications on soybean yield under no-tillage system. The experiment consisted of four cover crops (Panicum maximum, Urochloa ruziziensis, U. brizantha, and pearl millet) and fallow, in addition to four herbicide timings (30, 20, 10, and 0 days before soybean sowing), under no-tillage system (NTS), and of two control treatments under conventional tillage system (CTS). The experimental design was a completely randomized block, in a split-plot arrangement, with three replicates. Soybean under fallow, P. maximum, U. ruziziensis, U. brizantha, and pearl millet in the NTS and soybean under U. brizantha in the CTS did not differ significantly regarding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Panicum maximum; Brachiaria; Chemical management; Herbicide timing; Pearl millet. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000200006 |
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| Mauad,Munir; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Grassi Filho,Hélio; Lima,Giuseppina Pace Pereira. |
| ABSTRACT Silicon (Si) has beneficial effects on many crops, mainly under biotic and abiotic stress. Silicon can affect biochemical, physiological, and photosynthetic processes and, consequently, reduce drought stress. However, the effects of Si on rice (Oryza sativa L.) plants under drought stress are not well known. The objective of this study was to evaluate the effects of supplemental Si on proline content and peroxidase activity in upland rice plants in the presence and absence of drought stress. The experiment was conducted under greenhouse conditions and was arranged in completely randomized blocks in a 2 x 2 x 2 factorial scheme. Treatments comprised combinations of (1) presence or absence of Si supply (0 or 350 kg ha-1 of Si), (2) presence or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Proline; Peroxidase; Enzyme; Hydric deficiency. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300532 |
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| Alvarez,Rita de Cássia Félix; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Rodrigues,João Domingos; Habermann,Gustavo. |
| The objective of this work was to evaluate gas exchange rates, plant height, yield components, and productivity of upland rice, as affected by type and application time of plant growth regulators. A randomized block design, in a 4x2 factorial arrangement, with four replicates was used. Treatments consisted of three growth regulators (mepiquat chloride, trinexapac-ethyl, and paclobutrazol), besides a control treatment applied at two different phenological stages: early tillering or panicle primordial differentiation. The experiment was performed under sprinkler-irrigated field conditions. Net CO2 assimilation, stomatal conductance, plant transpiration, and water-use efficiency were measured four times in Primavera upland rice cultivar, between booting and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Net photosynthesis; Stomatal conductance; Transpiration; Water-use efficiency. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001000007 |
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| Pinheiro,Veneraldo; Stone,Luís Fernando; Barrigossi,José Alexandre Freitas; Nascente,Adriano Stephan. |
| Abstract The objective of this work was to determine the effects of soil compaction pressure on the sowing furrow and of seed treatments with insecticides on grain yield and on termite damage in upland rice plants under no-tillage, in the Center West region of Brazil. Three experiments were carried out, consisting of five seed treatments combined with three (first experiment) or four (second and third experiments) compaction pressures in a randomized complete block design, in a factorial arrangement. The seed treatments were: T0, without treatment; T1, imidacloprid+thiodicarb; T2, thiamethoxam; T3, carbofuran; and T4, fipronil+pyraclostrobin+thiophanate-methyl. The compaction pressures applied were: 25, 42, and 268 kPa, in the first experiment; and these... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Compaction pressure; Insecticides; No-tillage. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016001101813 |
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| Nascente,Adriano Stephan; Pereira,Welington; Medeiros,Maria Alice. |
| Para se alcançar eficiência no manejo cultural, é muito importante determinar o período crítico de interferência (PCI) das plantas daninhas no cultivo das hortaliças. Avaliou-se neste trabalho a interferência das plantas daninhas na cultura do tomate para processamento, pelo transplantio de mudas, na Embrapa Hortaliças, em delineamento de blocos ao acaso com 3 repetições. Os tratamentos foram divididos em dois grupos, com períodos iniciais crescentes, denominados sem a interferência (no limpo) e com interferência (no mato) das plantas daninhas. No primeiro, a cultura de tomate permaneceu livre da interferência das plantas daninhas desde o transplantio das mudas até os seguintes períodos (dias) do ciclo de desenvolvimento do tomate: 1-28, 1-35, 1-49, 1-63,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Competição; Transplantio; Período crítico de interferência. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362004000300020 |
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| Alvarez,Rita de Cássia Félix; Habermann,Gustavo; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Rodrigues,João Domingos. |
| Studies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. ‘Caiapó’), intermediate (cv. ‘Primavera’) and modern (cv. ‘Maravilha’) upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m2 and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in ‘Primavera’, which may be explained by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Net photosynthesis; Harvest index; Dry matter accumulation rates; Crop growth rate. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000100001 |
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| Borghi,Emerson; Crusciol,Carlos Alexandre Costa; Trivelin,Paulo Cesar Ocheuze; Nascente,Adriano Stephan; Costa,Ciniro; Mateus,Gustavo Pavan. |
| Nitrogen is required in large amounts by plants and their dinamics in corn and perennial forages intercropped is little known. This study analyzed the efficiency of nitrogen fertilization (15NH4NO3) applied after corn grain harvest to palisadegrass (Brachiaria brizantha cv. Marandu) in intercrops sown at two times, as well as the N residual effect on the subsequent corn crop. The field experiment was performed in Botucatu, São Paulo State, in southeastern Brazil, on a structured Alfisol under no-tillage. The experiment was arranged in a randomized block design in a split plot scheme with four replications. The main plots consisted of two intercropping systems (corn and palisadegrass sown together and palisadegrass sown later, at corn top-dressing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Brachiaria brizantha; Crop system; Sustainability. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500011 |
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| Nascente,Adriano Stephan; Li,Yuncong; Crusciol,Carlos Alexandre Costa. |
| Soil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Brachiaria ruziziensis; No-tillage system; Panicum maximum; Pennisetum glaucum; Soil management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300871 |
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| Registros recuperados: 10 | |
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