Consulta: creatorFacets:"Nascente,Adriano Stephan"
Registros recuperados: 10
Data/hora: 03/06/2024 08:38:22

Interferência das plantas daninhas na cultura do tomate para processamento
Provedor de dados: 75
Autores: 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

Gas exchange rates, plant height, yield components, and productivity of upland rice as affected by plant regulators
Provedor de dados: 86
Autores: 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

Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time
Provedor de dados: 86
Autores: 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

Grain yield and termite damage in rice by compaction on the furrow and seed treatment
Provedor de dados: 86
Autores: 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

Cover crops and herbicide timing management on soybean yield under no-tillage system
Provedor de dados: 86
Autores: 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

Nitrogen fertilization (15NH4NO3) of palisadegrass and residual effect on subsequent no-tillage corn
Provedor de dados: 90
Autores: 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

Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System
Provedor de dados: 90
Autores: 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

Upland rice under no-tillage preceded by crops for soil cover and nitrogen fertilization
Provedor de dados: 90
Autores: Moro,Edemar; Crusciol,Carlos Alexandre Costa; Cantarella,Heitor; Nascente,Adriano Stephan.
The grain yield of upland rice under no-tillage has been unsatisfactory and one reason could be the nitrate/ammonium balance in the soil. Cover crops and nitrogen fertilization can be used to change the nitrate/ammonium relation in the soil and improve conditions for the development of upland rice in the no-tillage (NT) system. The aim was to study the effect of cover crops and nitrogen sources on grain yield of upland rice under no tillage. The study was carried out on the Fazenda Experimental Lageado, in Botucatu, State of São Paulo, Brazil, in an Oxisol area under no-tillage for six years. The experiment was arranged in a randomized block split-plot design with four replications. The plots consisted of six cover crop species (Brachiaria brizantha, B....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Ammonium; Nitrate; Millet; Brachiaria; Crotalaria spectabilis; Nitrogen.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600023

Effects of silicon and drought stress on biochemical characteristics of leaves of upland rice cultivars
Provedor de dados: 124
Autores: 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

Leaf gas exchange and yield of three upland rice cultivars
Provedor de dados: 53
Autores: 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