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Search Results: 1 - 10 of 39361 matches for " André Petter;Pereira "
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Seletividade de herbicidas inibidores de ALS em diferentes estádios de desenvolvimento do arroz de terras altas
Petter, Fabiano André;Zuffo, Alan Mário;Pacheco, Leandro Pereira;
Pesquisa Agropecuária Tropical , 2011, DOI: 10.5216/pat.v41i3.11584
Abstract: the availability of herbicides registered for upland rice is still limited, increasing the management difficulty level for weeds under this crop system. the objective of this study was to evaluate the effect of the als inhibitors herbicides application, at different periods, on upland rice (cv. cambará). the experimental design was randomized blocks with four replications, in a 5x3 factorial scheme, consisting of the herbicide treatments penoxsulam (36 g ha-1), bispiribaque-sodium (50 g ha-1), pirazossulfurom-ethyl (20 g ha-1), 2,4-d (670 g ha-1), and a control, and three application periods: 15, 30, and 45 days after emergence (dae). plant phytotoxicity, height, and dry biomass were evaluated at 7, 14, and 28 days after application (daa), and also the number of panicles m-2, number of grains panicle-1, and yield. it was observed plant phytotoxicity and height decreasing only when applying bispiribaque-sodium, at 15 and 30 dae. the plant dry biomass was not affected by herbicide application. the number of grains panicle-1 decreased only for pirazossulfurom-ethyl, at 45 dae. yield decreased with the pirazossulfurom-ethyl and penoxsulam application, at 45 dae. generally the best herbicide application period was 30 dae.
Cutaneous metastases of signet-ring cell colorectal adenocarcinoma
Rodrigues, André Petter;Pereira, Gustavo Becker;Schlindwein, Rafael Felix;Cruz, José Vinícius;Furquim, Lucas Cogo;
Journal of Coloproctology (Rio de Janeiro) , 2012, DOI: 10.1590/S2237-93632012000300014
Abstract: colorectal cancer is a common malignancy in our clinical practice and it often evolves to a metastatic stage. cutaneous dissemination, however, is a rare form of presentation of this disease. this study reports the case of a 38-year-old female patient that, even after neoadjuvant chemotherapy, presented cutaneous metastases of signet-ring cell colorectal adenocarcinoma. the malignancy proved to be extremely aggressive, without response to clinical therapy nor allowing surgical management, leading the patient to death about six months after the diagnosis.
Selectivity of Herbicides to Corn and braquiária grass Intercropping in a Crop-Livestock Integration System Seletividade de herbicidas à cultura do milho e ao capim-braquiária cultivadas no sistema de integra o lavoura-pecuária
Fabiano André Petter,Leandro Pereira Pacheco,Sérgio de Oliveira Procópio,Alberto Cargnelutti Filho
Semina : Ciências Agrárias , 2011,
Abstract: The objective of this work was to evaluate the selectivity of different herbicides in the crop of corn and Brachiaria ruziziensis at crop-livestock integration. The experiment was carried out in Nova Xavantina, MT, between January and June of 2008, in soil classified like Rhodic Ferrasol. The trial was installed ar complete randomized block designing , with 11 treatments: lactofen (96 g ha-1); lactofen (192 g ha-1); carfentrazone - ethyl (8 g ha-1); carfentrazone - ethyl (12 g ha-1); flumioxazin (25 g ha-1); flumioxazin (50 g ha-1); lactofen + flumioxazin (96 + 25 g ha-1); lactofen + flumioxazin (192 + 50 g ha-1); nicosulfuron (8 g ha-1); nicosulfuron (40 g ha-1) and a check without herbicide. The treatments were applied at 30 days after the corn emergence. It were evaluated the effects of the treatments in the height, dry biomass and productivity of the corn and, also, in the dry biomass of the B. ruziziensis. The herbicides flumioxazin, lactofen and carfentrazone-ethyl didn′t present potential to be used in post-emergence in this integrated system, due to low selectivity for corn. Nicosulfuron atrate of 8 a g ha-1 provided corn yeld similar to the check with out herbicides, and a initial small suppression of B. ruziziensis; and, consequently, being the best herbicide to be used for weed management in the no-livestock system. O objetivo deste trabalho foi avaliar a seletividade de diferentes herbicidas à cultura do milho e a Brachiaria ruziziensis cultivadas no sistema de integra o lavoura-pecuária. O experimento foi conduzido no Município de Nova Xavantina – MT, no período de janeiro a junho de 2008, em solo classificado como Latossolo Vermelho distrófico. O delineamento experimental utilizado foi o de blocos ao acaso, com quatro repeti es, sendo avaliados 11 tratamentos: lactofen (96 g ha-1); lactofen (192 g ha-1); carfentrazone-ethyl (8 g ha-1); carfentrazone-ethyl (12 g ha-1); flumioxazin (25 g ha-1); flumioxazin (50 g ha-1); lactofen + flumioxazin (96 + 25 g ha-1); lactofen + flumioxazin (192 + 50 g ha-1); nicosulfuron (8 g ha-1); nicosulfuron (40 g ha-1) e testemunha sem herbicida. Os tratamentos foram aplicados aos 30 dias após a emergência da cultura do milho. Avaliaram-se os efeitos dos tratamentos sobre a altura de plantas, fitomassa seca e produtividade de gr os de milho e, também, sobre a fitomassa seca da B. ruziziensis. Os herbicidas flumioxazin, lactofen e carfentrazone-ethyl n o apresentaram potencial para utiliza o em pós-emergência nesse sistema integrado de cultivo, principalmente por apresentar baixa seletividade à cultura do mil
Cutaneous metastases of signet-ring cell colorectal adenocarcinoma
André Petter Rodrigues,Gustavo Becker Pereira,Rafael Felix Schlindwein,José Vinícius Cruz
Journal of Coloproctology (Rio de Janeiro) , 2012,
Abstract: Colorectal cancer is a common malignancy in our clinical practice and it often evolves to a metastatic stage. Cutaneous dissemination, however, is a rare form of presentation of this disease. This study reports the case of a 38-year-old female patient that, even after neoadjuvant chemotherapy, presented cutaneous metastases of signet-ring cell colorectal adenocarcinoma. The malignancy proved to be extremely aggressive, without response to clinical therapy nor allowing surgical management, leading the patient to death about six months after the diagnosis. O cancer colorretal é uma neoplasia comum em nossa prática clínica e frequentemente evolui ao estágio metastático. Dissemina o cutanea, entretanto, é uma forma rara de manifesta o da doen a. Apresentaremos aqui o caso de uma paciente de 38 anos que, mesmo após a realiza o de quimioterapia neoadjuvante, apresentou metástases cutaneas de um adenocarcinoma colorretal com células em anel de sinete. A neoplasia demonstrou-se extremamente agressiva, n o respondendo ao tratamento medicamentoso nem permitindo o tratamento cirúrgico, levando a paciente ao óbito cerca de seis meses após o diagnóstico.
Profundidade de semeadura e crescimento inicial de espécies forrageiras utilizadas para cobertura do solo
Pacheco, Leandro Pereira;Pires, Fábio Ribeiro;Monteiro, Fernando Pereira;Procópio, Sérgio Oliveira;Assis, Renato Lara de;Petter, Fabiano André;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000500019
Abstract: the use of the consortium between cover crops and annual crops in the cerrado, is an increasingly widespread practice, because of the possibility of deployment of cover crops during the development of annual crops by the difference in depth and seeding system. the objective was to evaluate the emergency and some agronomic characteristics of four species of cover crops at different seeding depths, to use them in consortium and oversown in annual crops. the experiment was conducted in a greenhouse, and the experimental design of randomized blocks in factorial arranged 4 x 7, where it was four cover crops: brachiaria brizantha, b. decumbens, b. ruziziensis and panicum maximum cv. tanzania, and six depths of sowing and a cover of seed system (0 cm without any mulch, 0 cm with a mulch of soybean leaves, 1, 4, 8, 10 and 15 cm). the cover crops were cropped in vase for 40 days. we evaluated emergence index, emergence time, plant height, green biomass and dry biomass of the above-ground part, leaf area, root dry biomass and root length density. the largest development of the cover crops was detected in the sowing up to 1 cm of depth. the p. maximum showed no ability to use in consortium with annual crops. the sowing of the cover crops from 10 cm is not recommended.
Desempenho de plantas de cobertura em sobressemeadura na cultura da soja
Pacheco, Leandro Pereira;Pires, Fábio Ribeiro;Monteiro, Fernando Pereira;Procópio, Sérgio de Oliveira;Assis, Renato Lara de;Carmo, Marcos Lima do;Petter, Fabiano André;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008000700005
Abstract: the objective of this work was to evaluate the establishing capacity of cover crops, oversown onto soybean. the soybean was planted at different seasons, so that in the r7 stage (physiologic maturation) different climatic conditions would be present for cover crop implantation and growth. the experiment was carried out in rio verde, go, brazil, in the summer crop season 2005/2006, on a rhodic ferralsol. six cover crops were evaluated: brachiaria brizantha, b. ruziziensis, b. decumbens, eleusine coracana, pennisetum glaucum, and the hybrid cober crop [sorghum bicolor (l.) moench x sorghum sudanense piper stapf]. fallow treatment was used as control. soybean was planted at four sowing seasons: 10/27/2005, 11/10/2005, 11/24/2005 and 12/14/2005. oversowing was carried out manually, by broadcasting at the r7 stage of soybean. except for the second sowing season, in which weed competition reduced the mean stand of cover crops, all the remaining sowing seasons of soybean resulted in satisfactory initial cover crop growth, as given by: emergence, crop height, soil cover, and biomass accumulation. oversowing with b. ruziziensis, b. brizantha, b. decumbens and the hybrid cober crop show higher potential to produce mulch, during the off-season in cerrado.
Temperatura base inferior e estacionalidade de produ??o de genótipos diplóides e tetraplóides de azevém
Müller, Liziany;Manfron, Paulo Augusto;Medeiros, Sandro Luís Petter;Streck, Nereu Augusto;Mittelmman, Andréa;Dourado Neto, Durval;Bandeira, Andriéli Hedlund;Morais, Katiule Pereira;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009005000098
Abstract: the objective of this study was to estimate lower base temperature tb of three diploid (comum, fepagro s?o gabriel, and le 284 and two tetraploid (avance and inia titán) ryegrass genotypes. with the estimated tb, it was also possible to investigate if these genotypes may have seasonal production, which helps in programming herds feeding schedules. five sowing dates (11/05, 07/06, 05/07, 09/08 e 01/09/2007) were performed in santa maria, rs, brazil. two methods were used to estimate tb: least deviation method and relative development method. tb values varied from 7.0 to 8.5°c for diploid genotypes and from 9.0 to 10.6°c for tetraploid genotypes, depending upon the method. diploid ryegrass germoplasm have no risk of seasonal decrease in forage production, whereas tetraploids, mainly avance, may have their growth and development decreased from june to august in santa maria because of minimum air temperature.
Produ??o de fitomassa e acúmulo e libera??o de nutrientes por plantas de cobertura na safrinha
Pacheco, Leandro Pereira;Leandro, Wilson Mozena;Machado, Pedro Luiz Oliveira de Almeida;Assis, Renato Lara de;Cobucci, Tarcísio;Madari, Beáta Emoke;Petter, Fabiano André;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011000100003
Abstract: the objective of this work was to evaluate the performance of cover crops regarding biomass production and nutrient accumulation and release during the off-season in a clayey red latossol (ferralsol) in the cerrado. the assay was carried out at santo ant?nio de goiás and rio verde, go, brazil from november/2007 to october/2008. a randomized block design in a split-plot arrangement in time was used, with the cover crops evaluated in the main plot and with biomass sampling time in the subplot, with four replicates. the evaluated species were: urochloa brizantha, u. ruziziensis, pennisetum glaucum e u. ruziziensis + cajanus cajan and, as reference, a fallow treatment with spontaneous vegetation. sampling times were six in santo ant?nio de goiás and five in rio verde, since the desiccation date of p. glaucum, 60 days after cover crop sowing. p. glaucum showed the largest quantities of dry biomass at the beginning of the off-season, while the other covers showed significant accumulations of biomass and nutrients at the end of the off-season.
Produ??o e ciclagem de nutrientes por plantas de cobertura nas culturas de arroz de terras altas e de soja
Pacheco, Leandro Pereira;Barbosa, Juliano Magalh?es;Leandro, Wilson Mozena;Machado, Pedro Luiz Oliveira de Almeida;Assis, Renato Lara de;Madari, Beáta Emoke;Petter, Fabiano André;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000500033
Abstract: the cover crops in no-till system can contribute to the formation of mulch and nutrient cycling to annual crops in succession. the objective of this study was to evaluate biomass production and nutrient cycling of cover crops sown in the second growing season, in crop rotation after upland rice and soybean, in no-tillage and conventional tillage systems, on a red latassol of rio verde, state of goiás, from april 2008 to april 2010. the experiment was evaluated in randomized strips, in a 5 x 6 factorial design, with four replications. in the horizontal strips two soil management systems (after three years of no-tillage and conventional systems) were evaluated and the cover crops in the vertical strips. biomass and ground cover and nutrient cycling rates were only evaluated in the no-till treatments, in a 5 x 6 factorial arrangement, where the plots were subdivided, corresponding to six harvest dates of dried biomass 0, 15, 30, 60, 90 and 120 days after cutting of the cover crops. the following cover crops were sown in the second growing season: brachiaria ruziziensis, pennisetum glaucum and b. ruziziensis + cajanus cajan and a fallow treatment as reference. biomass production and the rates of soil cover and nutrient accumulation and release by cover crops as well as rice and soybean yield were evaluated. b. ruziziensis and b. ruziziensis + c. cajan performed best in biomass production, ground cover and nutrient accumulation at the end of the cover crops. the nutrients n and k had the highest concentration in the biomass, and the highest nutrient release to the soil was observed for k and p. the highest rice yield was observed when grown in no-tillage on crop residues of p. glaucum and b. ruziziensis, while soybean yields did not differ in the treatments.
Soil fertility and upland rice yield after biochar application in the Cerrado
Petter, Fabiano André;Madari, Beáta Em?ke;Silva, Mellissa Ananias Soler da;Carneiro, Marco Aurélio Carbone;Carvalho, Márcia Thaís de Melo;Marimon Júnior, Ben Hur;Pacheco, Leandro Pereira;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000500010
Abstract: the objective of this work was to evaluate the effect of biochar made from eucalyptus on soil fertility, and on the yield and development of upland rice. the experiment was performed during two years in a randomized block design with four replicates, in a sandy loam dystric plinthosol. four doses of npk 05-25-15, annually distributed in stripes (0, 100, 200 and 300 kg ha-1), and four doses of biochar (0, 8, 16 and 32 mg ha-1), applied once in the first year - alone or with npk - were evaluated. in the first year, biochar positively affected soil fertility [total organic carbon (toc), ca, p, al, h+al, and ph], at 0-10 cm soil depth, and it was the only factor with significant effect on yield. in the second year, the effect of biochar diminished or was overcome by the fertilizer. toc moved down in the soil profile to the 0-20 cm depth, influencing k availability in this layer. in the second year, there was a significant interaction between biochar and the fertilizer on plant growth and biomass dry matter accumulation.
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