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| Registros recuperados: 30 | |
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| Megda,Michele Xavier Vieira; Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Otto,Rafael; Vitti,André César. |
| O objetivo deste trabalho foi avaliar a eficiência agronômica das fontes nitrogenadas ureia (U), nitrato de amônio (NA), sulfato de amônio (SA) e cloreto de amônio (CA) em soqueira de cana-de-açúcar colhida sem queima, bem como determinar o efeito residual dessas fontes sobre a produtividade da cultura no ano agrícola subsequente. Utilizou-se o delineamento experimental de blocos ao acaso, com quatro repetições. Os tratamentos consistiram da aplicação de 120 kg ha-1 de N a um Latossolo Vermelho distrófico, coberto por palhada resultante da colheita sem queima da primeira soqueira. Incluiu-se um tratamento de controle sem adição de N fertilizante. Para avaliar o efeito residual dos adubos nitrogenados, aplicaram-se 450 kg ha-1 do formulado 20-5-19 após o... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Cloreto de amônio; Efeito residual; Nitrogênio. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200002 |
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| Vitti,André Cesar; Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze; Ferreira,Danilo Alves; Otto,Rafael; Fortes,Caio; Faroni,Carlos Eduardo. |
| O objetivo deste trabalho foi avaliar a recuperação, pela cana-planta, do nitrogênio (15N) proveniente da ureia e de resíduos culturais da palhada e do sistema radicular da cultura da cana (Saccharum spp.) incorporados ao solo. O experimento foi instalado na safra de 2005/2006, com a cultivar SP81-3250. No plantio, foram instaladas microparcelas de 1,5x2 m, em que aplicaram-se doses equivalentes a 80 kg ha-1 de N (ureia com 5,05% de 15N) e 14 Mg ha-1 de resíduos culturais, dos quais 9 Mg ha-1 de palhada (PA) e 5 Mg ha-1 de sistema radicular (SR), marcados com 15N (1,07 e 0,81% de 15N, respectivamente). Durante o ciclo da cultura, determinou-se o acúmulo total de N da planta. Embora o aproveitamento do N oriundo da mineralização dos resíduos culturais (PA e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Cana-de-açúcar; 15N; Raízes; Ureia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000300009 |
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| Altarugio,Lucas Miguel; Loman,Marcos Harm; Nirschl,Matheus Gomes; Silvano,Rafael Gil; Zavaschi,Eduardo; Carneiro,Leandro de Mello e Silva; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira; Otto,Rafael. |
| Abstract: The objective of this work was to evaluate the effect of magnesium foliar spray on yield performance of soybean (Glycine max) and corn (Zea mays) cultivated in soil with adequate levels of base saturation and magnesium content in Brazil. The field trials were conducted on a Typic Hapludox cultivated with soybean and corn in the 2013/2014 and 2014/2015 crop seasons, respectively. Treatments consisted of Mg rates (50, 100, 250, 500, 1,000 and 1,500 g ha-1 and a control without Mg) applied during the V4, R1, and R5.1 (soybean) or V4 and R2 (corn) phenological growth stages as magnesium sulfate heptahydrate (MgSO4∙7H2O). The SPAD index, leaf Mg content, grain yield, and 100-grain weight were evaluated. The Mg foliar spray increased the SPAD index in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Zea mays; Foliar fertilization; Magnesium sulfate. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201185 |
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| Fortes,Caio; Trivelin,Paulo César Ocheuze; Vitti,André César; Otto,Rafael; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo. |
| The objective of this work was to evaluate the agroindustrial production of sugarcane (millable stalks and sucrose yield) after successive nitrogen fertilizations of plant cane and ratoons in a reduced tillage system. The experiment was carried out at Jaboticabal, SP, Brazil, on a Rhodic Eutrustox soil, during four consecutive crop cycles (March 2005 to July 2009). Plant cane treatments consisted of N-urea levels (control, 40, 80, and 120 kg ha-1 N + 120 kg ha-1 P2O5 and K2O in furrow application). In the first and second ratoons, the plant cane plots were subdivided in N-ammonium nitrate treatments (control, 50, 100, and 150 kg ha-1 N + 150 kg ha-1 K2O as top dressing over rows). In the third ratoon, N fertilization was leveled to 100 kg ha-1 in all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Agroindustrial production; Biomass; Crop residues; Subsoiling; Unburned cane. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000100012 |
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| Otto,Rafael; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo; Vitti,André César; Trivelin,Paulo Cesar Ocheuze. |
| O objetivo deste trabalho foi avaliar o desenvolvimento de raízes e da parte aérea da cana-de-açúcar (Saccharum spp.), no ciclo cana-planta, em resposta à aplicação de nitrogênio (N) no sulco de plantio. Dois experimentos, um em Latossolo Vermelho-Amarelo eutrófico e outro em Latossolo Vermelho distrófico, foram realizados em delineamento de blocos ao acaso, com quatro repetições, com um tratamento sem N (controle) e os tratamentos com 40, 80 e 120 kg ha-1 de N na forma de ureia, aplicados no sulco de plantio. A massa de raízes e da parte aérea foi quantificada em três épocas (outubro de 2005, fevereiro de 2006 e em junho/julho de 2006). A parte aérea foi coletada em 2 m da linha, e as raízes foram coletadas com uma sonda de 0,055 m de diâmetro interno,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Cana-planta; Nitrogênio. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000400010 |
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| Mariano,Eduardo; Trivelin,Paulo Cesar Ocheuze; Leite,José Marcos; Megda,Michele Xavier Vieira; Otto,Rafael; Franco,Henrique Coutinho Junqueira. |
| Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Net N mineralization; Aerobic incubation; Anaerobic incubation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016 |
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| Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze; Faroni,Carlos Eduardo; Vitti,André Cesar; Otto,Rafael. |
| O balanço de 15N de fontes nitrogenadas no sistema solo-planta tem sido de muita valia em estudos das transformações do N em diferentes agroecossistemas. No agrossistema da cana-de-açúcar, nas condições brasileiras, a resposta à adubação nitrogenada de cana-planta ainda é questão não totalmente esclarecida e a utilização de fertilizantes nitrogenados marcados com 15N pode auxiliar no entendimento dessa lacuna. Com o objetivo de avaliar o aproveitamento do N da uréia pela cana-de-açúcar no ciclo agrícola de cana-planta, realizaram-se dois experimentos em área comercial de cana-de-açúcar, com o cultivar SP81-3250. Esses experimentos foram feitos de fevereiro de 2005 a julho de 2006. O delineamento experimental foi o de blocos ao acaso, sendo os tratamentos... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Uréia; 15N; Cana-planta. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000700021 |
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| Vitti,André Cesar; Trivelin,Paulo Cesar Ocheuze; Cantarella,Heitor; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo; Otto,Rafael; Trivelin,Matheus Olivetti; Tovajar,João Gabriel. |
| O experimento foi realizado em canavial comercial, com a variedade SP81 3250, na Usina São Martinho (Pradópolis-SP), em Latossolo Vermelho-Escuro de textura argilosa, com o objetivo de avaliar a mineralização da palha de cana-de-açúcar e sua composição após um ciclo de desenvolvimento da cultura. Foi utilizado um delineamento experimental de blocos completos casualizados, com quatro repetições. Sacos de telas que continham palha marcada em 15N (1,07 % de átomos de 15N), em quantidades equivalentes a 9 t ha-1 de matéria seca, foram colocados entre as fileiras de cana-planta, em todos os tratamentos (0, 40, 80 e 120 kg ha-1 de N). Após 14 meses (de junho 2005 a agosto 2006), foram retirados os sacos para a quantificação do material seco remanescente e para... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Nitrogênio; Técnica isotópica. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000700020 |
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| Otto,Rafael; Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Faroni,Carlos Eduardo; Vitti,André Cesar. |
| Few studies on sugar cane have evaluated the root system of the crop, in spite of its importance. This is mainly due to the difficulty of evaluation and high variability of results. The objective of this study was to develop an evaluation method of the cane root system by means of probes so as to evaluate the mass, distribution and metabolically active roots related to N fertilization at planting. For this purpose, an experiment was conducted in an Arenic Kandiustults with medium texture in Jaboticabal/SP, in a randomized block design with four replications and four treatments: control (without N) and 40, 80 and 120 kg ha-1 of N applied in the form of urea in the planting furrow of the cane variety SP81 3250. One week before harvest, a urea-15N solution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Active roots; Root sampling methods. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000300013 |
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| Vieira,Michele Xavier; Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Otto,Rafael; Faroni,Carlos Eduardo. |
| The great difficulty of incorporation of N fertilizers into the "green sugarcane" system causes concern and since urea is the most commonly used source, there is the risk of loosing NH3 through volatilization. For this reason, a field experiment was undertaken (in a Hapludox Typic) with the objective of evaluating the agronomic efficiency of ammonium chloride on stubble of the second ratoon (SP89 1115), as well as its residual effect on the subsequent cycle (third ratoon). The experimental design was randomized blocks with four replications. Treatments consisted of three N rates (60, 120 and 180 kg ha-1 N) in the form of NH4Cl, in addition to a control treatment without the addition of N fertilizer. The ratoon cane of the second cutting was harvested in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Nitrogen fertilization; Ratoon cane. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400016 |
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| Faroni,Carlos Eduardo; Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Vitti,André Cesar; Otto,Rafael; Cantarella,Heitor. |
| Estudos com isótopos estáveis são cada vez mais comuns pela qualidade e confiabilidade dos resultados obtidos e por não apresentarem risco ao homem e ao ambiente. No entanto, é necessário o uso de microparcelas para diminuir o custo do projeto. Por suas áreas serem muito reduzidas em relação à parcela onde está inserida, o objetivo deste trabalho foi comparar o estado nutricional de plantas das microparcelas com as do restante das parcelas experimentais, na fase de máximo desenvolvimento da cultura da cana-de-açúcar, em experimentos com doses de N. Foram instalados três experimentos, no Estado de São Paulo, com três doses de N e uma testemunha, com quatro repetições, em delineamento em blocos completos casualizados. Nas parcelas, de 48 linhas de 15 m cada,... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Diagnose foliar; Microparcela; Adubação nitrogenada; Macronutrientes. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600041 |
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| Mariano,Eduardo; Trivelin,Paulo Cesar Ocheuze; Vieira,Michele Xavier; Leite,José Marcos; Otto,Rafael; Franco,Henrique Coutinho Junqueira. |
| The quantification of ammonia (NH3) losses from sugarcane straw fertilized with urea can be performed with collectors that recover the NH3 in acid-treated absorbers. Thus, the use of an open NH3 collector with a polytetrafluoroethylene (PTFE)-wrapped absorber is an interesting option since its cost is low, handling easy and microclimatic conditions irrelevant. The aim of this study was to evaluate the efficiency of an open collector for quantifying NH3-N volatilized from urea applied over the sugarcane straw. The experiment was carried out in a sugarcane field located near Piracicaba, São Paulo, Brazil. The NH3-N losses were estimated using a semi-open static collector calibrated with 15N (reference method) and an open collector with an absorber wrapped in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Nitrogen; N fertilization; Volatilization; Collection system. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200010 |
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| Vieira,José Luís Vilela; Nardi,Kaue Tonelli; Silva,Gabriel Rodrigues Anastácio; Moreira,Lílian Angélica; Zavaschi,Eduardo; Moura,Thiago Augusto; Otto,Rafael. |
| ABSTRACT: Determining nutrient uptake and accumulation rates by cotton crops is important to define management strategies, especially for transgenic varieties, which are cultivated using high-technology approaches that require substantial investment to maximize yield. Currently in Brazil, the states of Bahia and Mato Grosso are responsible for 84.4 % of the total cotton growing area. In the present study, two trials were conducted in 2013, one that involved planting FM 940 GLT, FM 980 GLT, and FM 913 GLT varieties in the state of Bahia and the other which involved FM 940 GLT and FM 980 GLT varieties in the state of Mato Grosso. The aim of the two trials was to represent the two regions that currently encompass the largest areas of cotton cultivation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium hirsutum; Nutrient accumulation; Cotton nutrition; Uptake rate. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100506 |
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| Zavaschi,Eduardo; Ferraz-Almeida,Risely; Fária,Letícia Abreu; Otto,Rafael; Vitti,André César; Vitti,Godofredo Cesar. |
| ABSTRACT In tropical soils, the efficiency of phosphorus (P) fertilization is low, due to P adsorption on the surface of the clay. Superphosphate complexed with humic acid (SSP+HA) is presented as an alternative for improving P use efficiency and crop yields. The aim of this study was to investigate SSP+HA performance in sugarcane production including increases in plant dry matter (DM) and P content. The experiment was conducted with two sources of P (simple superphosphate - SSP, SSP+HA) and five doses (0, 45, 90, 135 and 180 kg ha-1 P2O5). The dose of 135 kg ha-1 P2O5 was used to explain the residual effect of P, collecting soil samples from the plant cane and first ratoon. Stalk, top and root samples were collected to determine DM and P content; both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil fertilization; Phosphorus adsorption; Phosphorus dynamics. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100408 |
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| Otto,Rafael; Zavaschi,Eduardo; Souza Netto,Gerson José Marquesi de; Machado,Bianca de Almeida; Mira,Acácio Bezerra de. |
| ABSTRACT Maintenance of crop residues over soil surface under conservational systems limits incorporation of nitrogen fertilizers into the soil. Application of urea over crop residues enhance N-NH3 volatilization losses, justifying the usage of urease inhibitors or N sources less susceptible to volatilization under such conditions. This study aimed to evaluate volatilization losses from N sources applied over sugarcane straw. A field trial was carried out in a sugarcane field in Iracemapolis, Sao Paulo on a Typic Kandiudox in June 2014. We used a complete block experimental design, with seven treatments and four replications. Treatments included Control [CO], ammonium nitrate [AN], NS30TM (ammonium nitrate-75% and ammonium sulfate-25% fused mixture)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urea; NBPT; NS 30 TM; Green cane. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300413 |
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| Carvalho,João Luís Nunes; Otto,Rafael; Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze. |
| Sugarcane (Saccharum spp.) crops provide carbon (C) for soil through straw and root system decomposition. Recently, however, sugarcane producers are considering straw to be removed for electricity or second generation ethanol production. To elucidate the role of straw and root system on the carbon supply into the soil, the biomass inputs from sugarcane straw (tops and dry leaves) and from root system (rhizomes and roots) were quantified, and its contribution to provide C to the soil was estimated. Three trials were carried out in the State of Sao Paulo, Brazil, from 2006 to 2009. All sites were cultivated with the variety SP81 3250 under the green sugarcane harvest. Yearly, post-harvest sugarcane residues (tops, dry leaves, roots and rhizomes) were... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500008 |
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| Otto,Rafael; Mariano,Eduardo; Mulvaney,Richard Lesley; Khan,Saeed Ahmad; Boschiero,Beatriz Nastaro; Tenelli,Sarah; Trivelin,Paulo Cezar Ocheuze. |
| ABSTRACT: N Fertilizer recommendations must be improved to optimize N use efficiency (NUE) for bioenergy crops. A study was conducted to test the hypothesis that sites varying in historical usage of by-product differ in soil N-supplying power and sugarcane (Saccharum spp.) responsiveness to N fertilization. Our aim was to quantify soil N availability and N fertilizer rates, sources, and application timings for their effects on sugarcane yield and NUE. Three N response trials, each involving 0 to 200 kg N ha−1, were conducted in the state of São Paulo, Brazil, at sites varying historically in the usage of vinasse. Before fertilizer application and at harvest, soil inorganic N content was quantified and potential N mineralization estimated by the Illinois... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Illinois Soil N Test; Inorganic N; Vinasse; Mineralization. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100072 |
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| Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze; Carlos Eduardo,Faroni; Vitti,André Cesar; Otto,Rafael. |
| A still unclear question related to sugarcane cropping refers to the low response of the planted cane to nitrogen fertilization. Two experiments were carried out in areas under a Typic Hapludox, located in Pirassununga, São Paulo State, Brazil, and an Arenic Kandiudult, located in Jaboticabal, São Paulo State, Brazil, with the objective to evaluate planted cane response to nitrogen fertilization at planting. The experimental design was organized as random blocks and treatments consisted of three N rates (40, 80, and 120 kg ha-1 N-urea) and a control without N. Nitrogen fertilizers were applied to the bottom of the planting furrow and then incorporated into the soil. During the maximum growth stage, +1 leaf samples were collected from all experimental plots... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Nitrogen; Urea. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500012 |
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| Registros recuperados: 30 | |
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