Consulta: creatorFacets:"Otto,Rafael"
Registros recuperados: 30
Data/hora: 01/06/2024 06:34:11

Eficiência agronômica de adubos nitrogenados em soqueira de cana-de-açúcar colhida sem queima
Provedor de dados: 86
Autores: 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

Nitrogênio proveniente da adubação nitrogenada e de resíduos culturais na nutrição da cana-planta
Provedor de dados: 86
Autores: 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

Yield performance of soybean and corn subjected to magnesium foliar spray
Provedor de dados: 86
Autores: 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

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage
Provedor de dados: 86
Autores: 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

Fitomassa de raízes e da parte aérea da cana-de-açúcar relacionada à adubação nitrogenada de plantio
Provedor de dados: 86
Autores: 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

Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
Provedor de dados: 90
Autores: 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

Aproveitamento pela cana-de-açúcar da adubação nitrogenada de plantio
Provedor de dados: 90
Autores: 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

Mineralização da palhada e crescimento de raízes de cana-de-açúcar relacionados com a adubação nitrogenada de plantio
Provedor de dados: 90
Autores: 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

Root system distribution of sugar cane as related to nitrogen fertilization, evaluated by two methods: monolith and probes
Provedor de dados: 90
Autores: 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

Utilization of Boron (10B) derived from fertilizer by sugar cane
Provedor de dados: 90
Autores: Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze; Vitti,André César; Otto,Rafael; Faroni,Carlos Eduardo; Tovajar,João Gabriel.
The response to B in agricultural systems of sugar cane is still an unexplored issue; B application has however recently been widely publicized and used with a certain degree of frequency. The use of 10B-labeled fertilizers may further contribute to clarify this practice. With the objective of evaluating sugar cane use of B (10B) derived from fertilizer (boric acid), an experiment was conducted under field conditions in the 2005/2006 growing season. The experiment consisted of the installation of microplots (2 x 1.5 m) where 4 kg ha-1 B (boric acid with 85.95 % in 10B atoms) dissolved in water was applied 90 days after planting (May 2005). The solution was applied to the soil on both sides of the plant row at a distance of 20 cm. After harvest (June 2006)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Planted cane; Stable isotopes; Micronutrients; Saccharum spp.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600015

Ammonium chloride as nitrogen source in sugarcane harvested without burning
Provedor de dados: 90
Autores: 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

Estado nutricional da cultura de cana-de-açúcar (cana-planta) em experimentos com 15N
Provedor de dados: 90
Autores: 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

Manejo da adubação potássica na cultura da cana-de-açúcar
Provedor de dados: 90
Autores: Otto,Rafael; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira.
O Brasil é o maior produtor mundial de cana-de-açúcar e, devido à crescente demanda por fontes renováveis de energia, a área cultivada encontra-se em expansão. Regularmente, a cultura é plantada em solos com baixos teores de nutrientes, o que pode limitar sua produtividade. A adubação potássica da cana-de-açúcar é feita basicamente no sulco de plantio, o que pode comprometer a eficiência de utilização desse nutriente devido a possíveis perdas por lixiviação ou salinidade às raízes das plantas. O objetivo deste estudo foi avaliar produtividade de colmos e atributos tecnológicos da cana-de-açúcar em função de doses e modos de aplicação de K. O experimento foi conduzido em um Latossolo Vermelho distrófico durante o ciclo de cana-planta, com o cultivar SP90...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp; Cana-planta; Cobertura; Cloreto de potássio; Produtividade.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400013

Ammonia losses estimated by an open collector from urea applied to sugarcane straw
Provedor de dados: 90
Autores: 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

Nutrient Uptake by High-Yielding Cotton Crop in Brazil
Provedor de dados: 90
Autores: 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

Application of superphosphate complexed with humic acid in an area of sugarcane
Provedor de dados: 124
Autores: 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

Ammonia volatilization from nitrogen fertilizers applied to sugarcane straw
Provedor de dados: 124
Autores: 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

Input of sugarcane post-harvest residues into the soil
Provedor de dados: 63
Autores: 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
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500008

Effect of previous soil management on sugarcane response to nitrogen fertilization
Provedor de dados: 63
Autores: 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

Stalk yield and technological attributes of planted cane as related to nitrogen fertilization
Provedor de dados: 63
Autores: 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

Conversion of ammonium to nitrate and abundance of ammonium-oxidizing-microorganism in Tropical soils with nitrification inhibitor
Provedor de dados: 63
Autores: Barth,Gabriel; Otto,Rafael; Almeida,Risely Ferraz; Cardoso,Elke Jurandy Bran Nogueira; Cantarella,Heitor; Vitti,Godofredo Cesar.
ABSTRACT The use of nitrification inhibitors (NIs; dicyandiamide - DCD) is an alternative to reduce oxidation of ammonium (NH4+-N) to nitrate (NO3–-N) in the soil, reducing NO3–-N losses from fertilization practices. Based on the hypothesis that DCD reduces conversion of NH4+-N to NO3–-N in tropical soils and inhibits ammonia oxidizing microorganisms (AOM) abundance, soils from the Piracicaba region, São Paulo, with different textures (sand, loam and clay) were incubated with ammonium sulphate (AS) and DCD. Contents of NH4+-N, NO3–-N, soil pH, and AOM abundance were quantified periodically. Ammonium sulphate increased AOM abundance in all soils, but AS+DCD presented AOM abundances similar to the control. During 90 days of incubation, the effectiveness of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DCD; Nitrogen losses; Ammonium sulphate; Fertilizer.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401404

Assessment of sugarcane harvesting residue effects on soil spectral behavior
Provedor de dados: 63
Autores: Demattê,José A. M.; Terra,Fabrício da Silva; Otto,Rafael; Toma,Raul Shiso; Pereira,Luiz Henrique; Nascimento,Alexandre Ferreira do; Bortoletto,Marco Antonio Melo.
ABSTRACT When the harvesting of sugarcane involves a mechanized process, plant residues remain on the soil surface, which makes proximal and remote sensing difficult to monitor. This study aimed to evaluate, under laboratory conditions, differences in the soil spectral behavior of surface layers Quartzipsamment and Hapludox soil classes due to increasing levels of sugarcane’s dry (DL) and green (GL) leaf cover on the soil. Soil cover was quantified by supervised classification of the digital images (photography) taken of the treatments. The spectral reflectance of the samples was obtained using the FieldSpec Pro (350 to 2500 nm). TM-Landsat bands were simulated and the Normalized Difference Vegetation Index (NDVI) and soil line were also determined. Soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TM-Landsat; NDVI; Soil remote sensing; Soil proximal sensing; Soil line.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000200159

Physicochemical characterization of fertilizers containing concentrated suspensions of CuO, MnCO3 and ZnO
Provedor de dados: 63
Autores: Gomes,Marcos Henrique Feresin; Migliavacca,Rafaela Alenbrant; Otto,Rafael; Carvalho,Hudson Wallace Pereira de.
ABSTRACT: The utilization of insoluble sources of micronutrients as concentrated suspensions (CSs) is increasing in Brazilian agriculture; however, much information regarding the physicochemical characterization of these products is required to demonstrate the absorption behavior by plant leaves. This study aimed to characterize the CSs available on the Brazilian market to support their potential use as foliar fertilizers. We selected five CSs containing Mn, five CSs containing Zn and three CSs containing Cu from five different companies. In each product, the mean particle size was evaluated by dynamic light scattering (DLS), the particle shape and size were evaluated by scanning electron microscopy (SEM), the aggregation degree was determined by the zeta...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insoluble; Nanomaterials; Foliar fertilization; Nanofertilizer.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000601601

Residual recovery and yield performance of nitrogen fertilizer applied at sugarcane planting
Provedor de dados: 63
Autores: Franco,Henrique Coutinho Junqueira; Otto,Rafael; Vitti,André Cesar; Faroni,Carlos Eduardo; Oliveira,Emídio Cantídio de Almeida; Fortes,Caio; Ferreira,Danilo Alves; Kölln,Oriel Tiago; Garside,Alan Leslie; Trivelin,Paulo Cesar Ocheuze.
ABSTRACTThe low effectiveness of nitrogen fertilizer (N) is a substantial concern that threatens global sugarcane production. The aim of the research reported in this paper was to assess the residual effect of N-fertilizer applied at sugarcane planting over four crop seasons in relation to sugarcane crop yield. Toward this end three field experiments were established in the state of São Paulo, Brazil, during February of 2005 and July of 2009, in a randomized block design with four treatments: 0, 40, 80 and 120 kg ha−1 of N applied as urea during sugarcane planting. Within each plot, a microplot was established to which 15N-labeled urea was applied. The application of N at planting increased plant cane yield in two of the three sites and sucrose content at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum; Urea; Nitrogen fertilization; Isotopic technique.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600528

Contribution of nitrogen from sugarcane harvest residues and urea for crop nutrition
Provedor de dados: 63
Autores: Fortes,Caio; Vitti,André Cesar; Otto,Rafael; Ferreira,Danilo Alves; Franco,Henrique Coutinho Junqueira; Trivelin,Paulo Cesar Ocheuze.
Sugarcane (Saccharum spp.) harvested without burning provides a substantial amount of remains (trash) on soil profiles which can be decomposed and release nutrients contributing to reduce fertilizer needs. The contribution of nitrogen (N) from sugarcane plant residues and fertilizer in sugarcane nutrition was assessed. Plant cane treatments were micro plots of 15N-labeled urea, sugarcane trash and root system; the last two to simulate the previous crop residues incorporated into the soil after crop renewal. For ratoons, N-ammonium nitrate (N-AN) micro plots, 150 kg ha-1 of N-AN and control (0 kg ha-1) were set up to evaluate the contribution of trash in N supply and quantify the effects of N-fertilizer on N-trash mineralization. The N balances derived from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; 15N isotope; N balance; Urea; Straw; Roots and rhizomes.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500005

Impact of sugarcane trash on fertilizer requirements for São Paulo, Brazil
Provedor de dados: 63
Autores: Trivelin,Paulo Cesar Ocheuze; Franco,Henrique Coutinho Junqueira; Otto,Rafael; Ferreira,Danilo A.; Vitti,André Cesar; Fortes,Caio; Faroni,Carlos E.; Oliveira,Emidio C. A.; Cantarella,Heitor.
The area under mechanized sugarcane (Saccharum spp.) harvesting is expanding in Brazil, increasing the return of trash to the soil. The main questions regarding this management are: (i) after adopting unburned mechanical harvesting, how long will it take to observe decreases in fertilizer requirements, (ii) what will be the magnitude of this decrease and, (iii) the impact in the short run of removing trash for energy purposes in the nutrient cycling? This study aimed to build an N prediction model for long term assessment of the contribution of sugarcane crop residues to sugarcane nutrition and to evaluate the cycling of other nutrients derived from crop residues. Keeping crop residues over the soil will increase soil N stock and N recovery by sugarcane,...
Tipo: Info:eu-repo/semantics/article
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500009

Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
Provedor de dados: 63
Autores: Faria,Italo Kaye Pinho de; Vieira,José Luís Vilela; Tenelli,Sarah; Almeida,Rodrigo Estevam Munhoz de; Campos,Leonardo José Motta; Costa,Rodrigo Veras da; Zavaschi,Eduardo; Almeida,Risely Ferraz de; Carneiro,Leandro de Mello e Silva; Otto,Rafael.
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investigate the yield performances of two hybrid versions (DKB PRO and DKB PRO3) submitted to three plant densities (55,000; 65,000 and 75,000 plants ha−1) and four N rates (control, 60, 120 and 180 kg ha−1 N). Field trials were undertaken at Uberlândia-MG (site1 and 2) and Pedro Afonso-TO (site 3), Brazil from which data on corn yield parameters were collected and analyzed. Multivariate analysis separated the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hybrid; Population; Corn yield; Second-crop.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400344

Soil-app: a tool for soil analysis interpretation
Provedor de dados: 63
Autores: Matias,Filipe Inácio; Sabadin,José Felipe Gonzaga; Moreira,Lílian Angélica; Gomes,Marcos Henrique Feresin; Mira,Acácio Bezerra de; Fritsche-Neto,Roberto; Otto,Rafael.
ABSTRACT New apps have changed the traditional way of learning and teaching; they are also applied as a quickly executed and effective method in agriculture. Soil-app is a web application with a friendly click-point interface built through packages lodged in R software. The app is an advanced model of an open-source platform to support teaching and learning activities in soil analyses and fertilizer recommendations. Soil-app includes soil test interpretation, soil amendment calculations (lime and gypsum), the fertilizer rate for the most important crops in Brazil, an NPK blend calculator, and NPK blend evaluation. It also includes experimental statistical analysis as applied to soil science. Soil-app is a user-friendly and high-performance tool, garnering...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Software; Fertilizers; Recommendation; Prediction; Statistical analyses.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101404

Nitrogen recovery efficiency for corn intercropped with palisade grass
Provedor de dados: 53
Autores: Almeida,Rodrigo Estevam Munhoz de; Favarin,José Laércio; Otto,Rafael; Franco,Henrique; Reis,André Froes Borja; Moreira,Lílian Angélica; Trivelin,Paulo.
ABSTRACT Intercropping corn and palisade grass is a technique to increase straw production, soil C contents, nutrient cycling and crop yield. However, concerns arise from nitrogen (N) uptake by the intercropping crop causing reduction in the yield of the corn. Our objective was to evaluate N recovery efficiency (NRE), and the N dynamics in the soil-plant system in corn intercropped with palisade grass. A field trial was carried out in Bahia, Brazil, evaluating two cropping systems: corn (monoculture) and corn intercropped with palisade grass sowed between rows on the same day as the corn crop, with four replicates in a completely randomized block design. Nitrogen (150 kg∙ha–1of 15N-urea) was applied at sowing to determine NRE, which means the amounts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urochloa ruziziensis; Urea; 15N isotope technique; No-till system; Brazilian Cerrado.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400557

Rendimento da cana-de-açúcar é afetado por flúor
Provedor de dados: 53
Autores: Otto,Rafael; Faria,Maria Regina Meireles de; Queiroz,Fábio Eduardo de Campos; Moura,Thiago Augusto de; Vitti,Godofredo Cesar; Cantarella,Heitor.
O aquecimento de rochas e solos em indústrias de fundição, siderúrgicas, fertilizantes, vidro e cerâmica liberam compostos contendo flúor (F) na atmosfera. Em área cultivada com duas variedades de cana-de-açúcar no município de Cordeirópolis (SP), adjacente à indústria produtora de cerâmica, foram diagnosticadas queda na produtividade e sintomas de toxidez comparados ao canavial distante da fonte emissora de F. Para a variedade SP80 1816, os teores de F variaram de 56 a 3 mg kg-1 em amostras de folhas coletadas pela técnica da diagnose foliar, ao lado e a 13.000 m da cerâmica, respectivamente. Para a variedade RB83 5089 o teor de F nas folhas foi de 26 mg kg-1 a 80 m da cerâmica. Esses teores estão acima dos considerados normais, de 10 mg kg-1 (ou menor)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Indústria de cerâmica; Toxicidade; Produtividade.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052007000300018