Métodos De Aplicação E Doses De Nitrogênio Para a Cultura Do Girassol

Vasconcelos, Denise Vieira; Azevedo, Benito Moreira de; Fernandes, Carlos Newdmar Vieira; Pinto, Olienaide Ribeiro de Oliveira; Viana, Thales Vinícius de Araújo; Mesquita, José Bruno Rego de

doi:10.15809/irriga.2015v20n4p667

Cited by 4 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The research data recommend doses above 80 kg ha -1 of N for the most productive sunflower cultivars under semiarid irrigated conditions (Oliveira et al, 2012;Vasconcelos et al, 2015;Santos et al, 2016).…”

Section: Resultsmentioning

confidence: 94%

Production of Sunflower Oil in Response to Nitrogen Fertilization under Semiarid Conditions under Irrigation

Souza¹,

Tartaglia

Santos

et al. 2021

IJANR

View full text Add to dashboard Cite

Sunflower is one of the most important oilseeds in the world, whose achenes are valued in several industrial chains, mainly for the extraction and processing of its oil. Although there is some information in the literature, the nitrogen (N) requirements for sunflower in semiarid conditions under irrigation are not yet clear. The experimental design used randomized blocks, with treatments in subdivided plots with four replications during two agricultural seasons. The N doses (e.g., 0, 30, 60, 90 and 120 kg ha-1) were assigned to the plots, and to the four sunflower cultivars used (e.g., Aguará 06, Altis 99, Multissol and BRS 122), which were planted in the subplots. The N doses for the maximum achene yields for the Multissol and BRS 122 cultivars were 81.8 and 86.6 kg ha-1, respectively, while N doses of 120 kg ha-1 produced the maximum achene yields for the Altis 99 and Aguará 06 cultivars in the 2016 crop season. In 2017, the Multissol and BRS 122 cultivars were given N doses of 100.7 and 92.8 kg ha-1, respectively, and the Altis 99 and Aguará 06 cultivars were each given an N dose of 120 kg ha-1 of N. The fertirrigated doses of maximum economic efficiency of N were 60 and 70 kg ha-1 for the Multissol and BRS 122 cultivars, respectively. For the oil yields, the maximum N doses of 78.0 and 86.7 kg ha-1 for the BRS 122 and Aguará 06 cultivars and for the Multissol and Altis 99 cultivars at an N dose of 120 kg ha-1 were used for the 2016 harvest. In 2017, the BRS 122 and Multissol cultivars received N doses of 88.6 and 99.1 kg ha-1, respectively, and the Altis 99 and Aguará 06 cultivars received N doses of 120 kg ha-1. The use of fertigation allowed greater efficiency for the N doses in the sunflower cultivars in the semiarid region.

show abstract

Section: Resultsmentioning

confidence: 94%

Production of Sunflower Oil in Response to Nitrogen Fertilization under Semiarid Conditions under Irrigation

Souza¹,

Tartaglia

Santos

et al. 2021

IJANR

View full text Add to dashboard Cite

show abstract

“…Por ter o seu movimento no solo basicamente por difusão, a aplicação do fertilizante fosfatado deve ser feita próxima à semente, para garantir o crescimento adequado das raízes (AQUINO et al, 2012). Tendo seu uso cada vez mais frequente, a técnica da fertirrigação permite a aplicação dos fertilizantes no solo na região de maior concentração das raízes, além de possibilitar ajustes na quantidade de fertilizante a ser aplicado em função do estádio de desenvolvimento da planta, o que possibilita ganhos em eficiência e economia do mesmo (VASCONCELOS et al, 2015).…”

Section: Frequency Of Fertirrigation With Phosphate In Watermelon Culunclassified

Frequência Da Fertirrigação Fosfatada Na Produtividade Da Cultura Da Melancia

Azevedo

Fernandes

Neto

et al. 2018

R_I

Self Cite

View full text Add to dashboard Cite

FREQUÊNCIA DA FERTIRRIGAÇÃO FOSFATADA NA PRODUTIVIDADE DA CULTURA DA MELANCIA BENITO MOREIRA DE AZEVEDO1; CARLOS NEWDMAR VIEIRA FERNANDES2; JOAQUIM RAIMUNDO DO NASCIMENTO NETO3; THALES VINÍCIUS DE ARAÚJO VIANA1; DENISE VIEIRA VASCONCELOS3 E CHRISLENE NOJOSA DIAS FERNANDES3 [1]Departamento de Engenharia Agrícola, CCA/UFC, Av. Mister Hull, s/n, Bloco 804. Caixa Postal 12.168, Fortaleza, CE, Brasil, 60.455 970, benitoazevedo@hotmail.com, thales@ufc.br2Instituto Federal de Educação Ciência e Tecnologia do Ceará (IFCE), Campus Iguatu, Rodovia CE-060, Cajazeiras 63503-790 – Iguatu, CE, Brasil. newdmar@gmail.com3Programa de Pós-Graduação em Engenharia Agrícola, CCA/UFC, Av. Mister Hull, s/n, Bloco 804. Caixa Postal 12.168, Fortaleza-CE, Brasil, 60.455 970, netoparaguai456@yahoo.com.br, denisevasconcelos@hotmail.com, chrislene@gmail.com 1 RESUMO A melancia (Citrullus lanatus) tem grande importância socioeconômica para o Nordeste brasileiro, onde o cultivo sob irrigação vem crescendo e permitindo ao produtor ofertar frutos de melhor qualidade. Objetivou-se avaliar a influência de frequências de fertirrigação fosfatada nos componentes de produção e produtividade da melancia. O delineamento adotado foi o de blocos ao acaso constituído por seis tratamentos, referentes a seis frequências de fertirrigação com fósforo, sendo: 2, 4, 8, 16, 32 e 64 fertirrigações no ciclo e quatro repetições. As variáveis analisadas foram: produtividade comercial; massa média do fruto; diâmetro polar; diâmetro equatorial; espessura da casca e teor de sólidos solúveis. O aumento da frequência de fertirrigação fosfatada proporcionou um melhor desempenho da cultura da melancia. As variáveis produtividade comercial e espessura da casca foram influenciadas significativamente pelas frequências de fertirrigação com fósforo, tendo as mesmas apresentado resposta linear. A frequência de fertirrigação fosfatada de 64 fertirrigações no ciclo de cultivo proporcionou a maior produtividade da melancia. Palavras-chave: Citrullus lanatus; quimigação; ácido fosfórico; adubação fosfatada. AZEVEDO, B. M. de; FERNANDES, C. N. V.; NASCIMENTO NETO, J. R. do; VIANA, T. V. de A.; VASCONCELOS, D. V.; FERNANDES, C. N. D.FREQUENCY OF FERTIRRIGATION WITH PHOSPHATE IN WATERMELON CULTURE PRODUCTIVITY 2 ABSTRACT Watermelon (Citrullus lanatus) is of great socioeconomic importance for the Brazilian Northeast, where crop under irrigation has increased and allowed the producer to offer the best quality fruits. This study aimed to evaluate the influence of frequency of fertirrigation with phosphate components on watermelon production and productivity. The study design was a randomized block consisting of six treatments, referring to six frequencies of fertirrigation with phosphorus, as follows: 2, 4, 8, 16, 32 and 64 in fertigation cycle and four replications. The variables analyzed were: commercial productivity; fruit weight; polar diameter; equatorial diameter; shell thickness and soluble solids. The increased frequency of phosphorus fertirrigation provided a better performance of the watermelon crop. The variables commercial productivity and shell thickness were significantly influenced by the frequencies of fertirrigation with phosphorus, and presented the same linear response. The 64 frequency of phosphorus fertirrigation of the crop cycle provided the greatest productivity of watermelon. Keywords: Citrullus lanatus; chemigation; phosphoric acid; phosphate fertilization.

show abstract

“…Also, gas losses of N, especially denitrification, can lead to increased greenhouse gas emissions (Rodrigues et al 2017). These loss processes reduce the efficiency of nitrogen fertilization, and it is estimated that the crop only absorbs about 1/3 of the nitrogen applied as fertilizer (Pelegrin et al 2009;Vasconcelos et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Productivity and Economics of Inoculated Common Bean as Affected by Nitrogen Application at Different Phenological Phases

Sousa

Oliveira

Damin

et al. 2020

J Soil Sci Plant Nutr

View full text Add to dashboard Cite

Nitrogen fertilizers are widely used on the cultivation of common bean in Brazil, affecting the production cost and the environment. Biological nitrogen fixation (BNF) can reduce the negative impacts related to N supply. This work aimed to evaluate the agroeconomic response of the inoculated common to N-fertilizer topdressing at different phenological phases of the common bean. N-fertilizer in a total of 90 kg ha −1 was applied in the form of urea at 3 phases: planting (P), phenological phase V4 (V4), and phenological phase R5 (R5) of the common bean, in two field experiments. The used treatments were P 0 V4 0 R5 0 , P 0 V4 45 R5 45 , P 0 V4 90 R5 0 , P 0 V4 0 R5 90 , P 30 V4 30 R5 30 , P 30 V4 60 R5 0 , P 30 V4 0 R5 60 , P 60 V4 30 R5 0 , P 60 V4 0 R5 30 , and P 90 V4 0 R5 0. All treatments were inoculated with peat inoculum containing the commercial strain SEMIA 4077 (Rhizobium tropici). The number of nodules (NN), nodule dry mass (NDM), leaf area index (LAI), root dry mass (RDM), shoot dry mass (SDM), grain yield (GY), production cost (PC), gross revenue (GR), net revenue (NR), and benefit-cost ratio (BCR) were determined. N-fertilizer splitting at any dose and phenological phase decreased NN and NDM. N-fertilizer treatments provided higher LAI and SDM compared with the inoculated treatment (P 0 V4 0 R5 0). Inoculated treatment presented higher GY and lower PC, resulting in greater NR and BCR. Inoculation with Rhizobium tropici provided high nodulation to the common bean and increased its GY in 10.2% as compared with N-fertilization, which allowed a 15.8% and 7.8% higher NR and BCR, respectively, than the N-fertilized treatment.

show abstract

Métodos De Aplicação E Doses De Nitrogênio Para a Cultura Do Girassol

Cited by 4 publications

References 7 publications

Production of Sunflower Oil in Response to Nitrogen Fertilization under Semiarid Conditions under Irrigation

Production of Sunflower Oil in Response to Nitrogen Fertilization under Semiarid Conditions under Irrigation

Frequência Da Fertirrigação Fosfatada Na Produtividade Da Cultura Da Melancia

Productivity and Economics of Inoculated Common Bean as Affected by Nitrogen Application at Different Phenological Phases

Contact Info

Product

Resources

About