Produtividade e acúmulo de nitrato nos frutos de abobrinha em função da adubação nitrogenada

Pôrto, Mônica Lima Alves; Puiatti, Mário; Fontes, Paulo Cézar Rezende; Cecon, Paulo Roberto; Alves, Jailson do Carmo; Arruda, Jandeilson Alves de

doi:10.1590/s0006-87052012005000020

Cited by 22 publications

(27 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…abóbora híbrida tipo 'Tetsukabuto' (Pôrto et al, 2011a), de 331 kg ha -1 , para abobrinha cv. Caserta (Pôrto et al, 2012), de 312 e de 344 kg ha -1 , para o melão Cantaloupe, em ambiente protegido e a campo, respectivamente (Coelho, et al, 2003) e de 287,1 a 309,7 kg ha -1 para duas variedades de melão Cantaloupe cultivadas em ambiente protegido (Queiroga et al, 2007).…”

Section: Resultsunclassified

“…Máximas produtividades físicas têm sido encontradas com doses de N de 260 kg ha -1 , para abóbora híbrida, tipo 'Tetsukabuto' (Pôrto et al, 2011a), e de 331 kg ha -1, para abobrinha cv. Caserta, ambas cultivadas a campo (Pôrto et al, 2012). Para melancia, pertencente à espécie Citrullus lanatus, máxima produtividade foi obtida com 144,76 kg ha -1 de N, em área de savana, em Roraima (Barros et al, 2012), e com 104,48 kg ha -1 , em Neossolo Quartzarênico Órtico típico, no Piauí (Andrade Junior et al, 2006).…”

Section: Introductionunclassified

See 1 more Smart Citation

Produtividade e qualidade de frutos de pepino africano em resposta à adubação nitrogenada

et al. 2014

Self Cite

View full text Add to dashboard Cite

Yield and quality of horned cucumber in response to nitrogen fertilizationAfrican horned cucumber (Cucumis metuliferus) is native from Africa and has great potential for international trade of both juice consumption and pharmaceutical uses. However, little is known about the crop management in our conditions, particularly in terms of nitrogen fertilization. This study aimed to evaluate the optimal N level for plant growth and fruit yield as well as fruit quality. The experiment was conducted in a greenhouse using 10 L pots. The experimental arrangement was a completely randomized design with six treatments corresponding to the N rates 0, 40, 80, 120, 160, 200 kg ha -1 , with 11 replications. The variables evaluated included fruit yield, shoot dry matter, root dry matter and physical and chemical characterization of the fruits. The number of fruits and weight of fresh matter of fruits per plant presented maximum values of 2.24 fruits/plant and 516.41 g/plant, respectively, for the rates of 122.50 and 154.44 kg ha -1 N. The average weight of fruit was estimated at 240.27 g/fruit at the maximum N level tested (200 kg ha -1 N). The highest shoot dry matter was 39.12 g/plant at 144.00 kg ha -1 N. The N levels did not influence the quality of the fruits. For the cultivation of African cucumber, we recommend the rate of 154.44 kg ha -1 N that provides 2.18 fruits/ plant with average mass of 237.07 g/fruit and yield estimated at 516.41 g/plant.

show abstract

Section: Resultsunclassified

Section: Introductionunclassified

Produtividade e qualidade de frutos de pepino africano em resposta à adubação nitrogenada

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…One of the major obstacles to the production of Italian Zucchini in protected environment is the lack of consistent information regarding the nutrition and fertilization of the plants (Pôrto et al, 2012). In addition, another difficulty for the production of pumpkins in protected environment refers to pollination.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Andrean¹,

Salim²,

Hachmann³

et al. 2017

Afr. J. Agric. Res.

View full text Add to dashboard Cite

This study aimed to evaluate the effect of different doses of nitrogen and potassium applied through fertirrigation on yield characteristics of Italian Zucchini, Novita Plus cultivar. The experiment was conducted in a greenhouse at the Irrigation Technical Center of the State University of Maringá, Maringá -PR, adopting a completely randomized design in a 4 x 4 factorial scheme, with three replications. Four doses of nitrogen (0, 90, 180 and 270 kg ha . Number of leaves, number of male and female flowers, average yield and mass of fruits per plant were evaluated. There was an increase in leaf production at the maximum nitrogen dose, as well as an increase in the number of male flowers at the maximum dose of nitrogen and potassium. The number of female flowers was influenced only by nitrogen, with an increase in the number of flowers at the highest nitrogen levels. Regarding the fruit yield, the best obtained doses were 179.19 kg ha -1 of N and 171.25 kg ha -1 of K 2 O. Finally, the doses that expressed maximum fruit mass gain were 136.92 kg ha -1 of N and 184.17 kg ha -1 of K 2 O.

show abstract

“…O azoto é um nutriente que influencia os processos envolvidos no crescimento e desenvolvimento das plantas, alterando a relação fonte-dreno e, consequentemente, a distribuição de assimilados entre os órgãos vegetativos e reprodutivos (Porto et al, 2012).…”

Section: Introductionunclassified

Otimização azotada no capim-elefante para fins energéticos

et al. 2016

View full text Add to dashboard Cite

R E S U M OConduziu-se uma experiência não irrigada com um delineamento de blocos casualizados, num esquema de parcelas sub-sub-divididas sob cinco doses de Azoto, quatro de Fósforo e três repetições para cada tratamento, em Alegre (ES), para estimar níveis de adubação das cultivares. Utilizou-se a função de produção para obter o máximo físico e óptimo económico. As cultivares constituíram as parcelas, o fósforo as sub-parcelas e o azoto as sub-sub-parcelas. Observou-se a ausência de significância para o fósforo e para as suas interações. E significância para os outros fatores. Realizou-se uma análise envolvendo os fatores Genótipo e Azoto por meio do modelo estatístico de parcela sub-sub-dividida. A estimativa da produtividade (t ha -1 ) obteve um ajuste estatístico significativo (p < 0,05) ao modelo de segunda ordem. Os resultados indicaram respostas positivas na produtividade física em função da adubação azotada. A receita líquida operacional foi positiva para cvs. Guaçu/IZ.2, Cameroon-Piracicaba e Cana D'África, com os respectivos valores R$ 326,80; R$ 219,54 e R$ 281,49 sem utilização do azoto, devido ao baixo preço da tonelada do capim (R$ 41,82) e elevado preço da tonelada do azoto (R$ 2.670,00). Conclui-se que há possibilidade de manipular a produção de capim-elefante para fins energéticos sem a utilização da adubação azotada.Palavras-chave -Cultivares, energia renovável, função de produção, Pennisetum purpureum Schum, produtividade A B S T R A C TAn experiment was conducted without irrigation in randomized block design, in a split-split plot design under five levels of nitrogenand four levels of phosphorus with three replicates for each treatment, in Alegre (ES), to estimate fertilization levels of cultivars. A function of production was used to obtain the levels of physical maximun and optimal economics. The cultivars were integrated in the plots, phosphorus in the subplots and nitrogen were integrated in the subsubplots. There was no significance for phosphorus and their interactions. The other factors showed significance. Therefore, we performed another analysis involving Genotype and Nitrogen factors through statistical model split split plot in space. The estimated productivity (t ha -1 ) obtained a significant statistical adjustment (p < 0,05) to the second-order model for the surveyed cultivars. The results indicated positive responses to physical productivity depending on nitrogen fertilization.The net operating revenue was positive for Guaçu/IZ.2, Cameroon-Piracicaba and Cana D'África, whose values were 326.80 R$; 219.54 R$ and 281.49 R$, respectively, without nitrogen fertilization, because of the low grass price (41.82 R$ per ton) and the high nitrogen quote (2,670.00 R$ per ton). Thus, it can be concluded that there is a possibility to manage the production of elephant grass for energy purposes without the use of nitrogen fertilization.

show abstract

Produtividade e acúmulo de nitrato nos frutos de abobrinha em função da adubação nitrogenada

Cited by 22 publications

References 15 publications

Produtividade e qualidade de frutos de pepino africano em resposta à adubação nitrogenada

Produtividade e qualidade de frutos de pepino africano em resposta à adubação nitrogenada

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

Otimização azotada no capim-elefante para fins energéticos

Contact Info

Product

Resources

About