Produtividade e acúmulo de nitrato nos frutos da abóbora "Tetsukabuto" em função da adubação nitrogenada

Pôrto, Mônica Lima Alves; Puiatti, Mário; Fontes, Paulo Cesar R.; Cecon, Paulo Roberto; Alves, Jailson C

doi:10.1590/s0102-05362014000300007

Cited by 8 publications

(12 citation statements)

References 16 publications

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“…Nitrogen influences the processes involved in plant growth and development, altering the source-sink relationship and, consequently, the distribution of assimilates between vegetative and reproductive organs (Pôrto et al, 2014). Kano et al (2010) claim that, during the process of cell differentiation, nitrogen stimulates the production of flower buds.…”

Section: Resultsmentioning

confidence: 99%

Response of eggplant crop fertigated with doses of nitrogen and potassium

Souza

Rezende

Lorenzoni

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of the present study was to evaluate the response of eggplant, cv. 'Ciça' , with respect to yield, number of fruits and dry matter (root and stem), when grown in a greenhouse and conducted under fertigation with nitrogen and potassium. Resposta da cultura da berinjela fertirrigada com doses de nitrogênio e potássio R E S U M O Objetivou-se, no presente estudo, avaliar a resposta da cultura da berinjela, cultivar Ciça, com relação à produtividade, número de frutos e massa seca (raiz e caule), quando cultivada em ambiente protegido e conduzida sob fertirrigação com nitrogênio e potássio. O experimento foi conduzido no Centro Técnico de Irrigação da Universidade Estadual de Maringá, entre os meses de fevereiro e agosto de 2015. Foram testadas quatro doses de nitrogênio (0,0; 6,43; 12,86 e 25,72 g de N planta -1 ) e quatro doses de potássio (0,0; 5,18; 10,36 e 20,73 g de K planta -1 ), perfazendo 16 tratamentos em esquema fatorial 4 x 4, dispostos em delineamento inteiramente casualizado com quatro repetições, em Latossolo vermelho distrófico, de textura arenosa. O maior número de frutos por planta e produtividade foi obtido na dose entre 14-17 g de N planta -1 (145-177 kg ha -1 ). Doses isoladas de potássio não influenciaram estatisticamente a produtividade nem a massa seca de raiz.

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Section: Resultsmentioning

confidence: 99%

Response of eggplant crop fertigated with doses of nitrogen and potassium

Souza

Rezende

Lorenzoni

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…Currently, information on the use of N sources and the definition of adequate N dose for the Japanese cucumber cultivated in greenhouses are very scarce in the literature for the Brazilian conditions, being this definition of extreme importance to contribute to a better exploitation of the productive potential of the crop in this cultivation system. Despite the importance of N fertilization for the vegetables yield, this practice is currently a controversial issue, because when applied in excess can result in the reduction of nutritional quality and security due to the NO 3 accumulation (Pôrto et al, 2012b(Pôrto et al, , 2014b. NO 3 when ingested in large amounts by humans can cause serious health consequences, such as formation of nitrosamines, a potentially carcinogenic substance, as well as methemoglobinemia or blue blood that reduces the oxygen transportation in the blood (Santamaria, 2006;Pôrto et al, 2012a;Silva et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…In general, leafy vegetables such as lettuce, spinach, cabbage, arugula, among others, have tendency to accumulate high NO 3 concentration in their leaves (Pôrto et al, 2008;Ohse et al, 2012), existing a great interest in monitoring the NO 3 concentration in these plants. Flower and fruit vegetables, such as cauliflower, tomato, squash, zucchini, usually show less tendency to NO 3 accumulation (Santamaria, 2006;Pôrto et al, 2014b, Silva et al, 2017. Concerning Japanese cucumber crop, information on the NO 3 accumulation in the fruits, as well the influence of N sources and doses on this accumulation, is very scarce in the literature, especially in greenhouse conditions.…”

Section: Introductionmentioning

confidence: 99%

N Sources and Doses on Japonese Cucumber Yield and Nitrate Accumulation in Fruits in Greenhouse

Pôrto¹,

Puiati²,

Fontes³

et al. 2018

JAS

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Despite Japanese cucumber nutritional and commercial importance, few studies have been carried out with the nitrogen (N) fertilization of the crop, especially in greenhouse conditions. This study objective was to evaluate the Japanese cucumber yield and nitrate (NO3-) accumulation in the fruits in greenhouse as a function of the N sources and doses at Viçosa, Minas Gerais State, Brazil. The experiment was set in a randomized complete block design, arranged in a 2 × 5 factorial scheme, with two N sources (ammonium sulphate and ammonium nitrate) and five N doses (0; 75; 150; 300 and 600 kg ha-1), with four replicates. The number of fruits per plant, average fruit mass, fruits yield and NO3- accumulation in the fruits were evaluated. The maximum economic efficiency N doses for two N sources used was calculated according to the prices of the fertilizers and Japanese cucumber fruits practiced in 2010. There were no significant effects of N sources and of the interaction between N sources and N doses for the productive characteristics (number of fruits per plant, average fruit mass and fruits yield) of the Japanese cucumber. However, all the productive characteristics of the Japanese cucumber increased following a quadratic model as a function of the N doses. The maximum economic efficiency N doses for the fruits yield of Japanese cucumber were 398 kg ha-1 and 386 kg ha-1, resulting in fruits yield of 76.38 t ha-1 and 76.29 t ha-1, for the ammonium sulphate and ammonium nitrate, respectively. NO3- accumulation in Japanese cucumber fruits as a function of the N doses for two N sources evaluated was not verified.

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“…This nutrient influences the processes involved in the growth and development of plants by altering the source-sink relation and hence the distribution of assimilates between vegetative and reproductive organs (Pôrto et al, 2014). In cucurbits, the increase in N dose, to a limited extent, provides increment in plant leaf area, having an effect on the production of photoassimilates and consequently the production of fruits (Queiroga et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Nitrogen fertilization is very important to obtain adequate yield, and the proper dosage varies according to the desired productivity, cultivar, management techniques, nutrient source and edaphoclimatic conditions (Pôrto et al, 2012). When applied in excess, nitrogen fertilization can result in reduced quality and nutritional security due to nitrate concentration and, when applied in small amounts, can cause nutritional deficiency with chlorosis and subsequent necrosis of leaves (Pôrto et al, 2014).…”

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.

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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.

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Produtividade e acúmulo de nitrato nos frutos da abóbora "Tetsukabuto" em função da adubação nitrogenada

Abstract: acúmulo de nitrato nos frutos da abóbora "Tetsukabuto" em função da adubação nitrogenada. Horticultura Brasileira 32: 280-285.

Cited by 8 publications

References 16 publications

Response of eggplant crop fertigated with doses of nitrogen and potassium

Response of eggplant crop fertigated with doses of nitrogen and potassium

N Sources and Doses on Japonese Cucumber Yield and Nitrate Accumulation in Fruits in Greenhouse

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

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