Influencia de doses de potássio nos teores de macronutrientes em plantas e sementes de alface

Kano, Cristiaini; Cardoso, Antônio Ismael Inácio; Bôas, Roberto Lyra Villas

doi:10.1590/s0102-05362010000300008

Cited by 36 publications

(22 citation statements)

References 5 publications

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“…The results reported by Kano et al (2010) disagree with those obtained in the present study, in which K fertigation favored the mineral composition of lettuce with respect to the accumulation of Mg, Ca and P. As observed by these authors, the supply of K in the present study favored the mineral composition of lettuce with respect to K accumulation.…”

Section: Resultscontrasting

confidence: 99%

“…These authors also observed that the N dose of 125.8 kg ha -1 resulted in the highest Mg content and that the increment in N doses, for the absence of Mo fertilization, promoted increase in S content. Kano et al (2010), studying lettuce for seed production in protected environment and pots under K 2 O doses (0.0, 1.0, 1.5, 2.0 and 2.5 g plant -1 ), observed significant influence of K doses on the K and Mg contents in the shoots, but did not observe significant effects for the contents of N, P, Ca and S. However, these authors also observed that the increase in K doses resulted in linear increase of K contents and promoted linear reduction in Mg contents.…”

Section: Introductionmentioning

confidence: 99%

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Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon

Souza

Rezende

Freitas

et al. 2015

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate, in greenhouse, the response of the lettuce cultivar 'Vera', with respect to the marketable shoot dry matter production and macronutrient accumulation, as a function of the application of different doses of nitrogen (N) and a potassium silicate-based leaf fertilizer. The lettuce was cultivated from August 10, 2012 (sowing) to October 16, 2012 (harvest). The experimental design was completely randomized with three replicates, referring to nine treatments, resulting from the combination between top-dressing doses of N (9, 54, 90, 126 and 171 kg ha-1) and Si/K2O (1.15, 6.90, 11.50, 16.10 and 21.85 kg ha-1), using the Plan Puebla III experimental matrix, and a control treatment without fertigation. Drip fertigation was used for the application of the doses. The highest doses of N and Si/K2O resulted in the highest marketable shoot dry matter production and highest leaf accumulation of magnesium, calcium, potassium and phosphorus.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon

Souza

Rezende

Freitas

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…Similar results were obtained with seeds of lettuce (Kano et al, 2010) and broccoli (Magro et al, 2009). Cardoso (2011), in a review including several leafy vegetables, reported that N accumulation in seeds was always higher than other nutrients.…”

Section: Resultssupporting

confidence: 84%

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

et al. 2016

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Considering the scarce information on nutrient extraction by plants for seed production within vegetable crops, as well as the effect of fertilization over extraction, studying nutrient accumulation in different plant parts under varied fertilization rates is necessary. This study aimed to evaluate the influence of phosphate rates on macronutrient accumulation in cauliflower plants during seed production. Five phosphate rates were studied (0, 300, 600, 900 and 1200 kg/ha P 2 O 5 ), in a randomized complete block design, with four replications. Accumulation of nutrients in the different plant parts was evaluated at the end of the cycle (vegetative and reproductive, the latter divided in seeds and inflorescence). Data were submitted to analysis of variance and regression. Considering only the seeds, a quadratic effect was obtained for the accumulation of all macronutrients, with maximum estimated for rates between 858 and 952 kg/ha P 2 O 5 . Considering the whole plant (total accumulation), a linear increase for P, Ca and S was obtained the higher the P 2 O 5 rates, while the effect was quadratic for N, K and Mg accumulation. The total nutrient accumulation descending order was: K>N>Ca>S>P>Mg, and considering only the seeds was: N>S>K>P>Ca>Mg, S being highlighted as the second most accumulated nutrient in the seeds.

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“…Kano et al (2010) claim that, during the process of cell differentiation, nitrogen stimulates the production of flower buds. However, excessive C.…”

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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Influencia de doses de potássio nos teores de macronutrientes em plantas e sementes de alface

Cited by 36 publications

References 5 publications

Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon

Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon

Phosphate fertilization over the accumulation of macronutrients in cauliflower seed production

Response of eggplant crop fertigated with doses of nitrogen and potassium

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