Nutrition and production of Helianthus annuus in a function of application of leaf silicon
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Data
2019-01-20
Autores
Flores, Rilner Alves
Arruda, Everton Martins
Souza Junior, Jonas Pereira de [UNESP]
Prado, Renato de Mello [UNESP]
Alves dos Santos, Ana Carla
Aragao, Amanda Sasamoto
Pedreira, Nicolas Gomes
Costa, Cinthya Freitas da
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Editor
Taylor & Francis Inc
Resumo
Silicon (Si) is important as it increases plant tolerance to abiotic stresses. However, studies on in foliar fertilization are still scarce. The objective of this research was to evaluate the effect of foliar application of silicon on nutrition and production of Helianthus annuus. The study was carried with a completely randomized design, consisting of five doses of silicon (0; 0.84; 1.68; 2.52 and 3.36 mg L-1) applied as silicate, with four replicates. Biometric evaluations and relative chlorophyll index (RCI) measurements were performed, being also observed the dry matter production and the silicon use efficiency by plants. The RCI is not affected by the foliar application of Si, while the height and leaf area increase by 8.3 and 25.4%, respectively. Foliar Si application up to the dose of 3.36 g L-1 promotes linear increases in the dry matter production of shoots (32%), capitulum (19%) and the whole plant of sunflower (27%).
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Palavras-chave
plant nutrition, sunflower, nutritional efficiency, fertilizers, leaf silicate
Como citar
Journal Of Plant Nutrition. Philadelphia: Taylor & Francis Inc, v. 42, n. 2, p. 137-144, 2019.