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Estudos sobre absorcao de nutrientes atraves da analise mineral em determinados estadios fenologicos e orgaos amostrados, colaboram para eficiencia da nutricao das especies, predizendo os nutrientes mais absorvidos e tambem a epoca de maior exigencia nutricional. O objetivo desse trabalho foi avaliar o teor e acumulo de micronutrientes em gerbera nos periodos vegetativo e reprodutivo, conduzidos com o uso de concentracoes e fontes de potassio na solucao nutritiva. O experimento foi conduzido em casa de vegetacao do DRN/Ciencia do Solo, da Faculdade de Ciencias Agronomicas da UNESP, Botucatu (SP). O delineamento experimental adotado foi o de blocos casualizados, em esquema fatorial 2x5 (duas fontes e cinco doses de potassio), quatro repeticoes e cinco plantas por parcela. As fontes utilizadas foram o cloreto e o silicato, aplicados nas doses de 0, 50, 100, 150 e 200 mg L -1 de potassio. A cultivar de gerbera utilizada foi a Red. De forma geral o silicato de potassio promoveu maior teor e acumulo de micronutrientes nas folhas, diferindo somente quanto ao Cl e Si, especificos das fontes, bem como minimizou os efeitos toxicos do Fe, Mn e Zn.  A ordem decrescente para teor de micronutrientes e silicio na parte aerea das plantas de gerbera foi de Fe>Mn>Zn>B>Cu>Si>Cl ao final do experimento. Content and accumulation of micronutrients in pot gerbera according to sources and doses of potassium Abstract: Studies on nutrient absorption by analyzing the mineral analysis at certain growth stages and sampled agencies collaborate to the species nutrition efficiency, predicting the most absorbed nutrients and also the time of greatest nutritional requirement. The aim of this study was to evaluate the content and accumulation of micronutrients in gerbera in vegetative and reproductive periods, conducted using concentrations and sources of potassium in nutrient solution. The experiment was conducted in a greenhouse of the DRN / Soil Science, Faculty of Agricultural Sciences of UNESP, Botucatu (SP). The experimental design was a randomized complete block in a factorial 2x5 (two sources-five potassium doses), four replications and five plants per plot. The sources used were silicate chloride and applied at doses of 0, 50, 100, 150 and 200 mg L -1 potassium. The cultivar gerbera used was Red. Generally potassium silicate promoted higher content and micronutrient accumulation in the leaves, differing only on the Cl and Si, specific sources and downplayed the toxic effects of Fe, Mn and Zn. The descending order for micronutrient content and silicon in shoots of gerbera plants was Fe> Mn> Zn> B> Cu> Si> Cl the end of the experiment.

Teor e acúmulo de micronutrientes em gérbera de vaso em função de fontes e doses de potássio