Cultivo hidropônico de alface e rúcula com diferentes concentrações de ferro visando a biofortificação
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Data
2015-07-30
Autores
Laurett, Luciene
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Editor
Universidade Federal do Espírito Santo
Resumo
Lettuce and arugula are commonly consumed in the form of salad, supplying
the body with vitamins and minerals. Iron is one of these important minerals for
human health and its deficiency causes anemia. Anemia due to iron deficiency is on
a nutritional deficiency of great magnitude, considered a public health problem both
in developing countries as in developed countries. The objective of the research was
to determine biofortification with iron and the effect on the biometric and physiological
characteristics of lettuce and arugula in hydroponic cultures. Two experiments, one
for each culture were installed. The experimental design was a randomized block,
with five treatments and six replications. The treatments consisted of increasing
concentrations of Fe 45 (control), 90; 135; 180; 225 μmol.L-1
. At 27 and 30 days after
transplanting to rocket and lettuce, respectively, the shoot fresh weight, number of
leaves, leaf area, root fresh weight, root volume, shoot dry matter, root dry matter,
nutrient concentration, chlorophyll content and fluorescence were evaluated. The
production of the shoot fresh matter of lettuce and arugula decreased significantly
with increasing iron concentration, decreases were observed in 97,63 and 68,18%,
respectively. The Fe content in tissues was significant only for the arugula root
system, but it was observed a greater increase of the iron concentration in the root
system of both cultures compared to the shoot concentration. For the arugula root
system was observed 68,22 times increase in Fe content compared to the shoot
concentration. The lettuce chlorophyll a content was significant difference in the
highest concentration of iron. The analysis of fluorescence of chlorophyll a held to 14
and 27 DAT in lettuce and arugula, respectively, showed no significant difference
between treatments. The chlorophyll a index, chlorophyll b and total chlorophyll
content in arugula, showed no significant difference. For lettuce production Vitoria de
Santo Antao and Rococo arugula hydroponically recommends the use of the
concentration of 45 μmol.L-1
of Fe.
Descrição
Palavras-chave
Mineral nutrition , Iron deficiency anemia , Nutrição mineral , Greenery , Anemia ferropriva
Citação
LAURETT, Luciene. Cultivo hidropônico de alface e rúcula com diferentes concentrações de ferro visando a biofortificação. 2015. 47 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2015.