Disponibilidade hídrica e cinza vegetal no cultivo de gérberas de vaso
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Data
2017-02-24
Autores
Bär, Carina Sthefanie Lemes e Lima
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Universidade Federal de Mato Grosso
Resumo
The use of vegetal ash as an alternative source in fertilization added to
the correct management of irrigation is an important tool in the production of
ornamental plants. The objective of this study was to evaluate the development of
gerbera (Gerbera jamesonii) plants under water availability and doses of vegetal ash.
The experiment was conducted in a greenhouse at the UFMT - Rondonópolis
Campus. The experimental design was a randomized block in a 5 x 5 factorial
scheme, with five soil moisture percentages (40, 60, 80, 100 and 120% of pot
capacity) and five doses of vegetal ash (0, 8, 16, 24 and 32 g dm-3). The chosen
culture was the Gerbera (cv. F1 Red, Festival Light eyes). The experimental units
were composed of pots with a capacity of 2 dm3, filled with Oxisol and the dose of
vegetal ash corresponding to each treatment. Were produced seedlings with
commercial substrate in germination trays, and after a period of 30 days, one
seedling was transplanted per pot. The water bulk corresponding to each water
treatment was calculated from the pot capacity and irrigation was performed by the
gravimetric method, and the differentiation between treatments was started at 30
days after transplanting. At 120 days after sowing were evaluated: Height of floral
stems, number of leaves, total and open chapters, leaf area, diameter of flower stems
and chapters, root bulk, fresh leaf mass, floral stems and chapters, spad index,
available water, consumption and efficiency of water. The results were submitted to
the Polynomial Regression test. Regarding the doses of vegetal ash, for variables
that presented significance the observed response was linear increasing, except for
SPAD index and available water that were quadratic. For water availability the
predominant behavior was quadratic, except for the SPAD index that was linear
decreasing. Thus, water availability showed the best results in the development of
gerbera in a range between 68.23% and 84.58% of pot capacity, and as for vegetal
ash, its introduction as an alternative source of fertilizer gradually increased
production and efficiency of the use of water by gébera plants.
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BÄR, Carina Sthefanie Lemes e Lima. Disponibilidade hídrica e cinza vegetal no cultivo de gérberas de vaso. 2017. 63 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2017.