Abstract

BARBARO, L.A; DELUCCHI, G  and  KARLANIAN, M.A. Producción de plantines de petunia (Petunia híbrida) en sistema flotante. RIA. Rev. investig. agropecu. [online]. 2015, vol.41, n.2, pp.208-214. ISSN 1669-2314.

The floating system is a type of hydroponic seedling production system widely used in Argentina’s tobacco industry, but this system is new and it has not been very studied and disseminated in the flower industry. This system reduces the hand labor and the water used compared to other cropping systems. On the other hand, the plants of petunia (Petunia hybrida) are very cultivated and require of quality seedlings. Therefore, to evaluate the floating system with this species and to achieve adequate seedlings is a valuable contribution to the sector. The aim of this study was to produce seedlings of petunia in a floating system as an alternative to the conventional system. Two trials were conducted, one compared the floating system vs. the conventional with three doses of fertilizer (19-19-19): 71,5; 31,5; 59,4 mg L^-1 of N-P-K, 143; 62,9; 118,7mg L^-1 of N-P-K and 286; 125,8; 237,4 mg L^-1 of N-P-K; and in the other were compared different types and volumes of seed trays: 228 cells of 10 cm³, 216 cells of 15 cm³, 288 cells of 10 cm³ y 288 cells of 17cm³. When both of these essays were finished, the dry mass of aerial part, root and total dry mass were separately measured. As a result, it was observed that the seedlings obtained in the floating system achieved better development than in the conventional system. The seedlings fertilized with 143; 62,9; 118,7 mg L^-1 ppm of N-P-K achieved greater development. The appropriate size of the seed tray was 228 cells of 10 cm³. In this work was possible to obtain the proper management to produce petunia seedlings in floating system.

Keywords : Hydroponics; Soilless; Floriculture.

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