Data di Pubblicazione:
2009
Citazione:
Effect of biostimulants on quality of baby leaf lettuce grown under plastic tunnel / A. Alberici, M. Valagussa, A. Piaggesi, A. Ferrante. - In: ACTA HORTICULTURAE. - ISSN 0567-7572. - 807(2009), pp. 407-412.
Abstract:
Applications of biostimulants might be used for stimulating the nutrient use
efficiency and improving quality of baby leaf vegetables. The aim of this work was to
evaluate the use of biostimulant for reducing the nitrate content and improving the
commercial quality. The field trials were performed under plastic tunnel in the
North Italy vegetable production area (Bolgare, BG, Italy) during spring (April-
May) and summer (July). The application of biostimulant (Actiwave®, Valagro
S.p.a) was performed by spray using a modified fertigation machine. The
concentrations of Actiwave applied were 0, 3, 4.5 or 6 ml m-2. The effect of
treatments was evaluated by the following determinations: yield, leaf nitrate content,
total chlorophyll, total carotenoids, anthocyanins and total phenols content. In
additional the health status of leaves was determined by chlorophyll a fluorescence
measurements. Results obtained showed that the 4.5 and 6 ml m-2 Actiwave
significantly increased the yield. The leaf nitrate content ranged between 900 and
1100 mg kg-1 FW and was slightly lower in the 3 ml m-2 treatment. The highest
chlorophyll and carotenoids were found in lettuce treated with 6 ml m-2 Actiwave
concentration. The anthocyanins and total phenols were slightly higher at higher
concentration of bistimulant. Actiwave treatments did not affect the main
chlorophyll a fluorescence parameters. This result might be due to an increase of
light use efficiency in treated plants. In conclusion, the biostimulant was able to
increase the yield, but slightly effect on nitrate metabolism was observed. The low
leaf nitrate content in all treatments might be due to the optimal environment
conditions.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Actiwave; Chlorophyll; Environmental friendly; Leafy vegetables; Nitrate; Yield
Elenco autori:
A. Alberici, M. Valagussa, A. Piaggesi, A. Ferrante
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