We report the results of research carried out in Campania in 2000/01 and 2001/02 with the aim of determining the fruit quality of everbearing alpine strawberry (local cv “Regina delle Valli”) grown under plastic (IR-PE) double-tunnels on a 300 m2 surface area and fed by a nutritive solution flux (3.0 l•min-1) including overall 13 macro- (N, P, K, Ca, Mg, S) and microelements (B, Cl, Fe, Mn, Mo, Cu, Zn). Comparisons were made of four electrical conductivity (EC) levels (1.3, 1.6, 1.9 and 2.2 mS•cm-1) of the nutritive solutions, in factorial combination with crops arranged in pairs on two vertical overlapped layers; a split-plot design was arranged and each randomised treatment included 12 plants with three replications. A control crop was grown with the current technique in the same tunnels and the same density as with NFT, i.e. with plants spaced 25 cm along the row and in double-rows 40 cm apart on black PE mulched ridges (80 cm wide). The fruits obtained in spring, in comparison with the autumn ones, showed higher values of dry and optical residues, reducing sugars (glucose and fructose) and sucrose, acids (citric, malic, succinic and ascorbic), calcium, potassium, iron and chloride; in autumn, instead, magnesium, copper, nitrates, phosphates and sulphates were more concentrated in the edible organs. The higher crop layer caused a greater accumulation of all the analysed substances, except for the nitrates which did not vary. With regard to the nutritive solution EC, the 2.2 mS•cm-1 treatment resulted in the highest levels of all the organic constituents; within the mineral compounds, only Fe, Cu, Zn and Cl showed a different trend, as the maximum concentrations corresponded to 1.9 mS•cm-1 EC. The control fruits attained, in autumn, the lowest values for most of the organic components and of the mineral anions, in comparison with those in hydroponics; only the inorganic cations were generally more concentrated with the traditional technique. In spring, the organic constituents and the mineral anions were again found in higher quantities in the fruits obtained by saline solutions, but only with regard to the higher crop level; by contrast, an intermediate accumulation of the latter substances was recorded in the control, referring to the four EC treatments within the lower layer which also often showed lower values of the inorganic cations.

Quality characteristics of Fragaria vesca L. �fruits� influenced by N.F.T. solution EC and shading / Caruso, Gianluca; Villari, A.; Villari, G.. - STAMPA. - 648:(2004), pp. 167-175.

Quality characteristics of Fragaria vesca L. �fruits� influenced by N.F.T. solution EC and shading.

CARUSO, GIANLUCA;
2004

Abstract

We report the results of research carried out in Campania in 2000/01 and 2001/02 with the aim of determining the fruit quality of everbearing alpine strawberry (local cv “Regina delle Valli”) grown under plastic (IR-PE) double-tunnels on a 300 m2 surface area and fed by a nutritive solution flux (3.0 l•min-1) including overall 13 macro- (N, P, K, Ca, Mg, S) and microelements (B, Cl, Fe, Mn, Mo, Cu, Zn). Comparisons were made of four electrical conductivity (EC) levels (1.3, 1.6, 1.9 and 2.2 mS•cm-1) of the nutritive solutions, in factorial combination with crops arranged in pairs on two vertical overlapped layers; a split-plot design was arranged and each randomised treatment included 12 plants with three replications. A control crop was grown with the current technique in the same tunnels and the same density as with NFT, i.e. with plants spaced 25 cm along the row and in double-rows 40 cm apart on black PE mulched ridges (80 cm wide). The fruits obtained in spring, in comparison with the autumn ones, showed higher values of dry and optical residues, reducing sugars (glucose and fructose) and sucrose, acids (citric, malic, succinic and ascorbic), calcium, potassium, iron and chloride; in autumn, instead, magnesium, copper, nitrates, phosphates and sulphates were more concentrated in the edible organs. The higher crop layer caused a greater accumulation of all the analysed substances, except for the nitrates which did not vary. With regard to the nutritive solution EC, the 2.2 mS•cm-1 treatment resulted in the highest levels of all the organic constituents; within the mineral compounds, only Fe, Cu, Zn and Cl showed a different trend, as the maximum concentrations corresponded to 1.9 mS•cm-1 EC. The control fruits attained, in autumn, the lowest values for most of the organic components and of the mineral anions, in comparison with those in hydroponics; only the inorganic cations were generally more concentrated with the traditional technique. In spring, the organic constituents and the mineral anions were again found in higher quantities in the fruits obtained by saline solutions, but only with regard to the higher crop level; by contrast, an intermediate accumulation of the latter substances was recorded in the control, referring to the four EC treatments within the lower layer which also often showed lower values of the inorganic cations.
2004
9789066055773
Quality characteristics of Fragaria vesca L. �fruits� influenced by N.F.T. solution EC and shading / Caruso, Gianluca; Villari, A.; Villari, G.. - STAMPA. - 648:(2004), pp. 167-175.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/117468
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact