Abstract

GONZALEZ-FUENTES, José Antonio et al. Effect of mineral amendments on raspberry fruits mineral content and antioxidants. Biotecnia [online]. 2020, vol.22, n.1, pp.48-55.  Epub Aug 03, 2020. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v22i1.1124.

In order for raspberry plants cultivated in an inert growing medium of peat moss and perlite acquire a greater amount of mineral nutrients than they commonly obtain from a complete nutrient solution in soilless culture, here we report the effect of amending the soilless growing medium with different ground mineral rocks (mills) rich in nutrients (phosphate rock, rhyolite, diatomite, dolomite, zeolite and basalt flour) of which 15 g were applied per treatment to each raspberry plant (Rubus ideaus L.) variety fx1522. The applications of different ground rocks increased the fruits K, P, Ca, Mg, S, and Cu mineral contents by 27, 27, 42, 33 and 44 %, respectively. Regarding the CAT enzymatic activity, it was found that the treatments with riolite, diatomite and zeolite increased 54, 45 and 34 % respectively when compared against the control plants. Superoxide dismutase activity and vitamin C content were not altered by the treatments. The treatment with zeolite increased the phenolic compounds by 23%.

Keywords : Soilless cultivation; nutraceutical; antioxidants.