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Con el proposito de que plantas de frambuesa cultivadas en sustrato de peat moss y perlita, adquirieran una mayor cantidad de nutrientes minerales de los que comunmente obtienen de una solucion nutritiva completa en cultivo sin suelo, aqui se reporta el efecto de enriquecer el medio de crecimiento (sustrato) con diferentes moliendas de rocas minerales ricas en nutrientes (roca fosforica, riolita, diatomita, dolomita, zeolita y harina de basalto) de las cuales se aplicaron 15 g por tratamiento a cada planta de frambuesa (Rubus ideaus L.) variedad fx1522. Con las aplicaciones de las diferentes rocas molidas se incremento en frutos el contenido mineral de K, P, Ca, Mg, S, y Cu en 27, 27, 42, 33 y 44 %, respectivamente. Con respecto a la actividad enzimatica de la catalasa se encontro que con riolita, diatomita y zeolita aumentaron en 54, 45 y 34 % respectivamente comparados con el testigo. La actividad de superoxido dismutasa y el contenido de vitamina C no se vieron afectadas por los tratamientos. El tratamiento con zeolita incremento los compuestos fenolicos en un 23 %.ABSTRACTIn 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%.

biotecnia

Efecto de enmiendas minerales sobre el contenido mineral y antioxidantes en frutos de frambuesa//Effect of mineral amendments on raspberry fruits mineral content and antioxidants