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ISSN : 2456-8643

Title:
NUTRIENT SOLUTION NO3-:NH4+, CONCENTRATION AND pH IN GROWTH OF Digitalis purpurea L.

Authors:
Reyna Alicia Mitra Garcia, Maria de las Nieves Rodriguez Mendoza, Vicente Arturo Velasco Velasco and Manuel Sandoval Villa.

Abstract:
Fox glove (Digitalis purpurea L.) is a biannual herbaceous plant native to Europe. It is used as an ornamental and has medicinal uses in treatment of cardiac insufficiency. In this study, we evaluated the effect of NO3 - :NH4 + ratio, concentration and pH of the nutrient solution on plant growth. The experiment was conducted in the Colegio of Postgraduados, Campus Montecillo, from January to May, 2016. The design was completely randomized with a 23 factorial: NO3 - :NH4 + ratio (100:0, 80:20), nutrient solution concentration (50%, 100%) and pH (5, 7). Eight treatments with six replications were obtained. We assessed number of leaves, SPAD readings, NO3 - concentration, Ca2+ and K+ in petiole extract, plant height, number of shoots, stem diameter, and plant dry weight. The NO3 - :NH4 + ratio 80:20 significantly increased SPAD readings, Ca2+ concentration, plant height and stem dry weight. The 100% solution significantly increased the number of leaves, NO3 - , Ca2+, and K+ concentrations. pH 5 increased significantly the number of leaves, SPAD readings, NO3 - concentration, number of shoots, and root, stem and leaf dry weight. pH 7 significantly increased K+ concentration. The treatment with the NO3 - :NH4 + ratio of 80:20, 100% solution and pH 5 was that which produced significantly higher values of the variables evaluated.

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