NUTRIENT REMOVAL OF N, P AND K IN MINT (MENTHA SPICATA L.) CULTIVATED IN SUBSTRATE
The aim of this study was to determine the accumulation of above-ground biomass and nutrient removal of N, P and K in mint (Mentha spicata L.) plants under five nutrient solution (NS) concentrations. The experiment was set up in a shade house located in Xalisco, Nayarit in western Mexico during the spring-summer of 2011, using a commercial cultivar of mint. A randomized complete block experimental design with five replicates and a time series arrangement was used. The harvest days were 20, 40, 60, 80, 100 and 120 days after transplant (DAT), dates on which shoots 15 cm in length, the required size in the international market, were obtained. Steiner solution was used at five concentration levels: 25, 50, 75, 100 and 125%. The growth medium was volcanic slag with 0.3-1 cm granulometry. Plant height, fresh and dry plant biomass and stem diameter were assessed. Nutrient removal of nitrogen, phosphorus and potassium was determined in the different samples in order to understand the absorption dynamics of these elements under commercial management. The results showed that the 100% NS concentration increased plant height (PH) by 34% during the first five cuts. Stem diameter (SD) had no significant differences among treatments. Above-ground fresh biomass (AGFB) and above-ground dry biomass (AGDB) were greater in the 100% NS treatment. Nitrogen, P and K (mg/kg) removal was dependent on the ionic concentration of the nutrient solution. In general, the economic yield (leaves) of mint depends on the nutrient solution concentration.
Juárez-Rosete, C.R., Aguilar-Castillo, J.A., Bugarín-Montoya, R., Arrieta-Ramos, B.G. and Juárez-Rosete , M.E. (2014). NUTRIENT REMOVAL OF N, P AND K IN MINT (MENTHA SPICATA L.) CULTIVATED IN SUBSTRATE. Acta Hortic. 1030, 133-138
nutrient demand, yield, concentration