Evaluación de soluciones nutritivas y frecuencias de aplicación en el crecimiento de plántulas de Oreopanax ecuadorensis Seem (Pumamaqui) en la parroquia Ulba, cantón Baños de Agua Santa, provincia de Tungurahua

Abstract

The present investigation poses to assess nutrient solutions and application frequency in the plant growth of Orepanax ecuadorensis Seem (Pumamaqui) at Ulba sector, Baños de Agua Santa Canton, Tungurahua Province. The following nutrient solutions were used: 0,5 g/l Ammonium nitrate, 1 g/l Ammonium nitrate, 1,5 g/l Ammonium nitrate, 0,25 g/l Mono – ammonium phosphate, 0,50 g/l Mono – ammonium phosphate, 0,75 g/l Mono – ammonium phosphate, 0,25 g/l Mono – ammonium phosphate + 0,25 g/l potassium sulfate, 0,50 g/l Mono – ammonium phosphate + 0,50 g/l potassium sulfate and 0,75 g/l Mono – ammonium phosphate + 0,75 g/l potassium sulfate with an application frequency of every 2, 4 and 6 days each one. By merging them, 27 treatments were produced plus and absolute control treatment. The following parameters were evaluated every 15 days: height (ft), diameter (mm) and leaf number. The best treatment in high was A9B2 (0,75 g/l Mono – ammonium phosphate + 0,75 g/l potassium sulfate applied every 4 days), the best treatment in diameter was A8B1 (0,50 g/l Mono – ammonium phosphate + 0,50 g/l potassium sulfate applied every 2 days), whereas the best treatment for leaf number was A9B2 (0,75 g/l Mono – ammonium phosphate + 0,75 g/l potassium sulfate applied every 4 days). Upon doing the cost analysis for the treatments with nutrient solutions, it was determined that the treatment with the best cost was A9B3 (0,75 g/l Mono – ammonium phosphate + 0,75 g/l potassium sulfate applied every 6 days) with a production cost of 0.28 dollars per plant. Key words: nutrient solutions, application frequency, plant grow.