"Análisis comparativo de lixiviación de fertilizantes de fuentes de liberación simple (n-p-k) y fuentes de liberación controlada en Suelos agrícolas del cantón la concordia Provincia santo domingo de los tsáchilas "

Abstract

Fertilizers are a source of leachate, which represents a risk by negatively impacting the environment directly affecting the soil and groundwater. This study aimed to analyze the leachate from fertilizers from simple sources N-P-K controlled release sources in agricultural soils of African palm crops in La Concordia canton. The implemented methodology had a quantitative approach of a mixed type and descriptive level with a randomized complete block design. Ninety samples from two monitors carried out at 15 and 45 days were analyzed through 5 treatments with three replicates for each one (1. Blank; 2. MO+Fc; 3. Fs; 4. Fc; 5. MO-t-Fs) at depths of 15, 30 and 45 cm. A preliminary and post-treatment characterization was done using the Kjeldahl methodology for Nitrogen, UV-visible for phosphorus and AAS for potassium. Through this methodology, it was possible to determine that Nitrogen is in a range of 0.015% to 0.56%; on the other hand, in the results of the Phosphorus analysis, it ranges from 0.154 - 6.376 mg/kg, while from 4.973 - 66,926 meq/100g corresponds to the Potassium analysis. Concerning Organic Matter, it presents values ranging from 5.9% - 20.04%; these data are at a general level concerning the three blocks. It is concluded that as a simple and controlled fertilizer treatment, there is not much difference; the most convenient is to use organic matter before applying any fertilizer since there is less leaching, and the plant can take advantage of all the nutrients that this treatment retains in the soil.