Evolución de la acidez en un ultisol a la aplicación de cal y respuesta en el desarrollo vegetativo del cultivo de café (coffea arabica l.), en pueblo nuevo del cantón Loja

Coffee production constitutes a of the main economic activities in the province of Loja, which occupies 13,5% of the 199 215 ha cultivated in Ecuador, with productivity of 0,25 t.ha-1; the low yield caused by acidity and lack of replacement of soil fertility is a problem that affects the coffee growing areas of the province. The research work was developed of September 2019 to February 2020, in the Pueblo Nuevo sector of the Loja canton, in an acid soil with 40 % slope that is classified as Kandiudults, with the purpose to generate knowledge about the effect of the application of agricultural lime (CaCO3) in the correction of acidity and the availability of nutrients in the agroforestry system of coffee (Coffea arabica L.), for this, the chemical properties of the soil and the dasometric variables of coffee were monitored, in an experimental design of random blocks, with 0, 5,0 and 6,3 t.ha-1 of CaCO3 and three replicates, the experimental units received equal doses of fertilization (N, P, K, Mg, S , Zn and B). The results show that the doses of 5,0 and 6.3 t.ha-1 of CaCO3 did not present significant differences: the pH evolved from 5,6 to 6,2; acidity and interchangeable aluminum were reduced to undetectable levels, the CIC went from low to medium and the percentage of base saturation increased to medium soil range, the contents of N, P, S, K, Ca, Mg, Cu, Zn and B remain in high range, while Fe and Mn are reduced. As for the monitoring of dasometric variables there is similarity between the values obtained in the treatments with application of lime and significant statistical differences with respect to the control. Keywords: acidity, agricultural lime, Coffea arabica L, pH, dasometric variables.

• מחבר ראשי: Guayanay Castillo, Marvin Gabriel (author)
• פורמט: bachelorThesis
• שפה: spa
• יצא לאור: 2021
• נושאים: CAFÉ; COFFEA ARABICA; CAL
• גישה מקוונת: https://dspace.unl.edu.ec/jspui/handle/123456789/23917