Caracterización Físico-Química Y Microbiológica De Suelos Paramunos Del P.N.N. Sumapaz Sometidos Al Cultivo Convencional Y Orgánico De Papa Post-Descanso De Actividad Agrícola

Abstract

Physicochemical and microbiological characteristics of the soils belonging to the Sumapaz moorland buffer zone under intensive potato farming in El Curubital were characterized. Following a randomized complete block design, the soil was analyzed in plots with different rest periods (2 and 7 years) and three types of sowing (organic, conventional and control). Physical-chemical and microbiological analyzes followed standardized methods for infiltration, color, moisture, texture, nitrogen, phosphorus, total organic carbon, pH and microbial respiration. The results analyzed by ANOVA show in the microbiological analyzes a clear tendency to increase with the rest years in the initial> intermediate stage. Soil chemical analysis shows that most of the values ​​are not affected by the rest time with high values ​​for TOC, and relatively poor in total N and P available. The pH on the other hand remained constant over time. On the other hand the microbiological variables mainly represent statistically significant variations due to the tillage applied during the cultivation process. Finally, it can be concluded that the moderate agricultural rest period (seven years) to which the soils of the Sumapaz moor were subjected seem not to be sufficient for a natural restoration of the physical and chemical properties of these; on the other hand also that the characterization of the soils studied presents representative variations with respect to the soils of the crops under conventional agricultural management.