Agregação do solo em diferentes sistemas de manejo para produção de hortaliças

Abstract

In the conventional vegetable production system, soil structure, especially aggregation, can be affected by soil turning, degrading organic matter. As an alternative, it would be possible to use a different management system, such as a notillage system for vegetables, with the aim of increasing the use of vegetation cover and reducing tillage. The objective of the present work is to evaluate the soil aggregation in the layers 0-10 and 10-20 cm in the lettuce crop, after 5 years of different soil management for vegetable production. The work was carried out in the experimental area of UFFS, campus Cerro Largo-RS, where the experiment was installed in 2018 with the following treatments: conventional system without covering (SCsC), conventional system with covering (SCC), no-tillage without covering (PDsC ) and vegetable no-tillage system (SPDH). The experimental design used is randomized blocks, with five replications. The results were subjected to analysis of variance and Tukey's test at 5% probability. The methodology was followed according to the standard wet method and for the visual evaluation the DRES method was followed. There was a significant difference in the visual evaluation of the first layer, where no-tillage without cover stood out from the others, in the second layer there was no significant difference. In the evaluations of Weighted Average Diameter and Geometric Average Diameter, there was no significant difference between managements. There was also no significant difference between the classes of aggregates.