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- Title
Caracterização física de agregados do solo submetido a 10 anos de aplicação de dejetos suínos.
- Authors
Mergen Junior, Carlos Aristeu; Loss, Arcângelo; Dos Santos Junior, Elano; Dupont Giumbelli, Lucas; de Pinho, Daniela; de Abreu, Lucinéia; Rogério Lourenzi, Cledimar; José Comin, Jucinei; Brunetto, Gustavo
- Abstract
Successive applications of swine manure can promote changes in soil physical attributes, with emphasis on the soil aggregation pathways. The objective of this work was to separate and quantify the aggregates according to their training path and to evaluate the stability of these aggregates in an area with a history of applications of pig slurry (PS) and deep litter (DL) in no-tillage system (NTS). After 10 years of use swine manure (SM) in oat/corn succession under NTS, undisturbed soil samples were collected in the 0-5 and 5-10 cm layers, in the treatments without SM (control), with application of PS and DL at doses equivalent to one and two times the recommended N for corn and oats (PS1X, PS2X, DL1X and DL2X, respectively). The aggregates were separated according to their morphological patterns and biogenic and physicogenic formation pathways. Then, weighted average diameter (WMD) of the aggregates and the distribution of the aggregates in the diameter classes for macroaggregates (8.0>Ø =2.0 mm), mesoaggregates (2.0>Ø =0.25 mm) and microaggregates (Ø<0.25 mm) in each type of aggregate were evaluated. The addition of SM increased the formation of biogenic aggregates. In the control area, the formation pathway of physicogenic aggregates prevails. The application of PS did not alter the WMD and the macroaggregates in relation to the control, while the application of DL increased these parameters when compared to the PS and control treatments.
- Subjects
NATIONAL Trust for Scotland; SWINE manure; SOIL sampling; ANIMAL litters; SLURRY; CORN; OATS
- Publication
Revista de Ciencias Agricolas, 2019, Vol 36, Issue 1, p79
- ISSN
0120-0135
- Publication type
Article
- DOI
10.22267/rcia.193601.100