Tesis
Atributos físicos de um latossolo vermelho-amarelo sob diferentes sistemas de manejo na transição Cerrado – Amazônia
Fecha
2014-08-01Registro en:
SAUER, Gerônimo Ricardo. Atributos físicos de um latossolo vermelho-amarelo sob diferentes sistemas de manejo na transição Cerrado – Amazônia. 2014. ix, 33 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Ambientais, Sinop, 2014.
Autor
Freddi, Onã da Silva
Rodrigues, Renato de Aragão Ribeiro
http://lattes.cnpq.br/4005698904195958
http://lattes.cnpq.br/9642805874485976
Freddi, Onã da Silva
301.055.828-75
http://lattes.cnpq.br/9642805874485976
Petter, Fabiano André
906.242.971-87
http://lattes.cnpq.br/3555375204115895
301.055.828-75
055.386.087-94
Magalhães, Ciro Augusto de Souza
014.349.086-90
http://lattes.cnpq.br/7758770757321541
Institución
Resumen
In the search for natural resources conservation, reclamation
and increased productivity of agricultural systems, some technologies have gained
ground as the system integration-Agriculture-Forest (IAFP). Thus it is very important
knowledge about the different aspects of this system and the comparison with other
farming practices. The objective of this study was to evaluate the physical properties
and organic matter in different classes of aggregates under different tillage systems.
The experiment was conducted at the experimental field of Embrapa
agrosylvopastoral, at Sinop, Mato Grosso. The soil at the experimental site is
classified as Red-Yellow Oxisol with clayey horizon with moderate, with gentle relief
wavy 0-8% slope. Were considered as treatments soils subjected to the following
management systems: crop-livestock-forest areas where soy (soy IAFP) and
eucalyptus (Eucalyptus IAFP) were evaluated; pasture with Brachiaria Brizantha; in
monospecific eucalyptus cultivation, and native forest fragment (NTF) as the
reference area. The depths were sampled 0-0.05 m; 0.05-0.10 m; 0.10-0.20 m. The
effects of treatments on macroporosity (Macro) and micro (Micro), total porosity (TP),
bulk density (BD), soil resistance to penetration (RP), mean weight diameter (MWD),
geometric mean diameter (were evaluated DMG) index of aggregate stability (IEA),
percentage of greater than 2 mm (> 2 mm) aggregates and organic matter content in
aggregate classes at different depths. The soil of the FFN highest macroporosity,
microporosity and lower total porosity, density and penetration resistance, when
compared with soils of cultivated areas. Regarding aggregation, soil FFN also had
the highest means. The pasture turn presented DMP, DMG, IEA and> 2 mm larger
than the IAFP, but had more RP. The IAFP eucalyptus showed greater than 2 mm
larger than the IAFP soy aggregates. A reduction of soil aggregation of all treatments
by depth. The organic matter in the different diameters of aggregates were higher in
the surface layer compared to other layers. The effect of culture reduced the organic
matter in almost all diameters of aggregates of the first layer in relation to the FFN.
There was a positive correlation between the organic matter and aggregate Macro,
PT, DMP, DMG, IEA,> 2 mm and a negative correlation with the Micro, Ds and RP. It
is concluded that soil physical properties were altered by management with
decreases in macroporosity and total porosity, increases in soil density, soil
resistance to penetration and reduction of OM contents of the aggregates.