Influência de diferentes sistemas de pastejo sobre as propriedades físicas e agregação em solos de cerrado
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Data
2010-09
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Editor
Evandro Novaes
Resumo
The objective of this study was to evaluate soil structure
alterations that occurred in a typical Red distroferric Latossol
under different grazing systems. In 2004, soil samples from
three depths (0-2 cm, 2-7 cm, and 30-35 cm) were collected
in a farm owned by the College of Veterinary of the Federal
University of Goiás, Goiânia, Goiás State, Brazil, as it follows:
I) soil under pasture with Panicum maximum cv. Tanzania, in a
rotational grazing system, clump position (“C”); II) soil under
pasture with Panicum maximum cv. Tanzania, in a rotational
grazing system, among clumps position (“AC”); III) soil under
pasture with Cynodon dactilum cv. Tifton 85, in a continuous
grazing system; and IV) soil under Savannah, as reference. The
implantation of pastures with Tifton 85 and Tanzania grasses
changed physical properties of the soil, through the reduction
of macropores (MAC) and increase in soil density (SD). Soils
under pastures with Tifton 85 and Tanzania grasses (“C”
position) presented larger mean geometric diameter (MGD),
if compared to the soils under Savannah and pasture with
Tanzania grass (“AC” position). Alterations in soil structure
were more significant in the topsoil layer (0-2 cm and 2-7 cm
depth). Stocking rates practiced in the pastures with Tifton 85
and Tanzania grasses were excessive and also the main reason
for deteriorating physical soil properties.
Descrição
Palavras-chave
Cynodon dactilum, Panicum maximum, Pastejo contínuo, Pastejo rotacionado, Taxa de lotação, Continuous grazing system, Rotational grazing system, Stocking rate
Citação
PEREIRA, Silvano Alves; OLIVEIRA, Geraldo César de; KLIEMANN, Huberto José; BALBINO, Luiz Carlos; FRANÇA, Aldi Fernandes de Souza; CARVALHO, Eduardo Rodrigues de. Influência de diferentes sistemas de pastejo sobre as propriedades físicas e agregação em solos de cerrado. Pesquisa Agropecuária Tropical, Goiânia, v. 40, n. 3, p. 274-282, jul./set. 2010. Disponível em: <https://www.revistas.ufg.br/pat/article/view/5353/7368>.