@Article{CapoaneTiecSant:2017:VaAtSo,
author = "Capoane, Viviane and Tiecher, Tales and Santos, Danilo Rheinheimer
dos",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Federal do Rio Grande do Sul (UFRGS)} and
{Universidade Federal de Santa Maria (UFSM)}",
title = "Varia{\c{c}}{\~a}o de atributos do solo ao longo de tr{\^e}s
topossequ{\^e}ncias no planalto do Rio Grande do Sul",
journal = "Revista Brasileira de Geografia F{\'{\i}}sica",
year = "2017",
volume = "10",
number = "5",
pages = "1435--1454",
keywords = "Uso da terra, posi{\c{c}}{\~a}o topogr{\'a}fica, perfil do
solo, propriedades do solo,Land use, topographic position, soil
profile, soil properties.",
abstract = "Este trabalho investigou os efeitos da topografia e das
pr{\'a}ticas de uso e manejo do solo na variabilidade de alguns
atributos do solo ao longo de tr{\^e}s topossequ{\^e}ncias
localizadas no planalto do Rio Grande do Sul. As
topossequ{\^e}ncias (Tps) est{\~a}o inseridas em uma bacia
hidrogr{\'a}fica situada no munic{\'{\i}}pio de J{\'u}lio de
Castilhos. Na Tp1 foram definidos quatro pontos de amostragem e na
Tp2 e Tp3, cinco pontos. Em cada perfil foram coletadas amostras
em cinco camadas de solo (0\‒5, 5\‒10,
10\‒20, 20\‒40 e 40\‒60 cm). Em
laborat{\'o}rio foram determinados os atributos: densidade,
argila, pH em {\'a}gua, carbono (C) org{\^a}nico total,
f{\'o}sforo (P) total, P org{\^a}nico total, P
dispon{\'{\i}}vel, {\'o}xidos de ferro (Fe) e alum{\'{\i}}nio
(Al) cristalinos e amorfos. Os resultados encontrados mostram que
o movimento de sedimentos em superf{\'{\i}}cie e atrav{\'e}s do
perfil do solo {\'e} controlado pela posi{\c{c}}{\~a}o, forma e
declividade da encosta e, pelas atividades antr{\'o}picas como o
uso e manejo do solo e aplica{\c{c}}{\~a}o de fertilizantes.
Considerando as classes de uso da terra, os maiores teores de C e
P (total, org{\^a}nico e dispon{\'{\i}}vel) foram obtidos na
{\'a}rea {\'u}mida, seguido da lavoura e campo nativo.
Considerando a posi{\c{c}}{\~a}o na encosta os teores de C e P
foram maiores na baixada seguido da base da encosta, topo e meia
encosta. A condi{\c{c}}{\~a}o hidrom{\'o}rfica ao longo das
topossequ{\^e}ncias desempenhou um papel importante na
disponibilidade de P, ac{\'u}mulo C org{\^a}nico total e
solubiliza{\c{c}}{\~a}o dos {\'o}xidos de Fe e Al ABSTRACT:
This work investigated the effects of topography and land use and
soil management practices on the variability of some soil
properties along three toposequences located in the Rio Grande do
Sul plateau, Southern Brazil. The toposequences (Tps) evaluated
are from a watershed located in the municipality of J{\'u}lio de
Castilhos. Soil samples were taken in four points in Tp1 and in
five points in Tp2 and Tp3. In each point samples were taken at
five depths (0\‒5, 5\‒10, 10\‒20, 20\‒
40, and 40\‒60 cm). The soil properties evaluated were soil
density, clay, pH in water, total organic carbon (C), total
phosphorus (P), total organic P, available P, and amorphous and
crystalline iron (Fe) and aluminum (Al) oxides. Results show that
the transport of sediments on the surface and through the soil
profile is controlled by topographic position, landform, slope,
and also by the anthropic activities such as the use and
management of the soil and the application of fertilizers.
Considering the classes of land use, the highest levels of C and P
(total, organic and available) were obtained in the wetlands,
followed by the crop fields and natural grasslands. Considering
the topographic position, the contents of C and P were higher in
the floodplain followed by the base of the slope, top and middle
slope. Hydromorphic conditions along the toposequences played an
important role in P availability, total organic C accumulation and
solubilization of Fe and Al oxides.",
issn = "1984-2295",
label = "lattes: 3598069757374025 1 CapoaneTiecSant:2017:VaAtSo",
language = "pt",
targetfile = "capoane_variacao.pdf",
urlaccessdate = "27 abr. 2024"
}