Atributos físicos do solo cultivado com plantas de cobertura sob dois regimes hídricos
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Data
2018-02-28
Autores
Ramos, Raquel Cristina
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Universidade Federal do Espírito Santo
Resumo
Among the soil conservation practices used to improve soil quality and
production, we highlight the use of plants with a cover function, which are
arranged on or embedded in the soil surface, contribute to the maintenance
of humidity, reduction of extremes temperature and increase of organic
matter, reflecting positively on the physical attributes of soil. The objective
was to evaluate the physical attributes of the soil with the use of cover crops
under two water regimes for two years in order to contribute to the adoption
of no-tillage system in the northern region of Espírito Santo. The work was
conducted in the field, in a dystrophic Yellow Argisol, using experimental
design in DBC, in subdivided plots, in a 2 x 6 factorial scheme, with four
replications. The cover plants evaluated were: four cultivars of Pennisetum
glaucum (ADR 300, ADR 500, ADRf 6010 and BRS 1501), Brachiaria
ruziziensis and Canavalia ensiformis; the irrigation depths were 76 mm (L1)
and 38 mm (L2). (Ds), total pore volume (VTP), microporosity (Mi),
macroporosity (Ma), geometric mean diameter (DMG) and weighted mean
diameter (DMP); hydraulic conductivity of the saturated soil (Ksat) and soil
penetration resistance (RMP). In the first year of cultivation, few significant
differences were observed in the attributes Ds, DMG and DMP in the 0-0,2
m layer. In general, higher soil densities were observed in the largest leaf,
regardless of the cover species used. Soil density increased in the second
year, but there was the effect of the cover plants on the two irrigation slides
with the time reducing the PR, indicating improvement in soil quality. Cover
plants interfere in the improvement of physical attributes, especially in
situations of water stress. ADRf 6010 is the millet cultivation more indicated
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as a cover plant for 76 mm blade. And B. ruziziensis was the plant with the
best results for 38 mm.
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Palavras-chave
Sowing season , Época de semeadura , Irrigation , Irrigação , Soil cover , Cobertura do solo
Citação
RAMOS, Raquel Cristina. Atributos físicos do solo cultivado com plantas de cobertura sob dois regimes hídricos. 2018. 51 f. Dissertação (Mestrado em Agricultura Tropical) - Programa de Pós-Graduação em Agricultura Tropical, Universidade Federal do Espírito Santo, São Mateus, 2018.