Physical properties of dystrophic Red Latosol (Oxisol) under different agricultural uses

Revista Brasileira de Ciência do Solo

João Tavares Filho²  Graziela Moraes De Cesare Barbosa¹  Adriana Aparecida Ribon¹ 

[1] ,Londrina State University Department of Agriculture Londrina PR

关键词: land degradation;    land use;    grazing;    sugarcane;    no-tillage farming;    degradação do solo;    uso do solo;    pastagem;    cana-de-açúcar;    plantio direto;   

DOI  :  10.1590/S0100-06832010000300034

来源: SciELO

【 摘 要 】

Obtaining information about soil properties under different agricultural uses to plan soil management is very important with a view to sustainability in the different agricultural systems. The aim of this study was to evaluate changes in certain indicators of the physical quality of a dystrophic Red Latosol (Oxisol) under different agricultural uses. The study was conducted in an agricultural area located in northern Paraná State. Dystrophic Red Latosol samples were taken from four sites featuring different types of land use typical of the region: pasture of Brachiaria decumbens (P); sugarcane (CN); annual crops under no-tillage (CAPD); and native forest (permanent conservation area) (control (C)). For each land use, 20 completely randomized, disturbed and undisturbed soil samples were collected from the 0-20 cm soil layer, to determine soil texture, volume of water-dispersible clay, soil flocculation (FD), particle density, quantity of organic matter (OM), soil bulk density (Ds), soil macroporosity (Ma) and microporosity (Mi), total soil porosity (TSP), mean geometric diameter of soil aggregates (MGD), and penetration resistance (PR). The results showed differences in OM, FD, MGD, Ds, PR, and Ma between the control (soil under forest) and the areas used for agriculture (P, CN and CAPD). The soils of the lowest physical quality were those used for CN and CAPD, although only the former presented a Ma level very close to that representing unfavorable conditions for plant growth. For the purposes of this study, the physical properties studied were found to perform well as indicators of soil quality.

【 授权许可】

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