Physical Properties of Soil Structures Identified by the Profil Cultural under Two Soil Management Systems
| Autor: | Cristiane de Conti Medina, João Tavares, Sônia de Fátima Schilickmann Macedo, José Edézio da Cunha, Maria de Fátima Guimarães, Michel Grimaldi |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
soil porosity Soil Science Soil science 01 natural sciences soil bulk density Soil management Hydraulic conductivity Soil functions compaction lcsh:Agriculture (General) Porosity Hydrology 04 agricultural and veterinary sciences lcsh:S1-972 Bulk density Soil structure Oxisol soil use Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Revista Brasileira de Ciência do Solo, Volume: 41, Article number: e0160503, Published: 31 JUL 2017 Revista Brasileira de Ciência do Solo v.41 2017 Revista Brasileira de Ciência do Solo Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS Revista Brasileira de Ciência do Solo, Vol 41, Iss 0 |
| Popis: | Soil structure plays an important role in water retention, infiltration capacity, porosity, and penetration resistance. The aim of this study was to evaluate the unsaturated hydraulic conductivity and physical properties of Oxisol soils (bulk density and macro-, micro-, and total porosity) in the structures identified using the profil cultural method in areas under two different management practices (perennial pasture and sugarcane). Three pits were dug in each plot to find out how homogeneous morphological structural units (HMSU) were organized in the soil. Next, unsaturated hydraulic conductivity (Ki) was measured in situ inside each HMSU using a triple-ring infiltrometer at multiple suction. Six samples were collected (two samples for each kind of structural organization in each pit) to determine soil bulk density, total porosity, and macro- and microporosity. Each management practice resulted in a distribution of structures in the soil profile. The behavior of morphologically similar clods was the same, regardless of the physical manipulation of the soil. The distribution of structures based on the management practice determines specific hydraulic conductivities in the soil profile. |
| Databáze: | OpenAIRE |
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