Soil bulk density and penetration resistance under different tillage and crop management systems and their relationship with barley root growth
Data de publicació2003
MetadadesMostra el registre d'unitat complet
To study the effects of fallow and tillage on soil physical properties and barley (Hordeum vulgare L.) root growth, an experiment was conducted for several years on two soils of contrasting depth: deep, a Fluventic Xerochrept of 120-cm depth, and shallow, a Lithic Xeric Torriorthent of 30-cm depth. Subsoil tillage (ST), minimum tillage (MT), and no-tillage (NT) were compared in the deep soil and MT and NT in the shallow soil. Bulk density (BD), penetration resistance, gravimetric water content, gravel content, and root length density were determined at several times during the year. In the deep soil, BD was lower in the fallow and crop-after-fallow plots (1.26 Mg m−3) than in the continuous-crop plots (1.32 Mg m−3). In this soil, NT showed the largest bulk densities (mean of 1.34 Mg m−3), followed by MT (mean of 1.27 Mg m−3) and ST (mean of 1.22 Mg m−3). Larger penetration resistance was found in NT than in ST and MT in both soils soon after tillage operations. However, root length density profiles sometimes showed greater values for NT than for the other tillage systems, revealing a good soil condition for root growth under NT. Therefore, an increase in soil strength is observed under NT in the first years after its introduction that does not greatly affect root growth in well-structured soils. Fallow reduces soil strength due to the effect of tillage and natural loosening factors like drying and wetting cycles or fauna activity. This effect extends to the following crop.
És part deAgronomy Journal, 2003, vol. 95, núm. 3, p. 526-536
Projectes de recerca europeus
Mostrant elements relacionats per títol, autor i matèria.
Root growth, soil water content and yield of barley under different tillage systems on two soils in semiarid conditions Lampurlanés Castel, Jorge; Angás Pueyo, Pedro; Cantero-Martínez, Carlos (Elsevier, 2001)An experiment was conducted on two soils in a semiarid area in the Spain´s Ebro valley. Soil A was a Fluventic Xerochrept of 120 cm depth and Soil B was a Lithic Xeric Torriorthent of 30 cm depth. Three tillage systems ...
Hydraulic conductivity, residue cover and soil surface roughness under different tillage systems in semiarid conditions Lampurlanés Castel, Jorge; Cantero-Martínez, Carlos (Elsevier, 2006)The objective of this study was to investigate the effect of tillage and cropping system on near-saturated hydraulic conductivity, residue cover and surface roughness to improve soil management for moisture conservation ...
Long-term analysis of soil water conservation and crop yield under different tillage systems in Mediterranean rainfed conditions Lampurlanés Castel, Jorge; Plaza Bonilla, Daniel; Álvaro-Fuentes, Jorge; Cantero-Martínez, Carlos (Elsevier, 2016)This study focuses on the quantification of soil water storage and crop yield under different tillage systems in dryland semiarid Mediterranean conditions. Three long-term tillage experiments based on cereal production ...