Martinez I., Ovalle C., Del Pozo A., Uribe H., Valderrama N., Prat Christian, Sandoval M., Fernandez F., Zagal E. (2011). Influence of conservation tillage and soil water content on crop yield in dryland compacted alfisol of Central Chile. Chilean Journal of Agricultural Research, 71 (4), p. 615-622. ISSN 0718-5820.
Titre du document
Influence of conservation tillage and soil water content on crop yield in dryland compacted alfisol of Central Chile
Année de publication
2011
Auteurs
Martinez I., Ovalle C., Del Pozo A., Uribe H., Valderrama N., Prat Christian, Sandoval M., Fernandez F., Zagal E.
Source
Chilean Journal of Agricultural Research, 2011,
71 (4), p. 615-622 ISSN 0718-5820
Chilean dryland areas of the Mediterranean climate region are characterized by highly degraded and compacted soils, which require the use of conservation tillage systems to mitigate water erosion as well as to improve soil water storage. An oat (Avena sativa L. cv. Supernova-INIA) - wheat (Triticum aestivum L. cv. Pandora-INIA) crop rotation was established under the following conservation systems: no tillage (Nt), Nt + contour plowing (Nt+Cp), Nt + barrier hedge (Nt+Bh), and Nt + subsoiling (Nt+Sb), compared to conventional tillage (Ct) to evaluate their influence on soil water content (SWC) in the profile (10 to 110 cm depth), the soil compaction and their interaction with the crop yield. Experimental plots were established in 2007 and lasted 3 yr till 2009 in a compacted Alfisol. At the end of the growing seasons, SWC was reduced by 44 to 51% in conservation tillage systems and 60% in Ct. Soil water content had a significant (p < 0.05) interaction with tillage system and depth; Nt+Sb showed lower SWC between 10 to 30 cm, but higher and similar to the rest between 50 to 110 cm except for Ct. Although, SWC was higher in conservation tillage systems, the high values on soil compaction affected yield. No tillage + subsoiling reduced soil compaction and had a significant increment of grain yield (similar to Ct in seasons 2008 and 2009). These findings show us that the choice of conservation tillage in compacted soils of the Mediterranean region needs to improve soil structure to obtain higher yields and increment SWC.
Plan de classement
Erosion et conservation des sols [068EROSOL]
;
Travail du sol [076AGRO04]
Descripteurs
SOL DEGRADE ; INDURATION ; CONSERVATION DU SOL ; PRATIQUE CULTURALE ; TRAVAIL DU SOL ; STRUCTURE DU SOL ; HUMIDITE DU SOL ; EAU DU SOL ; DEFICIT HYDRIQUE ; RENDEMENT ; PRODUCTION AGRICOLE ; BLE ; LABOUR
Description Géographique
CHILI ; ZONE ARIDE
Localisation
Fonds IRD [F B010054326]
Identifiant IRD
fdi:010054326
