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EFFECTS OF DIRECT DRILL AND CA-AMENDMENT OVER SOME BIOLOGICAL PARAMETERS OF A DEGRADED SOIL IN WESTERN SPAIN
Year:2012
Research Areas
  • Agriculture
Information
Abstract
Acidic soils of Cañamero¿s raña formation in western Spain were cleared and then cropped in the 40¿s of 20th century. As a consequence, extraction of Ca through the harvest resulted in a lower Ca:Al ratio which increased the Al toxicity; also, soil tillage reduced the organic matter content. These effects led to a drastic yield reduction and the retirement of many farmers. This study has evaluated different management strategies (direct drill (DD) vs traditional tillage (TT) ) and a Caamendment application (sugar beet foam + red gypsum (SBF+RG) ) to recover soil quality in this area. The evaluation has involved the study of different enzyme activities (ß-glucosidase, dehydrogenase and ß-glucosaminidase) as biochemical indicators and other parameters such as pH, total organic carbon or microbial biomass carbon (MBC). After 4 years of SBF+RG application and 3 years of DD, the amendment has increased the pH and the DD management has increased soil organic matter content. ß-glucosidase activity has been positively affected by DD, whereas dehidrogenase activity has increased with the amendment and ß-glucosaminidase activity has concentrated around crop residues. The analysis of MBC has shown a negative effect of the amendment but a positive effect of DD (without significant differences in this case). Finally, stratification ratios indicate as well a certain recovery of the natural conditions through the mentioned practices that have been also effective to prevent soil quality losses in other Mediterranean areas.
International
Si
Congress
4Th International Congress EUROSOIL 2012
960
Place
Bari, Italia
Reviewers
Si
ISBN/ISSN
99-9999-999-9
Start Date
02/07/2012
End Date
06/07/2012
From page
1006
To page
1006
Libro de resúmenes del 4Th International Congress EUROSOIL 2012
Participants
  • Autor: Paloma Leon Guadaño (UPM)
  • Autor: Marta Benito Capa (UPM)
  • Autor: Chiquinquira Hontoria Fernandez (UPM)
  • Autor: Clara Gómez Paccard (UPM)
  • Autor: Pedro González-Fernández
  • Autor: Rafael Espejo Serrano (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Calidad de Suelos y Aplicaciones medioambientales
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