|
Descripción
|
|
|---|---|
| Tillage impacts on soil biological activity which is a vital component of soil fertility and in greenhouse gases emissions. In 2003 an experiment with four representative tillage regimes in Scotland began. The treatments, in order of soil disruption were: zero tillage (Z), minimum tillage (M), conventional tillage (C; to 20 cm), and deep ploughing (D; to 30-40 cm). A parallel residue-incorporation experiment was established in the same field where the treatments were; no application of organic manure (0), forty t/ha of slurry (40) and two hundred t/ha of compost (200). Residues were incorporated and seedbeds prepared by minimum tillage to 15 cm depth. We also studied the uncropped grass (G) reference area between the two experimentals. The objective of this study was to understand how all these managements affect the ?-glucosidase activity which is a key enzyme in the C-cycle. With this end, two principal sampling at two depths were done; one in winter 2007 and other in summer 2009 with two other samplings of the grass reference area in 2011. The results showed that the depth of tillage negatively affected the ? -glucosidase activity in the topsoil and that the 200 treatment did not improve its activity. The traditional disruption of soil structure required to create seedbeds affects negatively this soil quality indicator. We also found signific seasonal variability of this biological parameter which showed maxima in Scotland in summer, which did not correspond with previous studies in Spain | |
|
Internacional
|
Si |
|
Nombre congreso
|
19th. ISTRO Conference. Striving for Sustainable High Productivity |
|
Tipo de participación
|
960 |
|
Lugar del congreso
|
Montevideo, Uruguay |
|
Revisores
|
Si |
|
ISBN o ISSN
|
11-1111-111-1 |
|
DOI
|
|
|
Fecha inicio congreso
|
24/09/2012 |
|
Fecha fin congreso
|
28/09/2012 |
|
Desde la página
|
0 |
|
Hasta la página
|
0 |
|
Título de las actas
|
Libro de actas |