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- Title
Effects of Land Management on Different Forms of Soil Carbon in Olive Groves in Mediterranean Areas.
- Authors
Fernández ‐ Romero, María Luisa; Lozano ‐ García, Beatriz; Parras ‐ Alcántara, Luis; Collins, Chris D.; Clark, Joanna M.
- Abstract
ABSTRACT This study analyses soil organic carbon (SOC) and hot-water extractable carbon, both measures of soil quality, under different land management-(i) conventional tillage (CT); (ii) CT plus the addition of oil mill waste alperujo (A); (iii) CT plus the addition of oil mill waste olive leaves (L); (iv) no tillage with chipped pruned branches (NT1); and (v) no tillage with chipped pruned branches and weeds (NT2)-in a typical Mediterranean agricultural area: the olive groves of Andalusia, southern Spain. SOC values in CT, A, NT1 and NT2 decreased with depth, but in NT2, the surface horizon (0-5 cm) had higher values than the other treatments, 47% more than the average values in the other three soils. In L, SOC also decreased with depth, although there was an increase of 88·5% from the first (0-10 cm) to the second horizon (10-16 cm). Total SOC stock values were very similar under A (101·9 Mg ha−1), CT (101·7 Mg ha−1), NT1 (105·8 Mg ha−1) and NT2 (111·3 Mg ha−1, if we consider the same depth of the others). However, SOC under L was significantly higher ( p < 0· 05) at 250·2 Mg ha−1. Hot-water extractable carbon decreased with depth in A, CT and NT1. NT2 and L followed the same pattern as the other management types but with a higher value in the surface horizon (2·3 and 4·9 mg g−1, respectively). Overall, our results indicate that application of oil mill waste olive leaves under CT (L) is a good management practice to improve SOC and reduce waste. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
CARBON in soils; SOIL quality; NO-tillage; SOIL management; ENVIRONMENTAL soil science
- Publication
Land Degradation & Development, 2016, Vol 27, Issue 4, p1186
- ISSN
1085-3278
- Publication type
Article
- DOI
10.1002/ldr.2327