Effects of oil mill wastes on surface soil properties, runoff and soil losses in traditional olive groves in southern Spain

In Spain, agriculture triggers soil degradation and erosion processes. New strategies have to be developed to reduce soil losses and recover or maintain soil functionality in order to achieve a sustainable agriculture. This experiment was designed to evaluate the effect of two olive mill wastes (oli...

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Bibliographic Details
Published in:Catena (Giessen) 2011-06, Vol.85 (3), p.187-193
Main Authors: Lozano-García, B., Parras-Alcántara, L., del Toro Carrillo de Albornoz, M.
Format: Article
Language:English
Subjects:
Agriculture
Alperujo
available water capacity
Bgi / Prodig
bulk density
Erosion
food processing wastes
groves
Leaves
Mills
Oil mill waste
olive oil
Olives
organic matter
Pedology
Physical geography
physicochemical properties
porosity
rain
rainfall simulation
Rainfall simulator
Roughness
Runoff
Soil (material)
soil erosion
Soil losses
sustainable agriculture
Wastes
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Summary:In Spain, agriculture triggers soil degradation and erosion processes. New strategies have to be developed to reduce soil losses and recover or maintain soil functionality in order to achieve a sustainable agriculture. This experiment was designed to evaluate the effect of two olive mill wastes (olive leaves and “alperujo”) on soil properties and soil erosion in a rain fed olive grove in SE Spain. After three years experiment, oil mill wastes application significantly improved physical and chemical properties of the studied soil with respect to control. The organic matter content, bulk density and porosity were increased, which confirmed the interactions of these properties. Available water capacity increased with olive leaves but decreased when applied “alperujo”. With respect to erosion, after simulated rainfall experiments it was found that the oil mill wastes contributed to increase the roughness and the interception of raindrops, delaying runoff generation and enhancing the infiltration of rainwater. Treatment with oil mill wastes contributed to a reduction in runoff generation and soil losses compared to bare soil, especially when applied olive leaves. ► We added olive mill wastes (olive leaves, “alperujo”) on rain fed olive grove soil. ► We compared the effect of olive leaves and “alperujo” on soil properties and soil erosion. ► Oil mill wastes application significantly improved physical and chemical properties. ► Oil mill wastes contributed to a reduction in runoff generation and soil losses. ► Olive leaves are recommended: they reduce erosion and increasing the water available.
ISSN:0341-8162
1872-6887
DOI:10.1016/j.catena.2011.01.017