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http://hdl.handle.net/10174/12448
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Title: | Soil phosphorus retention in a Mediterranean pasture subjected to differential management |
Authors: | Serrano, João Shahidian, Shakib Marques da Silva, José |
Issue Date: | 2014 |
Citation: | Serrano, J., Shahidian, S., Marques da Silva, J. (2014). Soil phosphorus retention in a Mediterranean pasture subjected to differential management. European Journal of Soil Science, 65(4), 562-572. (DOI: 10.1111/ejss.12141) |
Abstract: | The objective of this study was to test a simple input-output model to estimate soil phosphorus (P) retention
over 12 years in a Mediterranean pasture. A 6-ha permanent pasture field in Southern Portugal was subjected to
different management systems in terms of grazing and fertilizer application. The soil and pasture were monitored
and samples were geo-referenced with RTK GPS. The model was developed to explain the effect of P fertilizer,
based on the premise that P added through fertilizer and amounts removed in harvested plant products are the
main fluxes affecting available P status, and was used to estimate the soil P retention. The results show that
P fertilizer addition to Mediterranean grazed pastures on shallow soils influences several P dynamics under
different grassland management systems. A positive linear relationship between the P budgets and the changes
in measured P was demonstrated over the study periods. This work highlights the difficulty associated with the
creation of recommendation maps for differentiated P fertilizer application in pastoral systems and indicates that
before any accurate decision making, the historic knowledge of changes in the concentrations of P in the soil
should be considered, as well as a prediction of the residual effects of applied nutrient. The importance of this
knowledge increases when the aim is to use techniques and technologies for variable-rate fertilizer application
and implementation of site-specific management strategies in the context of precision agriculture. |
URI: | http://hdl.handle.net/10174/12448 |
Type: | article |
Appears in Collections: | ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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