000224863 001__ 224863
000224863 005__ 20190829172533.0
000224863 0247_ $$2doi$$a10.1016/j.catena.2016.10.010
000224863 022__ $$a0341-8162
000224863 02470 $$2ISI$$a000390733300038
000224863 037__ $$aARTICLE
000224863 245__ $$aLand-use change affects phosphorus fractions in highly weathered tropical soils
000224863 260__ $$bElsevier Science Bv$$c2017$$aAmsterdam
000224863 269__ $$a2017
000224863 300__ $$a9
000224863 336__ $$aJournal Articles
000224863 520__ $$aDeforestation and land-use change in tropics have increased over the past decades, driven by the demand for agricultural products. Although phosphorus (P) is one of the main limiting nutrients for agricultural productivity in the tropics, the effect of land-use change on P availability remains unclear. The objective was to assess the impacts of land-use change on soil inorganic and organic P fractions of different availability (Hedley sequential fractionation) and on P stocks in highly weathered tropical soils. We compared the P availability under extensive land-use (rubber agroforest) and intensive land-use with moderate fertilization (rubber monoculture plantations) or high fertilization (oil palm monoculture plantations) in Indonesia. The P stock was dominated by inorganic forms (60 to 85%) in all land-use types. Fertilizer application increased easily-available inorganic P (i.e., H2O-Pi, NaHCO3-Pi) in intensive rubber and oil palm plantations compared to rubber agroforest However, the easily-available organic P (NaHCO3-extractable Po) was reduced by half under oil palm and rubber. The decrease of moderately available and non-available P in monoculture plantation means that fertilization maintains only the short-term soil fertility that is not sustainable in the long run due to the depletion of P reserves. The mechanisms of this P reserve depletion are: 1) soil erosion (here assessed by C/P ratio), 2) mineralization of soil organic matter (SOM) and 3) P export with yield products. Easily-available P fractions (i.e., H2O-Pi, NaHCO3-Pi and Po) and total organic P were strongly positively correlated with carbon content, suggesting that SOM plays a key role in maintaining P availability. Ecologically based management is therefore necessary to mitigate SOM losses and thus increase the sustainability of agricultural production in P-limited, highly weathered tropical soils. (C) 2016 Elsevier B.V. All rights reserved.
000224863 6531_ $$aLand-use change
000224863 6531_ $$aRainforest deforestation
000224863 6531_ $$aPhosphorus fractions and stocks
000224863 6531_ $$aCarbon-to-phosphorus ratio
000224863 6531_ $$aHedley fractionation
000224863 6531_ $$aErosion consequences
000224863 6531_ $$aAgroforestry
000224863 700__ $$uGeorg August Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Busgenweg 2, D-37077 Gottingen, Germany$$aMaranguit, Deejay
000224863 700__ $$uGeorg August Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Busgenweg 2, D-37077 Gottingen, Germany$$aGuillaume, Thomas
000224863 700__ $$uGeorg August Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Busgenweg 2, D-37077 Gottingen, Germany$$aKuzyakov, Yakov
000224863 773__ $$j149$$tCatena$$q385-393
000224863 909C0 $$xU11021$$pECOS$$0252129
000224863 909CO $$qENAC$$particle$$ooai:infoscience.tind.io:224863
000224863 917Z8 $$x268199
000224863 937__ $$aEPFL-ARTICLE-224863
000224863 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000224863 980__ $$aARTICLE