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Agriculture, ecosystems and environment: Long-term soil carbon loss and accumulation in a catchment following the conversion of forest to arable land in northern Laos

បោះពុម្ពផ្សាយដោយ៖ Village Focus International

agriculture is encroaching rapidly on tropical mountain due to demographic and economic pressure that accelerate deforestation. such disruption cause soil loss along catchment slopes, landslide and sediment transfer to lake and impoundments resulting in widespread land degradation, soil organic carbon depletion linked to erosion is of major importance in agriculture

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មើល​ធនធានទិន្នន័យ - Agriculture, ecosystems and environment: Long-term soil carbon loss and accumulation in a catchment following the conversion of forest to arable land in northern Laos

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  • ភាសាអង់គ្លេស
ប្រធានបទ
  • Agriculture
  • Ecosystems
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តំបន់ភូមិសាស្រ្ត (ការលាតសន្ធឹងក្នុងលំហ)
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© 2013 Elsevier B.V

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Corresponding author. Tel.: +33 1 44 27 72 82; fax: +33 1 44 27 41 64. E-mail address: sylvain.huon@upmc.fr (S. Huon). et al., 2002; Wezel et al., 2002 ). Moreover, eroded carbon, once in the river network and subject to mineralization, may contribute to greenhouse gas emissions ( Lal, 2003 ). Soil erosion studies con- ducted from plot to hill slope scales are frequently used to assess soil organic carbon detachment and transport by overland flow ( e.g. , Bellanger et al., 2004 ) but it remains difficult to upscale these results to the catchment level because they are often subject to threshold effects ( Lugo and Brown, 1993; Turkelboom et al., 2008 ), involve different processes ( e.g. , Poesen et al., 1996 ) and do not account for deposition along slopes and valley bottoms ( Chaplot and Poesen, 2012 ). The catchment unit appears to be an appropriate scale because it integrates topography and other land characteris- tics as well as how cultivation responds to them. Moreover, this unit is often repeated in the landscape and may be used for out scaling. In Southeast Asia smallholders who practice shifting cultivation clear the forest predominantly on sloping land. Although slash-and-burn 0167-8809/$ – see front matter © 2013 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.agee.2013.02.007

សហអ្នកនិពន្ធ (បុគ្គល) Sylvain Huon a , ∗ , Anneke de Rouw b , Philippe Bonté c , Henri Robain b , Christian Valentin b , Irène Lefèvre c , Cyril Girardin a , Yann Le Troquer b , Pascal Podwojewski b , Oloth Sengtaheuanghoung d
កន្លែងបោះពុម្ភផ្សាយ SciVerse ScienceDirect
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កាលបរិច្ឆេទបោះពុម្ព 2013
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