Reference : Defining a reference system for biological indicators of agricultural soil quality in...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
http://hdl.handle.net/2268/226535
Defining a reference system for biological indicators of agricultural soil quality in Wallonia, Belgium
English
Krüger, Inken Betty [> >]
Chartin, Caroline [> >]
van Wesemael, Bas [> >]
Carnol, Monique mailto [Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Ecologie végétale et microbienne >]
2018
Ecological Indicators
Elsevier
95
568-578
Yes (verified by ORBi)
International
1470-160X
Netherlands
[en] biological indicators ; soil quality ; soil monitoring network ; reference systems ; assessment tools ; Wallonie
[en] Tools that will enable the assessment of agricultural soil quality and include measurements of biological indicators, such as soil respiration or N mineralization, are increasingly in demand. Such tools require the establishment of reference systems to provide comparative ‘baseline’ or ‘normal’ values. In this study, we measured the spatial and seasonal variability of eight biological indicators (including two eco-physiological quotients) in order to establish a reference system at the regional level of Wallonia (Southern Belgium).
Respiration potential, microbial biomass carbon, microbial C/N ratio, net nitrogen mineralisation, metabolic potential of soil bacteria, earthworm abundance, microbial quotient, and metabolic quotient were measured at 60 sites across contrasting agricultural regions (different soil types and climate) in both grasslands and croplands. Additionally, the same biological indicators were measured four times during the vegetation period (April, June, August, and October) in 11 cropland sites to assess seasonal variability. Reference ranges were defined for each biological indicator, based on the addition of variances (seasonal and spatial) and the calculation of cumulative distribution functions.
Land use was the most useful classification variable to define a reference system in Wallonia. Two separate reference systems, one for grasslands and one for croplands, were thus appropriate for Wallonia. Sampling season had a significant effect on all biological indicators. The inclusion of seasonal variability resulted in reference ranges 1.1 to 5.7 times wider than ranges accounting only for spatial variability. The reference system provides a basis for a first comparative assessment of soil quality for most agricultural soils of Wallonia, independent of sampling period.
Service public de Wallonie : Direction générale opérationnelle de l'agriculture, des ressources naturelles et de l'environnement - DG03
Développement d'indicateurs de la qualité biologique et du carbone organique du sol pour l'évaluation de l'état des sols en Wallonie (CARBIOSOL 4)
Researchers ; Professionals
http://hdl.handle.net/2268/226535
10.1016/j.ecolind.2018.08.010

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