A new net mineralizable nitrogen assay improves predictions of floristic composition

摘要: Question: Can a simple measurement of nitrogen (N) availability be related to an ecologically relevant response, i.e. mean Ellenberg N indicator value (EN)? Location: UK (England,Wales and Scotland). Methods: Soil cores from stratified sample habitats were analysed for mineralizable with conventional incubation new flushing method, which uses single mineral extraction. Predictions EN using other soil measurements assessed by fitting linear mixed-effect models, the Akaike information criterion (AIC) as measure model parsimony. Results: Mineralizable method described component variation in that was more orthogonal bulk properties such moisture content, total N/C ratio pH than conventionally measured N. improved accuracy predictions obtained only measurements, appeared best two-term threeterm models. Conclusions: Much can ratio, or but distinguishes is independent these properties. The will useful studies exposure plants N, particular when assessing pollution effects on plant species composition.