Abstract
Aims
Plant root traits affect soil biopore (BP) formation. Aims of this study were to measure the effects of fodder crop species with contrasting root traits and duration of cropping on BP density (BPD), and also to address the consistency of these effects over different years focusing on the effects of root decay.
Methods
Soil BPD was quantified after growing three perennial fodder crop species with contrasting root systems, namely, lucerne (Medicago sativa L.), chicory (Cichorium intybus L.) and tall fescue (Festuca arundinacea Schreb.) for 1, 2, and 3 years with 2 years fallow in two repeated field trials from 2007 to 2014.
Results
Total BPD after taprooted fodder crops (421 ± 14 m−1) was significantly higher compared with fibrous-rooted crops (337 ± 12 m−1). Cropping duration did not affect soil BPD. On average, density of medium-sized BP (BPmed; 2–5 mm) increased 14 % after 2 years of fallow, whereas BPD decreased by 5 % for coarse-sized BP (BPcor; >5 mm) after the fallow.
Conclusions
Taprooted fodder crops enhanced BP formation into subsoil. Accurate assessment of biopores (BPs) and their persistence must take account of the temporal dynamics, including effects of root decay.
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Acknowledgments
We are grateful to the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) for financing this study under the research units DFG-FOR 1320 and PAK 888. We are also indebted to Dr. Stefan Pätzold for the detailed explanation of the soil condition at the experimental site. We also would like to express our deep appreciation for the contribution of students, especially, Annette Eickelkamp, Tobias Lühring and David Büchler. Essential support from several technicians working at the Institute of Organic Agriculture (IOL), especially Christian Dahn and Frank Täufer, and several others at Campus Klein-Altendorf is also much appreciated.
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This study was funded by Deutsche Forschungsgemeinschaft (DFG-FOR 1320).
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The authors declare that they have no conflict of interest.
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Han, E., Kautz, T., Perkons, U. et al. Quantification of soil biopore density after perennial fodder cropping. Plant Soil 394, 73–85 (2015). https://doi.org/10.1007/s11104-015-2488-3
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DOI: https://doi.org/10.1007/s11104-015-2488-3