caa a22 4500 606220305 CHVBK 20210128101123.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11104-015-2473-x doi (NATIONALLICENCE)springer-10.1007/s11104-015-2473-x Influence of soil inorganic nitrogen and root diameter size on legume cover crop root decomposition and nitrogen release [Elektronische Daten] [Arun Jani, Julie Grossman, Thomas Smyth, Shuijin Hu] Aims: Legume cover crops are primarily grown for their contribution to soil N pools, but the effect that this added N has on cover crop root decomposition and N release is poorly understood. Our primary objective was to determine the effect that soil N and root diameter size have on root decomposition and N release. Methods: We determined coarse (>1-mm diameter) and fine (<1-mm diameter) root distribution for crimson clover (Trifolium incarnatum) and hairy vetch (Vicia villosa Roth) using greenhouse-grown plants, and followed with a 12-week incubation in which coarse and fine roots from both species were incubated under natural and elevated (200kgha−1) soil N levels. Results: Crimson clover and hairy vetch consisted primarily of fine roots (≥79%), which decomposed and released N faster than coarse roots. Soil N addition had a small positive effect on root decomposition, but an inconsistent effect on root N release. There was a net increase in soil inorganic N for all treatments after 12weeks. Conclusion: These results improved our understanding of decomposition and N release from crimson clover and hairy vetch roots, and are valuable to farmers seeking to better manage soil C and N pools. Springer International Publishing Switzerland, 2015 Legume cover crops nationallicence Root decomposition nationallicence Fine and coarse roots nationallicence Nitrogen release nationallicence Jani Arun Department of Soil Science, North Carolina State University, PO Box 7619, 27695, Raleigh, NC, USA aut Grossman Julie Department of Horticulture, University of Minnesota, 454 Alderman Hall, 1970 Folwell Avenue, 55108, St. Paul, MN, USA aut Smyth Thomas Department of Soil Science, North Carolina State University, PO Box 7619, 27695, Raleigh, NC, USA aut Hu Shuijin Department of Plant Pathology, North Carolina State University, PO Box 7616, 27695, Raleigh, NC, USA aut Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 57-68 0032-079X 393:1-2<57 2015 393 11104 https://doi.org/10.1007/s11104-015-2473-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2473-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jani Arun Department of Soil Science, North Carolina State University, PO Box 7619, 27695, Raleigh, NC, USA aut NATIONALLICENCE 700 1- Grossman Julie Department of Horticulture, University of Minnesota, 454 Alderman Hall, 1970 Folwell Avenue, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Smyth Thomas Department of Soil Science, North Carolina State University, PO Box 7619, 27695, Raleigh, NC, USA aut NATIONALLICENCE 700 1- Hu Shuijin Department of Plant Pathology, North Carolina State University, PO Box 7616, 27695, Raleigh, NC, USA aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 57-68 0032-079X 393:1-2<57 2015 393 11104