Release of carbon and nitrogen from fodder radish (Raphanus sativus) shoots and roots incubated in soils with different management history
| Autor: | Bent T. Christensen, Teng Hu, Jørgen E. Olesen, Peter Sørensen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Soil Science Raphanus chemistry.chemical_element klim 01 natural sciences Fodder Incubation biology Chemistry carbon mineralisation Soil organic matter fodder radish root nitrogen mineralisation 04 agricultural and veterinary sciences fodder radish shoot incubation biology.organism_classification Nitrogen Horticulture Soil water Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science Carbon 010606 plant biology & botany nitrogen minieralisation |
| Zdroj: | Hu, T, Olesen, J E, Christensen, B T & Sørensen, P 2018, ' Release of carbon and nitrogen from fodder radish (Raphanus sativus) shoots and roots incubated in soils with different management history ', Acta Agriculturae Scandinavica, Section B-Soil & Plant Science, vol. 68, no. 8, pp. 749-756 . https://doi.org/10.1080/09064710.2018.1480730 |
| DOI: | 10.1080/09064710.2018.1480730 |
| Popis: | Plant roots are generally considered to decompose slower than shoots and contribute more to accumulation of soil organic matter, and management history is expected to shape the structure and function of decomposer communities in soil. Here we study the effect of chemical characteristics of shoots and roots from fodder radish (Raphanus sativus oleiformis L.), a widely used cover crop, on the release of their C and N after addition to soil. Shoots and roots were incubated for 180 d at 20°C using four soils with different management histories (organic versus mineral fertiliser, with and without use of cover crops), and the release of CO2 and extractable mineral N was determined. More shoot C than root C was mineralised during the first 10 d of incubation. After 180 d, 58% of the C input was mineralised with no difference between shoots and roots. At the end of incubation, shoots had released more N (42% of shoot N) than roots (28% of root N). Moreover, management history did not affect net mineralisation of added plant C. Residues incubated in soil with a management history involving cover crops showed an enhanced net N mineralisation. Therefore, long-term decomposition of C added in radish shoots and roots is unaffected by differences in chemical characteristics or soil management history. However, the net mineralisation of N in shoots is faster than for N in roots, and net N mineralisation of added materials is higher in soil with than without a history of cover crops. |
| Databáze: | OpenAIRE |
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