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dc.contributor.author | Zang H. | |
dc.contributor.author | Blagodatskaya E. | |
dc.contributor.author | Wen Y. | |
dc.contributor.author | Xu X. | |
dc.contributor.author | Dyckmans J. | |
dc.contributor.author | Kuzyakov Y. | |
dc.date.accessioned | 2018-04-05T07:10:00Z | |
dc.date.available | 2018-04-05T07:10:00Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 1757-1693 | |
dc.identifier.uri | http://dspace.kpfu.ru/xmlui/handle/net/130128 | |
dc.description.abstract | © 2017 John Wiley & Sons Ltd. The stability and turnover of soil organic matter (SOM) are a very important but poorly understood part of carbon (C) cycling. Conversion of C 3 grassland to the C 4 energy crop Miscanthus provides an ideal opportunity to quantify medium-term SOM dynamics without disturbance (e.g., plowing), due to the natural shift in the δ 13 C signature of soil C. For the first time, we used a repeated 13 C natural abundance approach to measure C turnover in a loamy Gleyic Cambisol after 9 and 21 years of Miscanthus cultivation. This is the longest C 3 -C 4 vegetation change study on C turnover in soil under energy crops. SOM stocks under Miscanthus and reference grassland were similar down to 1 m depth. However, both increased between 9 and 21 years from 105 to 140 mg C ha -1 (P < 0.05), indicating nonsteady state of SOM. This calls for caution when estimating SOM turnover based on a single sampling. The mean residence time (MRT) of old C ( > 9 years) increased with depth from 19 years (0-10 cm) to 30-152 years (10-50 cm), and remained stable below 50 cm. From 41 literature observations, the average SOM increase after conversion from cropland or grassland to Miscanthus was 6.4 and 0.4 mg C ha -1 , respectively. The MRT of total C in topsoil under Miscanthus remained stable at ~60 years, independent of plantation age, corroborating the idea that C dynamics are dominated by recycling processes rather than by C stabilization. In conclusion, growing Miscanthus on C-poor arable soils caused immediate C sequestration because of higher C input and decreased SOM decomposition. However, after replacing grasslands with Miscanthus, SOM stocks remained stable and the MRT of old C 3 -C increased strongly with depth. | |
dc.relation.ispartofseries | GCB Bioenergy | |
dc.subject | 13 C natural abundance | |
dc.subject | C -C vegetation change 3 4 | |
dc.subject | Carbon sequestration | |
dc.subject | Energy crop | |
dc.subject | Mean residence time | |
dc.subject | Soil organic matter | |
dc.title | Carbon sequestration and turnover in soil under the energy crop Miscanthus: Repeated <sup>13</sup>C natural abundance approach and literature synthesis | |
dc.type | Article in Press | |
dc.collection | Публикации сотрудников КФУ | |
dc.source.id | SCOPUS17571693-2017-SID85033722767 |