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DOI | 10.1016/j.geoderma.2019.03.039 |
Effect of crop residue addition on soil organic carbon priming as influenced by temperature and soil properties | |
Lenka, Sangeeta1; Trivedi, Pankaj2,3; Singh, Brajesh2,4; Singh, Bhupinder Pal5; Pendall, Elise2; Bass, Adrian2,6; Lenka, Narendra Kumar1 | |
发表日期 | 2019 |
ISSN | 0016-7061 |
EISSN | 1872-6259 |
卷号 | 347页码:70-79 |
英文摘要 | Priming of soil organic carbon (SOC) is a crucial factor in ecosystem carbon balance. Despite its increasing importance in the changing global climate, the extent of influence of temperature and soil properties on the priming effect remains unclear. Here, soil priming was investigated using C-13 labeled wheat residues in two cultivated, subtropical (Vertisol) and semi-arid (Luvisol), soils of Australia at four incubation temperatures (13, 23, 33 and 43 degrees C). The priming effect was computed from respired CO2 and associated delta C-13, which were measured periodically over the 52-day incubation period. Wheat residue addition resulted in greater priming effect in the Luvisol (1.17 to 2.37% of SOC) than the Vertisol (0.02 to 1.56% of SOC). The priming of SOC was the highest at 23 degrees C in the Luvisol, and at 43 degrees C in the Vertsiol, which indicates a variable positive priming effect of temperature in different soil types. Wheat residue addition significantly increased the temperature sensitivity (Q(10)) of SOC mineralization in the Vertisol at temperature ranges below 33 degrees C (i.e., 13-23 and 23-33 degrees C) and had no significant effect in the Luvisol. A negative correlation was observed between temperature and the Q(10) values. Across soils, the Q(10) of residue C was lower than SOC suggesting that soil C is more vulnerable to climatic warming. This work demonstrates that the magnitude of SOC priming by wheat residue and Q(10) of SOC mineralization varied significantly with soil type (Luvsiol > Vertisol) and incubation conditions (temperature and time). Given the current trend towards increasing atmospheric temperatures, future studies should evaluate temperature effects on the priming of different pools of SOC induced by crop residue in different agro-ecosystems. |
WOS研究方向 | Agriculture |
来源期刊 | GEODERMA
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/101471 |
作者单位 | 1.Indian Inst Soil Sci, Bhopal 462038, India; 2.Western Sydney Univ, Hawkesbury Inst Environm, Penrith, NSW 2570, Australia; 3.Colorado State Univ, Bioagr Sci & Pest Management, Ft Collins, CO 80523 USA; 4.Western Sydney Univ, Global Ctr Land Based Innovat, Penrith, NSW 2570, Australia; 5.Elizabeth Macarthur Agr Inst, NSW Dept Primary Ind, Menangle, NSW 2568, Australia; 6.Univ Glasgow, Sch Geog & Earth Sci, Univ Ave, Glasgow G12 8QQ, Lanark, Scotland |
推荐引用方式 GB/T 7714 | Lenka, Sangeeta,Trivedi, Pankaj,Singh, Brajesh,et al. Effect of crop residue addition on soil organic carbon priming as influenced by temperature and soil properties[J],2019,347:70-79. |
APA | Lenka, Sangeeta.,Trivedi, Pankaj.,Singh, Brajesh.,Singh, Bhupinder Pal.,Pendall, Elise.,...&Lenka, Narendra Kumar.(2019).Effect of crop residue addition on soil organic carbon priming as influenced by temperature and soil properties.GEODERMA,347,70-79. |
MLA | Lenka, Sangeeta,et al."Effect of crop residue addition on soil organic carbon priming as influenced by temperature and soil properties".GEODERMA 347(2019):70-79. |
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