Distribution and storage of crop residue carbon in aggregates and its contribution to organic carbon of soil with low fertility
文献类型：期刊论文
| 作者 | Li, Shuangyi1; Gu, Xin1; Zhuang, Jie2; An, Tingting1; Pei, Jiubo1; Xie, Hongtu3; Li, Hui1; Fu, Shifeng1; Wang, Jingkuan1 |
| 刊名 | SOIL & TILLAGE RESEARCH
 |
| 出版日期 | 2016 |
| 卷号 | 155页码:199-206 |
| 关键词 | Residue Carbon Soil Aggregate Soil Organic Carbon Physical Fraction Mean Residence Time |
| ISSN号 | 0167-1987 |
| DOI | 10.1016/j.still.2015.08.009 |
| 英文摘要 | Long-term intensive cultivation leads to the decrease of soil organic carbon (SOC) and soil fertility. Crop residue amendment to soil is documented as an effective measure to increase SOC and improve soil productivity. However, there is limited information on the turnover and storage of crop residue carbon (C) in soil aggregates after the residue is added to soil with low fertility. The objectives of this research were to investigate the distribution and storage of residue C in soil aggregates and its contribution to different physical fractions of SOC, and to quantify the turnover of residue C in soil with low fertility. Soil samples added with C-13-labelled maize straw residue were put into carborundum tubes for two-year long in-situ incubation. Soil aggregates were separated by wet sieving and then physically fractionated. During the whole incubation process, 12-15% of residue C was stably distributed to 2000-250 mu m aggregates, while the percentage of residue C distributed to microaggregates (<250 mu m) increased with incubation time. The contribution of residue C to particulate organic C (POC) fractions decreased from average 63% on day 60 to average 43% on day 720 and that to mineral-associated organic C (mSOC) fraction increased from average 23% on day 60 to average 28% on day 720. More than 50% of fine POC (fPOC) was derived from residue C, especially 71% in microaggregates on day 360. Within aggregates, the percentages of residue C distributed to free light organic C (fLOC) and coarse POC (cPOC) reduced and these to fPOC and mSOC strengthened with incubation time. Mean residence time (MRT) of residue C was shortened with the increase of the aggregate sizes. MRT of mSOC was longer compared to other SOC physical fractions. These results suggest that microaggregates could provide favorable conditions for microbial activities and conduce to fPOC accumulation in a low fertility soil amendment with crop residue. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000366066200022 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://210.72.129.5/handle/321005/122321]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Wang, Jingkuan |
| 作者单位 | 1.Shenyang Agr Univ, Coll Land & Environm, Shenyang 110866, Liaoning, Peoples R China 2.Univ Tennessee, Dept Biosyst Engn & Soil Sci, Knoxville, TN 37996 USA 3.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shuangyi,Gu, Xin,Zhuang, Jie,et al. Distribution and storage of crop residue carbon in aggregates and its contribution to organic carbon of soil with low fertility[J]. SOIL & TILLAGE RESEARCH,2016,155:199-206. |
| APA | Li, Shuangyi.,Gu, Xin.,Zhuang, Jie.,An, Tingting.,Pei, Jiubo.,...&Wang, Jingkuan.(2016).Distribution and storage of crop residue carbon in aggregates and its contribution to organic carbon of soil with low fertility.SOIL & TILLAGE RESEARCH,155,199-206. |
| MLA | Li, Shuangyi,et al."Distribution and storage of crop residue carbon in aggregates and its contribution to organic carbon of soil with low fertility".SOIL & TILLAGE RESEARCH 155(2016):199-206. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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