Capacity of soil to protect organic carbon and biochemical characteristics of density fractions in Ziwulin Haplic Greyxems soil
文献类型：期刊论文
| 作者 | Wang, G; Wang, CY; Wang, WY; Wang, QJ |
| 刊名 | chinese science bulletin
 |
| 出版日期 | 2005 |
| 卷号 | 50期号:1页码:27-32 |
| 关键词 | Ziwulin Haplic Greyxems soil organic carbon physical protection density fractionation |
| 合作状况 | 其它 |
| 中文摘要 | physical protection is one of the important ways to stabilize organic carbon in soils. in order to understand the role of soils as a carbon sink or source in global climatic change and carbon cycles and properly manage soils as a carbon sink, we ought to know how many organic carbon (oc) in a given soil could be protected. by a density fractionation approach and ultrasonic technique, each soil sample was divided into three fractions: free light fraction (free-lf), occluded fraction (occluded-lf) and heavy fraction (hf). the obtained fractions were analyzed for total oc content, carbohydrate content and recalcitrant oc content. the results showed: (i) in the whole soil profile, dominance of oc consistently decreased in the following order: hf, free-lf, occluded-lf. this suggested that oc in soils were mostly protected. from 0-10 to 60-80 cm horizons, the oc in free-lf decreased from 25.27% to 3.72%, while oc in hf they were increased from 72.57% to 95.39%. the oc in occluded-lf was between 2.16% and 0.89%. (ii) organic carbon recalcitrance in free-lf was similar to that in hf, and was even higher than that in hf below the surface horizon. this suggested that free-lf was not always the most fresh and non-decomposed fraction. om quality of hf was higher than that of free-lf in the surface 10 cm below, namely the protected om had higher quality than free om in these horizons. |
| 英文摘要 | physical protection is one of the important ways to stabilize organic carbon in soils. in order to understand the role of soils as a carbon sink or source in global climatic change and carbon cycles and properly manage soils as a carbon sink, we ought to know how many organic carbon (oc) in a given soil could be protected. by a density fractionation approach and ultrasonic technique, each soil sample was divided into three fractions: free light fraction (free-lf), occluded fraction (occluded-lf) and heavy fraction (hf). the obtained fractions were analyzed for total oc content, carbohydrate content and recalcitrant oc content. the results showed: (i) in the whole soil profile, dominance of oc consistently decreased in the following order: hf, free-lf, occluded-lf. this suggested that oc in soils were mostly protected. from 0-10 to 60-80 cm horizons, the oc in free-lf decreased from 25.27% to 3.72%, while oc in hf they were increased from 72.57% to 95.39%. the oc in occluded-lf was between 2.16% and 0.89%. (ii) organic carbon recalcitrance in free-lf was similar to that in hf, and was even higher than that in hf below the surface horizon. this suggested that free-lf was not always the most fresh and non-decomposed fraction. om quality of hf was higher than that of free-lf in the surface 10 cm below, namely the protected om had higher quality than free om in these horizons. |
| 学科主题 | 生物科学 |
| WOS标题词 | science & technology |
| 类目[WOS] | multidisciplinary sciences |
| 研究领域[WOS] | science & technology - other topics |
| 关键词[WOS] | particle-size fractions ; mass-spectrometry ; natural-abundance ; matter fractions ; nmr-spectroscopy ; dynamics ; forest ; c-13 ; pools ; associations |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000227798200006 |
| 公开日期 | 2009-12-24 |
| 源URL | [http://ir.nwipb.ac.cn/handle/363003/1445]  |
| 专题 | 西北高原生物研究所_中国科学院西北高原生物研究所 |
| 作者单位 | 1.Lanzhou Univ, Editorial Board Journal, Lanzhou 710000, Peoples R China 2.Lanzhou Univ, Sch Life Sci, Lanzhou 710000, Peoples R China 3.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China 4.Qinghai Normal Univ, Dept Biol, Xining 810008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, G,Wang, CY,Wang, WY,et al. Capacity of soil to protect organic carbon and biochemical characteristics of density fractions in Ziwulin Haplic Greyxems soil[J]. chinese science bulletin,2005,50(1):27-32. |
| APA | Wang, G,Wang, CY,Wang, WY,&Wang, QJ.(2005).Capacity of soil to protect organic carbon and biochemical characteristics of density fractions in Ziwulin Haplic Greyxems soil.chinese science bulletin,50(1),27-32. |
| MLA | Wang, G,et al."Capacity of soil to protect organic carbon and biochemical characteristics of density fractions in Ziwulin Haplic Greyxems soil".chinese science bulletin 50.1(2005):27-32. |
入库方式： OAI收割
来源：西北高原生物研究所
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