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| Humus composition and humification degree of humic acids of alpine meadow soils in the northeastern part of the Qinghai-Tibet Plateau | |
| Han, Beibei; Kitamura, Kyoko; Hirota, Mitsuru1; Shen, Haihua2; Tang, Yanhong3,4; Suzuki, Takeshi; Fujitake, Nobuhide | |
| 2019 | |
| 发表期刊 | SOIL SCIENCE AND PLANT NUTRITION
 |
| ISSN | 0038-0768 |
| 卷号 | 65期号:1页码:11-19 |
| 摘要 | The characteristics of humus composition are important for understanding the mechanism of carbon storage in the Qinghai-Tibet Plateau. The aim of this study was to characterize the quality of soil organic matter (SOM) in this region. Soil samples from four soil profiles in fenced study sites in the alpine grassland were collected at altitudes of 4200, 4000, 3800, and 3400 m, along the southwest facing slope in the Qilian Mountains. The humus composition and humification degree of the humic acid (HA) were determined by two methods: (1) extraction with 0.5% sodium hydroxide (NaOH) followed by 0.1 M sodium pyrophosphate (Na4P2O7) (OH-PP method); and (2) treating once with 0.1 M hydrochloric acid (HCl) followed by extracting with 0.5% NaOH (Cl-OH method). Physico-chemical analysis revealed higher exchangeable cation content and higher base saturation ratios could be related to slightly acidic to neutral soils, which could be regarded as calcium (Ca)-rich soils. The amounts of combined-form HAs obtained by HCl pretreatment (HA(Cl) - HA(OH); increment HA(Cl)) were remarkably higher than those extracted with Na4P2O7 (HA(PP)), indicating that the combined form of HAs is mainly Ca. In addition, the proportion of HA(PP) in the total HAs extracted with both NaOH and Na4P2O7 (HA(OH) + HA(PP)) obtained in the OH-PP method increased with soil depth and decreasing elevation, indicating that HAs associated with aluminum (Al) and iron (Fe) were distinguished in the subsoils of lower elevation. Therefore, the formation of the organo-mineral complex may contribute to stabilizing SOM in the Qinghai-Tibet Plateau. Moreover, Type A-HA with the highest degree of humification was obtained from the deeper horizons with the Cl-OH method and almost all horizons by extraction with Na4P2O7 in the OH-PP method. Further studies using various spectroscopic analyses are necessary to elucidate the chemical properties of SOM in this region. |
| 关键词 | Classification humic acid (HA) humification degree humus composition Qinghai-Tibet Plateau |
| 学科领域 | Plant Sciences ; Environmental Sciences ; Soil Science |
| DOI | 10.1080/00380768.2018.1547098 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | CA-ORGANIC INTERACTIONS ; AGGREGATE STABILITY ; ALTITUDINAL GRADIENT ; SOUTHERN TIBET ; CARBON ; GRASSLANDS ; MATTER ; SEQUESTRATION ; SUBSTANCES ; PALEOSOLS |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Agriculture |
| WOS记录号 | WOS:000458167400002 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 文献子类 | Article |
| 出版地 | ABINGDON |
| EISSN | 1747-0765 |
| 资助机构 | JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [15H02805, 15H05111, 15H01730] |
| 作者邮箱 | fujitake@kobe-u.ac.jp |
| 作品OA属性 | Bronze |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/19389 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Kobe Univ, Grad Sch Agr Sci, Kobe, Hyogo, Japan 2.Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki, Japan 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 4.Peking Univ, Minist Educ, Dept Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 5.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Beibei,Kitamura, Kyoko,Hirota, Mitsuru,et al. Humus composition and humification degree of humic acids of alpine meadow soils in the northeastern part of the Qinghai-Tibet Plateau[J]. SOIL SCIENCE AND PLANT NUTRITION,2019,65(1):11-19. |
| APA | Han, Beibei.,Kitamura, Kyoko.,Hirota, Mitsuru.,Shen, Haihua.,Tang, Yanhong.,...&Fujitake, Nobuhide.(2019).Humus composition and humification degree of humic acids of alpine meadow soils in the northeastern part of the Qinghai-Tibet Plateau.SOIL SCIENCE AND PLANT NUTRITION,65(1),11-19. |
| MLA | Han, Beibei,et al."Humus composition and humification degree of humic acids of alpine meadow soils in the northeastern part of the Qinghai-Tibet Plateau".SOIL SCIENCE AND PLANT NUTRITION 65.1(2019):11-19. |
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| 00380768.2018.pdf（1265KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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