| 泾河上游黄土高原全新世成壤环境演变与人类活动影响 |
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| 引用本文： | 周群英,黄春长,庞奖励.泾河上游黄土高原全新世成壤环境演变与人类活动影响[J].干旱区地理,2004,27(2):142-147. |
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| 作者姓名： | 周群英 黄春长 庞奖励 |
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| 作者单位： | 陕西师范大学旅游与环境学院,西北历史环境与经济社会发展研究中心,西安,710062;陕西师范大学旅游与环境学院,西北历史环境与经济社会发展研究中心,西安,710062;陕西师范大学旅游与环境学院,西北历史环境与经济社会发展研究中心,西安,710062 |
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| 基金项目： | 国家自然科学基金项目 (4 0 0 710 0 6)，教育部重大项目 (0 1JAZJD770 0 14 )资助 |
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| 摘 要： | 通过对黄土高原腹地甘肃合水MJY-A全新世土壤剖面磁化率、粒度、全铁、TOC、TC、CaCO3等气候代用指标的测定分析。结果表明：在全新世早期，黄土高原中部地区气候虽比较温和干燥，风尘堆积速率降低，土壤发育表现为边沉积边成壤的自然过程；到了全新世中期，气候较为温暖湿润，地表植被发育，生物风化成壤作用强烈，土壤发育依旧表现为自然的成壤过程，形成深厚的古土壤-黑垆土(S0)；到了全新世晚期，气候开始恶化，干旱少雨，植被急剧退化，沙尘暴频繁发生，形成的现代黄土层(L0)覆盖了土壤(S0)使之成为埋藏古土壤，土壤发育深受人类活动的影响。现代黄土高原土地资源的退化，并不全是由自然要素本身固有的规律所造成的，而是在自然要素本身变化的背景上叠加了人类活动影响的结果。
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| 关 键 词： | 黄土高原 全新世 成壤环境 人类活动 |
| 文章编号： | 1000-6060(2004)02-0142-06 |
| 修稿时间： | 2003年5月27日 |
Study on the Relationship between the Pedogenetic Environment Changes and Human Impact in the Holocene Soil of the Loess Plateau in the upper Reaches of Jinghe |
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| ZHOU Qun-ying,HUANG Chun-chang,PANG Jiangli.Study on the Relationship between the Pedogenetic Environment Changes and Human Impact in the Holocene Soil of the Loess Plateau in the upper Reaches of Jinghe[J].Arid Land Geography,2004,27(2):142-147. |
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| Authors: | ZHOU Qun-ying HUANG Chun-chang PANG Jiangli |
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| Abstract: | The Holocene loess-soil sequence on the Loess Plateau constitutes an excellent record of evolution of soil formation,monsoonal climate,eolian dust accumulation and influences of arable farming of 8 000 years. A high-resolution soil profile at the MJY-A site on the hinterland of the Loess Plateau at the upper reaches of Jinghe was studied using particle-size analysis,measurement Magnetic susceptibility,total Fe,TOC,TC,and CaCO 3 . The results provide the strength of pedogenesis environment and the impact of human activities on soil development. In the early stage of Holocene,dust deposition was reduced because of the climatic warming,and the biological weathering was beginning. The impact of human activities on soil development is very weak. Soil development appeared a kind of natural process. In the mid-stage of Holocene,climate become warmer and wetter,so the speed of pedogenesis was faster than the dust deposition. The Holocene paleosoil (S 0) was formed. Because of good condition of climate and environment,settled agriculture culture was formed and developed in the region. In late period of the Holocene,because the climate became dryer,the dust-fall happened frequently,and then the speed of the dust deposition was faster than the pedogenesis,so that the recent loess (L 0) was accumulated and covered the soil (S 0) and the S 0 became a buried paleosoil. The change of monsoon caused serious drought and deteriorative environment on the Loess Plateau. At present,on the Loess Plateau,widespread soil erosion and soil resource degeneration is not only the results of the natural law,but also the results of the impact of human activities piling upon the natural law. |
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| Keywords: | Loess Plateau Holocene pedogenesis environment human activities |
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