| 周原全新世土壤剖面木炭屑与野火活动的关系研究 |
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| 引用本文： | 谭志海,黄春长,庞奖励,李平华.周原全新世土壤剖面木炭屑与野火活动的关系研究[J].中国生态农业学报,2005,13(2):31-33. |
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| 作者姓名： | 谭志海 黄春长 庞奖励 李平华 |
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| 作者单位： | 陕西师范大学旅游与环境学院,西安,710062 |
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| 基金项目： | 教育部重点项目 (0 2 0 69)，黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目 (10 5 0 1 10 5 )资助 |
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| 摘 要： | 研究陕西周原全新世黄土剖面磁化率曲线、总有机碳曲线、木炭屑曲线和野火活动及其与生态环境演变的关系结果表明,马兰黄土堆积时期气候干旱,在当时半荒漠草原上当地时常有自然野火发生;全新世大暖时期(85 0 0～310 0aB .P)气候湿润,生物成壤作用强度大,呈现森林或森林草原自然景观,野火活动极少发生;先周人迁居到周原地区(310 0aB .P)开始,人类用火及其放火烧荒开垦农田等活动,加之气候变得干旱,生物化学成壤作用减弱,致使生态环境发生重大变化,自然生态景观向半自然、半人工景观演替;15 0 0aB .P开始可耕种土地几乎开垦殆尽,生态景观完全被人工农田生态景观所代替;而近几百年来随着人口密度和聚落的增加,人类生活用火和垃圾随之加大,人类对土壤环境的干扰进一步增强
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| 关 键 词： | 野火 生态演替 全新世 关中盆地 木炭屑 |
| 收稿时间： | 2003/12/16 0:00:00 |
| 修稿时间： | 2003年12月16 |
Relationship between soil charcoal in Holocene and wildfire in the Zhouyuan Region |
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| TAN Zhi-Hai,HUANG Chun-Chang,PANG Jiang-Li and LI Ping-Hua.Relationship between soil charcoal in Holocene and wildfire in the Zhouyuan Region[J].Chinese Journal of Eco-Agriculture,2005,13(2):31-33. |
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| Authors: | TAN Zhi-Hai HUANG Chun-Chang PANG Jiang-Li and LI Ping-Hua |
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| Abstract: | The relationships among soil charcoal in Holocene,wildfire and its change of ecological environment were studied.The results show that in the phase of piling of Malan loess,the climate was arid and wildfire often occurred on semi?desert grassland.During the period of soil formation,bio?pedogenic processes were so active that forests or forest?grassland formed with the arrival of humid warmer climate of the Holocene Megathermal.Therefore,the wildfire activities seldom occurred.However,by the time of 3100aB.P,with the settlement of Zhouyuan people and human manipulation of the environment through the use of the fire,great changes had taken place,varying from natural ecology to semi?natural and semi?artificial ecology.Since 1500aB.P,the arable farmland almost disappeared,resulting in artificial ecology in place of natural ecology.For hundreds of years,with the growth of the world population,tremendous requirements of fires had increased with a large amount production of rubbish and human activities had also caused great damage to the soil environment. |
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| Keywords: | Wildfire Change of ecology Holocene Guanzhong Basin Charcoal |
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