摘要
历史时期的北洛河流域曾是森林草原植被景观,在全新世时期,气候温润、植被茂密、动物繁衍、河流水量充沛、含沙量轻微。但由于自然因素,尤其是人为因素的影响,这里变成了濯濯童山。其中人口增加是生态环境严重恶化的根本原因,其次是政府所采取的垦殖政策,不合理的农耕制度与耕作技术,以及林政及山林产权等导致了生态环境的恶化。
Once, the Beiluo River VaUey in historical period was sylvosteppe vegetation landscape. During the Holocene period, the climate was warm and moist, vegetation was dense, animals were multiplies, rivers were plentiful of water yield, silt content was slight. But because of the natural factors, especiaUy the mankind, Beiluo River Valley had become bare hills. Among them, the population increasing is the root cause of ecological environment worsing gravaly. Secondly, government adopts the policy of cultivartion, unreasonable farming system, technique, forest policy and property right of mountain forest, which leads to the ecological environment worsingly.
出处
《延安大学学报（社会科学版）》
2007年第2期79-81,共3页
Journal of Yan'an University (Social Sciences Edition)
基金
延安大学资助课题(项目编号:YDK2005-037)
关键词
北洛河流域
植被变迁
人为因素
Beiluo River Valley
vegetation change
artificial element
