甘肃农业大学农耕特色库

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唐代西北地区政治地理格局变动研究: 作者： 魏昀 来源： 陕西师范大学 年份： 2009 文献类型： 学位论文 关键词： 唐朝疆域羁縻府州屯田交通; 描述： th about three of culture and materials the country's territory changed a lot. The country's territory was in an extending period before and the An-Shi Armed Rebellion, and once extended to the Central Asia area.At the same time, the Tang government founded the Ji-Mi-Fu-Zhou system in the Western Regions. The situation changed rapidly when the An-Shi Armed Rebellion broke out. Then the central government mobilized the troops in the Western Regions to participating in putting down the Rebellion, so the border defence was weakened. Tu-bo took the chance to occupy a large amount of territory. Almost Long You Area was oppupied by Tu-bo later in Tang Dynasty. The thesis is divided into five chapters: political geography circumstance in northwest area in early Tang Dynasty，including the situation of physical geography and the nation regime; the political geography situation in the extending period of territory from Tai Zong to Gao Zong;the political geography situation in the stable period of territory from Wu-zhou era to An-Shi Armed Rebellion;the political geography situation in the shrinking period of territory after An-Shi Armed Rebellion;relationship between the change of political geography situation and economy and traffic. Conclusion: From A.D. 7th to 9th century，Asia-Erope Continent was a place where Tang, Da-shi and Tu-bo contended for political space. The country's power of politics, economy and military strengthened before An-Shi Armed Rebellion, and part of the Central Asia area belonged to Tang government. The territory reached to an unparalleled scale at that time, which can be divided into three parts: the capital area where Chang-an and Luoyang were located in was the empire's center of politics, culture and military; the Zheng-zhou that around the captals was where the finance of central government stemmed from; the Ji-mi-fu-zhou system Tang government founded in the frontier area was the military buffer zone with nation regimes in vicnity. At the same time, Tu-bo appeared in the stage of history in A.D 7th century. After the King Song-zan-gan-bu unified the Tibet plateau, Tu-bo's power strengthed rapidly and harassed Tang's frontiers inceasingly. The Tang government put the defense police actively into effect so as to resist Tu-bo's aggression and defend country's benefit in Long-you area. When An-Shi Armed Rebellion broke out, Tu-bo took the chance to occupy vast territory of Tang Dynasty, like Minzhou, Lanzhou, Kuozhou, Guazhou, and so on. Eventually, almost all Long-you areas belonging to Tang Dynasty was occupid by Tu-bo. In the field of geopolitics, the national power strengthened in the earlier stage of Tang Dynasty and stronger than Tu-bo. Tu-bo didn't have the strength contending with Tang Dynasty, even harassed the frontier once a while. Until the An-Shi Armed Rebellion, the Tang government had no more advantage and the national power was weakened.; 全文：。吐蕃崛起并不断侵扰唐朝,为抵御侵略,维护陇右河西地区的安定,唐朝实行了积极的防御政策,有效的阻止了吐蕃的不断进攻。安史之乱爆发后,唐政府抽调安西兵力前往内地平叛,造成边备空虚。吐蕃先后攻陷了岷、兰

清至民国时期（1644-1949）甘肃地区的旱灾与社会应对研究: 作者： 魏光 来源： 陕西师范大学 年份： 2014 文献类型： 学位论文 关键词： 旱灾民国清代甘肃民间力量政府救灾; 描述： 清至民国时期,甘肃地区的旱灾十分频繁,给当地人民的生产与生活造成了极大影响。近年来,甘肃地区更是旱情严重,防旱、抗旱事业日渐成为关系甘肃民生的头等大事。研究清至民国时期甘肃地区的旱灾,总结旱灾的分布规律、分析旱灾的社会影响、探讨当时社会的救灾机制,可以为当前甘肃乃至全国的抗旱事业提供十分重要的参考价; 全文：的社会背景中,评估其实际成效。而灾后补救则主要分为蠲缓、借贷、安辑之策,并分别就其各自的特点进行了分析。民间力量的救灾主要包括士绅的个体救灾、社会组织的专业救灾及外国力量在甘肃旱灾中所提供的帮助。自清末

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