甘肃农业大学农耕特色库

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米兰古代水利工程与屯田建设: 作者： 饶瑞符 来源： 新疆地理 年份： 2016 文献类型： 期刊 关键词： 兵团农二师新疆地理古代丝绸之路南道专业工作者勘察设计九六内部刊物中西文化交流古城遗址; 描述： 屯垦戍边,新疆生产建设兵团农二师于一九六四年开始对米兰绿洲行进勘查和规划设计,从此一个新型的国营农场在这里诞生了。笔者同农二师勘察设计队的同志们一起,在勘察工作中发现了米兰古代水利工程遗址。一九六五年

屯田的生财之道: 作者： 翁礼华 来源： 浙江经济 年份： 2016 文献类型： 期刊 关键词： 生财之道民屯商屯国有土地财政支出军粮供应前元财政收入元狩汉军; 描述： 的农业生产组织形式,就是屯田。屯田生财是增加财政收入,减少财政支出的一项有效手段。屯田有军屯、民屯、商屯三种。屯田,最早始于边防军粮需要。西汉前元十一年(前169),汉文帝以罪人、奴婢和招募的农民戍边屯田,以解决边防军军粮供应短缺问题。正式军屯则始于汉武帝时期,元狩四年(前119)汉军击败匈奴

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：的军事冲突,四年之后的安史之乱,更使得唐在与吐蕃、大食的角逐中的优势不复存在。由此,唐朝在政治军事上开始处于“守势”,已不能与唐前期的国家实力相提并论。

渭河流域旱涝灾害研究: 作者： 段文明 来源： 中国科学院研究生院(教育部水土保持与生态环境研究中心) 年份： 2012 文献类型： 学位论文 关键词： 旱涝时空分布旱涝事件气候变化渭河流域; 描述： 渭河流域是中华文明的发祥地，涉及甘肃、宁夏、陕西三省（区）。地处黄土高原南缘，秦岭北麓，属大陆性季风气候区、干旱地区和湿润地区的过渡地带。春暖干旱，夏季热而多雨但有伏旱，秋凉湿润，冬季干燥寒冷雨雪稀少。流域自然生态系统脆弱，对气候变化的反应敏感，抵御自然变化能力差。旱涝灾害是渭河流域主要的气象灾害，; 全文：渭河流域旱涝演变趋势及旱涝时空分布特征，研究旱涝与气候变化关系及旱涝灾害事件。主要的研究进展如下： 1.渭河流域近540年旱涝等级演变规律：在世纪尺度的干湿类型上，渭河流域15世纪末、16世纪属干旱

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