甘肃农业大学农耕特色库

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从游牧到农耕：哈萨克族生计方式选择和文化适应: 作者： 汪俊 来源： 广西民族大学 年份： 2009 文献类型： 学位论文 关键词： 哈萨克族文化变迁生计方式; 描述： azak Autonomous prefecture in Xinjiang .; 全文：本文是笔者在深入新疆伊犁哈萨克自治州察布查尔锡伯自治县查干布拉克村进行了为期三个月的实地调查后完成的。本文主要以查干布拉克村为例,通过参与观察、人物访谈等研究方法,描述并分析了定居哈萨克族生计方式

干旱半干旱地区农田灌溉节水治理模式及其绩效研究: 作者： 刘涛 来源： 南京农业大学 年份： 2009 文献类型： 学位论文 关键词： 灌溉效率用水者协会制度建设自主治理; 描述： the world's resource is 6%, but the average water resource to the world's average level is just 1; 全文：了不同农作物的水资源边际产品价值。研究结果表明：在保持其他投入不变的情况下,每增加1m3水资源的投入,胡麻、克新土豆、油菜、大麦、玉米的边际产品价值为正,其中胡麻的水资源边际产品价值最高；小麦和大蒜的边际

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：时期,国力处于上升阶段,开元时达到鼎盛,较之大食和吐蕃的实力,唐朝占有明显的优势,吐蕃虽然偶尔有侵扰唐朝边地的举动,但并不具备与之抗衡的实力。直到公元751年怛逻斯战役,崛起的大食与唐帝国发生了正面

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