甘肃农业大学农耕特色库

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明罗汝敬事功研究: 作者： 王敬伟 来源： 兰州大学 年份： 2009 文献类型： 学位论文 关键词： 罗汝敬事功西北开发; 描述： g Bu between Yong Le and Zheng Tong. He had participated in the third recession of ,Ming Dynsty called troops back from An Nan(The Fouth and Fifth Chapter) and affirms his role on the the mutation relationship between Ming Dynasty and An Nan. Luo Rujing took an important part in the development of Shan Xi Military-Farmsettlement for ten years. He had made enormous contribution on Shan Xi Military-Farmsettlement's restoration and water conservancy facilities management. Compared with the later period of Yong Le, Shan Xi military farm settlement has restored greatly on a stage as intermediate period of Xuan De. With Luo Rujing's absent from Shan Xi, Military一Farmsettlement in northwest of Ming Dynasty degraded obviously. "Paeificated Jiao Zhi, Carried out the mission successfully" and had come into ShanXi four times to manage in the opening up wasteland and "He contributes in many aspects".; 全文：叙述罗汝敬代表明政府从安南撤军期间的所作所为,对罗汝敬在明安关系的转变中所起的作用给予肯定;罗汝敬对陕西军屯的发展可谓殚精竭虑,其在陕时间长达八年,对陕西军屯的恢复和水利设施的管理贡献巨大,使宣德中期陕西军屯与永乐后期相比有较大恢复。随着罗汝敬的离陕,明代西北的军屯从此一蹶不振。

中国北方现代人扩散与农业起源的环境考古学观察: 作者： 吉笃学 来源： 兰州大学 年份： 2007 文献类型： 学位论文 关键词： 文化对环境的响应 BP事件新旧石器过渡中晚期过渡现代人起源农业起源新石器末次盛冰期 7.2 6.4kyr; 描述： 环境考古学是通过环境和文化之间关系的研究来揭示人类如何适应环境变化，如何调整自己的状态以缓解各种压力，从而实现规避风险保全自己的目的，为人类未来的生存和发展提供有益的借鉴。人类对环境变化的反应一般采取两种策略：一是响应；二是适应。目前，现代人扩散和农业起源是了解和认识人类适应策略的最理想的案例。为; 全文：的环境反应模式。结果发现： 1．在22kyr BP和21kyr BP左右的末次盛冰期，宁夏彭阳和甘肃秦安相继出现了与现代人有关的细石器制品，说明现代人已扩散到陇西黄土高原的腹地。 2．ZL005地点的黄土

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