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：罗汝敬是明代前期的重要文官,在永乐至正统年间历任侍讲、御史、工部右侍郎等职,曾参与《太祖实录》的第三次修订;两次“抚谕交趾,不辱命”;四次入陕督理屯田,“多所建制”。本文以罗汝敬的生平为主线,重点

甘肃省景泰县农业生态经济系统能值分析: 作者： 林长伟 来源： 兰州大学 年份： 2009 文献类型： 学位论文 关键词： 景泰县可持续发展能值分析农业生态经济系统; 描述： le to measure and compare all kinds of energy.; 全文：: (1)景泰县2007年农业投入总能值及产出总能值分别为7.65×10~(20)sej、9.65×10~(20)sej。投入能值中不可更新工业辅助能所占比例最大。产出能值中种植业和畜牧业能值产出占

明清及民国时期黑河流域中游地区绿洲化荒漠化时空过程研究: 作者： 石亮 来源： 兰州大学 年份： 2010 文献类型： 学位论文 关键词： 干旱区黑河流域明清及民国时期绿洲化与荒漠化时空过程; 描述： had been also analyzed. The results showed that: 1. In the early Ming Dynasty, the study area had; 全文：如下几点： 1.明朝占领黑河流域初期就开始了对这一地区的大规模开发,人工绿洲规模迅速扩大,此后人工绿洲规模开始逐渐萎缩；嘉靖至万历年间,明朝政府重整屯田,人工绿洲规模逐渐恢复并有所发展。 2.清朝时期

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