隋唐时期青海草原战争与生态环境研究

作者： 来霞霞   来源： 陕西师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 生态环境   吐谷浑   吐蕃   青海草原  

描述： t Territories distributed a few mature Minority forces,for example: TuYuhun, Tibet, Party items.

全文：,土地利用方式的轮番替换,开垦、耕种、弃耕、放牧、沙化、再开垦,使草原的生态受到影响。当农耕民族统治这块地区时,开垦种田,当游牧民族主宰这块地区时,弃垦放牧。这些开垦的土地,一旦抛弃,疏松多沙,且地表裸露

隋唐时期青海草原战争与生态环境研究

作者： 来霞霞   来源： 陕西师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 生态环境   吐谷浑   吐蕃   青海草原  

描述： t Territories distributed a few mature Minority forces,for example: TuYuhun, Tibet, Party items.

全文：,土地利用方式的轮番替换,开垦、耕种、弃耕、放牧、沙化、再开垦,使草原的生态受到影响。当农耕民族统治这块地区时,开垦种田,当游牧民族主宰这块地区时,弃垦放牧。这些开垦的土地,一旦抛弃,疏松多沙,且地表裸露

基于~（137）Cs技术的中国北方农牧交错带土壤侵蚀研究

作者： 姜洪涛   来源： 内蒙古师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 土壤侵蚀   农牧交错带   ~Cs   示踪  

描述： ttention, but also agriculture and eco-environmental sustainable development important problems. Farming-pastoral Transitional zone in north China, as our county returning farmland to forest and returning cropping land to grassland are the focus areas, natural environment and socio-economic conditions shown a clear transition characterized by the transition zone of the interpenetration and staggered distribution of agriculture and animal husbandry, which is curbing desertification important ecological barrier, but also ecologically fragile belts.

全文：样品,用美国ORTEC公司生产的型号为GMX50P4N型同轴型高纯锗γ探测器探测在不同土地利用方式下的土壤样品中的~(137)Cs含量,测得各土地利用类型中~(137)Cs含量从高到低的顺序为:平草地

秦汉时期中原地区环境的变迁与农耕技术的选择

作者： 王大宾   来源： 郑州大学 年份： 2010 文献类型 ： 学位论文 关键词： 环境变迁   农耕技术选择   中原   秦汉  

描述： 环境对农耕区域及其技术的形成有明显影响。除去社会生产关系因素,制约农耕技术的环境因素大体有气候、水资源、土地和土壤、植被以及人口环境,耕作技术处于多种环境因素的中心。中原地区的农业技术代表传统农业的技术发展水平,秦汉时期中原地区的技术水平及其发展程度是我们认识其分布规律的基础。这一基础形成于先秦时期

全文：环境对农耕区域及其技术的形成有明显影响。除去社会生产关系因素,制约农耕技术的环境因素大体有气候、水资源、土地和土壤、植被以及人口环境,耕作技术处于多种环境因素的中心。中原地区的农业技术代表传统农业

明清时期石羊河流域农业开发与环境变化研究

作者： 栾晓丽   来源： 陕西师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 石羊河流域   农业开发   明清时期   环境变化  

描述： In history;the central and local separatist all valued the development of this area. During the Ming and Qing Dynasties,with the renewed fighting in the northwest, coupled with the rapid growth of the national population, In order to consolidating border defense and detenting Mainland population pressure,the land development of this area resumevted,which impacted histoy development of this area very profoundly Academic research in this area is more included in the academic research for the whole Hexi area or the entire northwest region, special articles in this area are also mainly concentrated in the lower reaches of Shiyang River, but these research the upper, middle and lower reaches of the river as a whole rarely,the connection among the three is.very close essentially.So this object has larger space to continue researching. This text includes introduction and body text.the introduction introduces the writing causes ,implication,and retrospects intellectual history, explains research objectives,Methods and important and difficult points of this object at the same time.The body text divides into six chapters.The first chapter analyzes the natural conditions and social infrastructure in this area.The second chapter mainly deals with immigration status which Ming and Qing government organize and encourage the population in the mainland move to this area,which provides manpower resources for agricultural development in this area,and this chapter discusses effectiveness of the immigration.The third chapter discusses construction of water conservancy which agricultural development requires,and summarizes pearls and pitfalls of water conservancy construction in this area during this period.The fourth chapter mainly deals with agricultural development in this area during the Ming and Qing dynasties,This chapter begin by the reasons for agricultural development and policies which the government urge and offer for, discusses region of agricultural development, reclamation success and evolution of tonden in this area during this time.The fifth chapter mainly discusses environmental problems that because of large-scale development in this period,and analyzes performance, hazard and measures that local people inoder to protecting the environment had taken.The sixth chapter summarizes experience and lessons those because of large-scale development in this period during this time,and explains inspiration for today's development. Research of this object is primarily based on literature of the Ming and Qing Dynasties and local records, and notes data that through field visits get, in order to make the discussion Speci.ficly and reasonably.

全文：巩固边防、缓和内地人口压力,本区的土地开发再一次兴起,这对本区的历史发展产生了深远影响。 学术界对本区的研究多包涵在对整个河西地区乃至整个西北地区的研究当中,专门研究本区的文章也主要集中在下游地区

从仰韶到先周：全新世中晚期气候变化对黄、淮河流域文化发展的影响

作者： 孙倩   来源： 江西师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 黄   考古文化   遗址类型   气候变化   生态坡   淮河流域  

描述： During the mid to late holocene, the human society experienced the alternation of the ancient culture and dynasty.

全文：对气候变化的响应机制,最后分析在全新世中晚期这一时间轴上,生态坡各区域内不同地貌类型的遗址点分布对气候变化的响应机制。最后用生态坡的理论对三类响应作出解释。并得出以下结论:1)气候剧烈波动是生态坡上

甘肃中东部旱作农业区气候变化特征及其对农业生产的影响

作者： 刘艳艳   来源： 西北师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 农业生产   气候变化   生育期   甘肃中东部旱作农业区  

描述： ogical characteristics of the crops and people’s production and business activities, largely dominated by light, heat, water, gas and other climatic factors.

全文：分布以及各气候资源配合协调程度;在此基础上,结合农业观测资料和农业统计相关资料,详细分析了研究区农作物生长发育、产量和农业种植结构的变化特征及其对气候变化的响应规律。 经研究初步得出以下结论:(1)近

中国古代农家文化研究

作者： 熊帝兵   来源： 南京农业大学 年份： 2010 文献类型 ： 学位论文 关键词： 农家   民生   农业史   传统文化  

描述： od of Warring States (475-221 B.C.), attracting scholars' attention and becoming one of important schools then. After Qin Dynasty, scholars determining to study agriculture carried forward good traditions of Non自is in the Period of Warring States, enriched researching contents and fields, and enabled Non自is to develop in depth. In finial, those determining to study agriculture formed a group with researching agriculture as its distinguishing feature. What the group researched included agricultural ideologies, techniques of farming and cropping, methods of operation and management, measures of fighting and preventing agricultural calamities. The whole group showed its own styles in valuing agriculture and concerning people's livelihood. And those agricultural ideologies, science and technology, methods and spirits composed Nongjia's culture, the cream of which can afford us lessons to solve today's new problems.

全文：的关系。土地用养结合思想和农业生产“三宜”原则也随着农家的发展而不断充实和丰富。在系统的农学思想指导下,农家更注重农业技术问题的研究,农业技术也是农家著作的主体内容；农家主要集中于总结土地利用、土壤

中国古代农家文化研究

作者： 熊帝兵   来源： 南京农业大学 年份： 2010 文献类型 ： 学位论文 关键词： 农家   民生   农业史   传统文化  

描述： od of Warring States (475-221 B.C.), attracting scholars' attention and becoming one of important schools then. After Qin Dynasty, scholars determining to study agriculture carried forward good traditions of Non自is in the Period of Warring States, enriched researching contents and fields, and enabled Non自is to develop in depth. In finial, those determining to study agriculture formed a group with researching agriculture as its distinguishing feature. What the group researched included agricultural ideologies, techniques of farming and cropping, methods of operation and management, measures of fighting and preventing agricultural calamities. The whole group showed its own styles in valuing agriculture and concerning people's livelihood. And those agricultural ideologies, science and technology, methods and spirits composed Nongjia's culture, the cream of which can afford us lessons to solve today's new problems.

全文：的关系。土地用养结合思想和农业生产“三宜”原则也随着农家的发展而不断充实和丰富。在系统的农学思想指导下,农家更注重农业技术问题的研究,农业技术也是农家著作的主体内容；农家主要集中于总结土地利用、土壤

从我国古代农业技术的发展看“道”与“技”的辩证关系

作者： 刘培源   来源： 昆明理工大学 年份： 2010 文献类型 ： 学位论文 关键词： 农业技术   “道”与“技”   技术构成   传统文化  

描述： ion hunting economy said to Bianchang into the mother.

全文：发展阶段：其中唐宋时期是南方水田精耕细作的形成时期,其间经济重心从北方转移到南方,南方水田技术配套技术形成,水田专用农具发明与普及,出现了众多农书,土地利用方式增多,南北方农业同时获得大发展