关键词
甘南藏族自治州游牧人口定居的机制、模式和效应研究
作者: 王娟娟   来源: 兰州大学 年份: 2009 文献类型 : 学位论文 关键词: 机制   效应   甘南   模式   游牧人口定居  
描述: f the Qingzang plateau.Gannan is adjacent to Qinghai province in west,to Sichuan province in south,to the southern of Gansu province in east and to the Loess plateau in north.Mountainous country and plateau are its major landforms types.It is a highest
全文:能力严重降低,可持续发展阈值范围不断缩小,如果继续发展游牧畜牧业,甘南的草地生态环境系统将面临崩溃。基于这种状况,1986年甘南启动了关乎牧民千秋万代的大工程——游牧人口定居,游牧人口的生产
陕北绿色农业模式研究
作者: 晁团光   来源: 西北农林科技大学 年份: 2009 文献类型 : 学位论文 关键词: 陕北   模式   农业可持续发展   绿色农业  
描述: d the fragile district of ecology of our country .
全文:源开发为主导产业的外延式发展模式,在经济发展的同时,也伴随着新的环境污染与生态破坏,对当地农业的可持续发展造成了严重的威胁。同时,传统农业耕作粗放,加之过去滥垦滥伐,过度放牧,水土流失和土壤风蚀沙化加剧
城乡一体化进程中农业景观之生活美学初探
作者: 袁柳军   来源: 中国美术学院 年份: 2009 文献类型 : 学位论文 关键词: 场所精神   多元   城乡一体化   生活美学   近郊农业  
描述: as formed a series of mufti-value connected with productive function gradually during the process of `living',and it has affected the development of China deeply.
全文:)趋势严重威胁着中国传统农耕文化的传承。 本文主要是基于城乡一体化和生活美学日渐兴盛的大背景下,对当下近郊农业发展的一种反思。论文初步探讨了中国传统农业景观在不断“生活”化过程中所形成的多元价值,以及
订单农业发展中风险管理体系创新研究
作者: 么峥   来源: 浙江大学 年份: 2009 文献类型 : 学位论文 关键词: 衍生品订单   期权订单定价   保险订单   订单农业   农业风险管理  
描述: em of low
全文:订单农业在解决我国“三农”问题时已显示出独特的功能。然而在其发展过程中出现了履约率低的突出问题,严重阻碍了它的进一步发展。本文旨在为我国订单农业的发展过程中建立完善的风险分散机制与制定合理的价格
敦煌绿洲农业生态安全评价
作者: 白杨   来源: 西北师范大学 年份: 2009 文献类型 : 学位论文 关键词: P   R模型   S   多层次多目标模糊优选模型   农业生态安全   敦煌绿洲   熵值法  
描述: e.
全文:近几十年来,随着全球人地矛盾的日趋尖锐,生态环境在总体上呈现恶化趋势,主要表现为土地退化加剧,生态平衡失调,植被破坏严重,生物多样性锐减等。人类正在不断面临新的威胁,影响国家安全的因素已不仅仅是国防
历史时期青海地区自然灾害与区域社会经济发展研究
作者: 刘雯   来源: 西北农林科技大学 年份: 2009 文献类型 : 学位论文 关键词: 青海地区   自然灾害   历史时期   社会效应  
描述: e distinctive features in Western and Eastern of Qinghai's natural disaster in history which based on the historical materials and studied the Interaction Relationship Between the natural disasters and social-economic development, we used the theory and analysis method from the research area of disaster history and agricultural history, try to have a comprehensive investigation between the natural disasters and social-economic development in the history of Qinghai. Firstly, we divided Qinghai into two parts: the eastern and the western, under the study of the geographical features of Qinghai. We summarized the natural disaster of the eastern part mainly as flood, drought, hailstone and frost with distinctive features of variety, continuity and growth accompany while the western is mainly as earthquake and snow disaster with distinctive features of unexpected and severity. Secondly , as the great influence on agriculture and the resulting changement in agriculture is most profound, so the progress in agriculture sciences is related to withstand the natural disaster in some ways. The paper discussed the natural disasters affected Qinghai's agriculture in history, from the aspect of seed selection 、 production 、 processing and storage to invest the development of mitigation techniques in this area. And for the livestock we investigated in two sides bred of livestock and prevention of livestock, furthermore we invested the mitigation techniques which full of geographical characteristics. Thirdly, the article investigated the relationship between natural disasters and the economic fluctuation in Qinghai from the perspective of the change in population and grain price. And then, we analyzed the influence on regional industrial structure from the aspect of expansion in rural areas, the relationship between agriculture and animal husbandry, disaster-relief crop introduction and the structure of animal species. In the view of pastoral economic exchange, we studied the interaction relationship between the natural disasters and economic development. Finally, we studied the interaction relationship between the natural disasters and social development in Qinghai. What is more, we analyzed the policy which includes grain storage, relieved and help the people in disaster , reduced taxes to control the disaster in history. We wish these could be helpful to the prevention and control of natural disasters in Qinghai today.
全文:为主的自然灾害存在着多样性、增长性、连续性、伴生性的特点;青海西部以地震、雪灾为主的自然灾害则更具突发性和严重性。 其次,由于农业在自然灾害中所受影响最大,由此带来的一系列改变也最为深刻,农业科技的进步
陕北地区特色农业发展战略研究
作者: 卢小雅   来源: 西北农林科技大学 年份: 2009 文献类型 : 学位论文 关键词: 战略研究   特色农业发展   陕北地区   农业可持续发展  
描述: as well as improving market competitive power to highlight the regional characteristic and allocate production factors according to the entire resources superiority and characteristic as well as market demand by advanced technology so as to establish the non-balanced and distinctive agricultural production system characterized by moderate scale, favorable benefit and strong market competitive power.
全文:的问题是:土地资源相对不足且退化严重,水土流失加剧,自然灾害频繁,土地污染严重,人地矛盾突出,宏观管理失控等,这些限制因素直接影响到该地区农业可持续发展。本文以农业推广学、农业市场学、资源经济学的基本原理
我国农产品品牌建设:理论与实践
作者: 张可成   来源: 山东农业大学 年份: 2009 文献类型 : 学位论文 关键词: 品牌建设流程   品牌建设要素   农产品品牌   建设实践  
描述: Agricultural products are not only the main commodities for human life but also the commodities with strong concealment of quality.
全文:农产品是人类赖以生存的主要商品,也是质量隐蔽性很强的商品。传统品牌理论认为质量隐蔽性严重的商品需要利用品牌进行产品质量特征的集中表达和保护。可现实中,农产品品牌建设严重滞后于工业产品品牌和服务产品
中国古代土壤改良技术研究
作者: 陈凡学   来源: 南京农业大学 年份: 2009 文献类型 : 学位论文 关键词: 中国古代   农业技术   土壤改良  
描述: eat attention to adopting various techniques to improve soil quality when plowing the soil, so that the soil could keep sustainable fertility and high rate of yield.
全文:现阶段我国土壤环境状况堪忧,包括土壤污染严重、肥力下降、土壤次生盐渍化等问题。深入研究中国古代土壤改良技术,对于当前土壤施肥、中低产田改造、土壤生态保护等,都有很好的借鉴意义。
现代农业中的农民科技文化素质研究
作者: 侯雪锐   来源: 中国地质大学(北京) 年份: 2009 文献类型 : 学位论文 关键词: 农民素质   现代农业   农民科技文化素质  
描述: evelopment status and level of modernization and social stability and national independence is the most important foundation of the national economy, not only the relationship between state and the affections of the global, stable, and the relationship between workers to relationships and coordinated development between urban and rural areas and rural industrialization and urbanization is the necessary condition.
全文:文化水平的低下不仅普遍削弱了他们接受新知识、新技术的能力,同时也严重制约了农村劳动力转移的规模和速度,影响我国农业劳动力转业层次的提高。提高农民科技文化素质直接关系到中国农业现代化的进程,为适应
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