草田轮作在黄土高原丘陵沟壑区旱作农业中的作用研究

作者： 曹利民   来源： 兰州大学 年份： 2010 文献类型 ： 学位论文 关键词： 可持续发展   草田轮作   循环农业模式  

描述： by mountains. Forage crop rotation systems could improve soil fertility, increase crop外eld and provide

全文：,对草田轮作在旱作农业中的作用和地位进行了分析,调研了该区草田轮作推广的模式和分布区域,获得如下主要论点： (1)对甘肃省天水市旱作农业区生产条件和现状分析,草田轮作是适合该区农业生产条件的一种科学

明代河州岷州洮州军屯研究

作者： 肖文清   来源： 兰州大学 年份： 2010 文献类型 ： 学位论文 关键词： 河州   明代   岷州   洮州   军屯  

描述： y, military and culture in Ming Dynasty。The research on military farming of the Ming Dynasty played the vital role of leading as to the research on the outline the history of the Ming Dynasty. The Military Farming in three states-- He Min and Tao-in Ming Dynasty, as the epitome of the Ming Dynasty Northwest military Farming, has its characteristics. He Min and Tao military farming not only has the common characteristic of that period, but also has its unique distinguishes, because which is located at the junction of the Han and other ethnic groups, within the area lived many ethnic minorities. In this paper, the author analyzes the relevant historical materials and uses theories and methods of history and ethnology to explain the origin, development, characteristics of the military farming. And the author discusses the reasons why they declined in the later years and the impacts in a detailed and intensive way. Based on local historical dates and combined with the same period dates, the article analyze mainly the differences among the three states from its preparation, operation, function and impact aspects and deal with the military system of the Ming Dynasty, migration, defense policy, minority administration and policy, economic strategies.

全文：军屯,是明代西北军事屯田的缩影,具有代表性。处于明代军屯大格局中的河州、岷州、洮州三卫军屯,除具有明代军屯的共同特征外,由于地处汉族与其他民族交界之处,境内少数民族众多,因而又具有区别于其他地区军屯

唐代前期河西州县城城防研究

作者： 张向红   来源： 西北师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 河西州县城   唐代前期   城防  

描述： ch as the important town of the Silk Road, multi-ethnic coexistence and the border district administrative center. In order to ensure normal exchange between the East and the West, frequent contact among ethnicities, and effective administration in He-xi area, it was extremely essential to establish city defense. Therefore, the Tang government built the city defense system that was mainly military defense and based on social balance. Mainly included the screen protective system of Army, Shouzhuo, City, Town, Shu, etc., which had some focal point and very wide and located out of the cities; Three layers external protective system that was composed of a deep ditch to round every city, sheep and horses cities, city wall; Multiple structure system such Luo city(outer city), Zi city(inner city), fang(residential area), Shi(markets), and so on; Garrison inside cities and out of locality system; Feng, Yi and other information systems; General's office person of ability system; Warehouse reserve and social balance system. Because of the important geographical position strategic and the special social security problem, the He-xi Prefecture and county city defense had formed Trinity characteristic with the national defense and the security defense. The city defense soldiers had a hand in Tuntian to bring about He-xi area’s agricultural advance; A large number of people of city defense formed the consumer market, had promoted the prosperity of the commerce; The city defense ensured traffic and military assistance, made He-xi Prefecture and county cities become the rear base to administer Central Asia. However, the city defense had its limitation, such as impotent military might at times (it offered an opportunity of Tibetan expanded in north-west area), because of the condition between the country and the locality. It, to a certain extent, had influenced on the valid function of city defense.

全文：政府构建了以军防为主、社会平衡为基础的城防体系,主要包括城外军、守捉、城、镇、戍等广阔而有重点的屏卫体系;隍堑、羊马城、城墙三重外卫体系;罗城(外城)、子城(内城)、坊(居民区)、市(市场)等多重

厚皮甜瓜耗水规律与调亏灌溉效应研究

作者： 高慧娟   来源： 甘肃农业大学 年份： 2010 文献类型 ： 学位论文 关键词： 光合特性   产量   调亏灌溉   耗水规律   水分利用效率   甜瓜  

描述： conducted full irrigation (CK), mild regulated deficit irrigation and moderate regulated deficit irrigation with melon varieties of Ymdi and Yujinxiang in three growth stages including sowing to flowering time, flowering to fruit expanding stage and fruit expanding to picking time.

全文：提供理论依据。主要结果如下： (1)甜瓜耗水量随灌水量的增大而增大。银帝各水分亏缺处理的耗水量与对照之间差异显著。除在膨大-开花期轻度水分亏缺处理外,玉金香其它各水分亏缺处理的耗水量与对照存在显著差异

新疆加工番茄抗黄瓜花叶病毒转基因技术的研究

作者： 张瑜   来源： 石河子大学 年份： 2010 文献类型 ： 学位论文 关键词： RNA干扰   系统进化树   黄瓜花叶病毒  

描述： bution, one of the pathogenicity impaired crops. It has three genomic RNAs. So it is one of RNA virus model strains to investigate pathogenicity mechanism in host.

全文：技术拥有与传统的基因研究方法所不具备的优势,它为研究基因功能及植物基因表达调控提供了新途径,可通过有选择地抑制外源基因的表达,因此在病毒和病虫的防治方面展现了其独特之处。 本研究采用RT-PCR的方法

中国古代害虫观念与防治技术研究

作者： 龚光明   来源： 南京农业大学 年份： 2010 文献类型 ： 学位论文 关键词： 观念   防治技术   农作物害虫   中国古代  

描述： 中国古代以农立国,农业丰歉直接关乎社会稳定、人类幸福。因此,农业害虫一直受到关注,人们不断探索、总结其规律及应对措施。在生产实践中,害虫观念、防治技术在继承的基础上不断发展与更新。不同时期害虫观念的变化对防治政策的制定及防治技术的实施产生深远影响。 古代农业害虫以蝗、螟、好蚄及未知名害虫为主,次数依

全文：主要发生在夏、秋两季,但发生月份稍有不同。一年十二个月均有蝗灾和未知名虫灾,有三个月无螟灾、五个月无好妨灾。各虫灾爆发的最高月份均不同,但都在夏、秋季。虫灾频率除明清稍低于前代外,基本呈递增趋势；波及

小麦蓝矮病植原体β-1，4-内切葡聚糖酶基因的分离、序列分析与致病性测定

作者： 张珏   来源： 西北农林科技大学 年份： 2010 文献类型 ： 学位论文 关键词： 致病性   1   植物病毒表达载体   β   4   原核表达   小麦蓝矮病植原体   内切葡聚糖酶  

描述： Northwest China, this disease was transmitted by Psammotettix striatus in a distinct way.

全文：持久方式专化性传播。表现病症的叶片多为黄化,植株矮缩,叶片厚硬,造成减产,严重时全田发病绝收,极大威胁小麦产量。因此,小麦蓝矮病的研究和防治意义重大。β-1,4-内切葡聚糖酶(FrvX)是一类由真菌

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：农业生产与气候变化关系密切,农作物生长发育的好坏和产量的高低,除了决定于农作物本身的生物学特性和人们的经营措施外,很大程度上受到光、热、水、气等气候要素的支配。我国西北旱作农业区完全依赖自然降水,是

中国道教农业史——农业思想初探

作者： 赵文杰   来源： 山东大学 年份： 2010 文献类型 ： 学位论文 关键词： 农学   道家   农业   道教   思想  

描述： he civilization of agriculture of China has a long history.

全文：的重要性,以及从事农业生产的重要性。 经过隋唐五代的发展,道教完成了其内在化,从外丹修炼逐渐转向内丹证道,及至宋元明清时期,道教主要的著作多是内丹和伦理学说。然此时出现了全真道农业学者陈旉,陈旉以其

从出土简帛看思孟学派的“内圣外王”思想

作者： 谢耀亭   来源： 陕西师范大学 年份： 2010 文献类型 ： 学位论文 关键词： 内圣外王   先秦儒学   思孟学派   出土简帛  

描述： s text is mainly constituted by the following seven parts.

全文：展开论述,且由此上溯至思孟学派以前古代流行的人性论传统,藉此突显思孟学派的心性论特色。天人关系是思想理论产生的大背景,是以对天人关系的演变进行了相关的研究。 第四部分,从出土楚简看思孟学派的“外王