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In this study, the quantity, species and distribution characteristics of oxytetracycline resistant entophytic bacteria in wheat rhizosphere, root, stem, leaves and seeds were researched by isolation and cultivation methods.

研究通过培养的方法研究了小麦根际土壤、根、茎、叶各部位的土霉素抗性内生菌数量、种类和分布特征。

Research on the characteristics of ammonium, nitrate and organic nitrogen utilization by ericoid mycorrhizal fungi and impacts on growth in vitro of Rhododendron fortunei was carried out to determine the suitable nitrogen sources in ericoid mycorrhizal fungal cultivation and test the effects of ERM on host plant growth in substrate with different nitrogen sources.

研究从云锦杜鹃根系分离的欧石南菌根(eriocoid mycorrhiza， ERM)真菌对铵态氮、硝态氮和无机氮吸收特性及其接种效应，检测ERM菌株吸收利用不同氮源能力及筛选培养菌株适宜的氮源，并分析ERM对寄主植物氮源吸收的影响。

The effects of cultivation conditions such as temperature, intial pH, and broth volume on the bioacitivities of the biotransformation products of EGB by Hericium erinaceus in shaking flask were further investigated.

在前期优化培养基的基础上，本实验比较了摇瓶的温度、pH、装液量和发酵罐培养的通气量、转速和培养时间等不同培养条件对猴头菌转化EGB生物活性的影响。

The soil erodibilities are compared and appraised for the majority of the soil types in Ningxia. The method published by D. W. Fryrear et al is adopted to calculate erodible fractions for the soils in Ningxia. The erodibilities of main soil types are compared and analyzed. Spatial distribution of soil erodibilities in the region can be perceived on the Map of Ningxia Soil Erodibility. The map is based on the digitized map of soil types of the all region by means of the geographical information system of Region Manager. Evaluation results show that erodible soils occupy a large portion of the total area of the region.(3) The third task is evaluation of effects of human activities for farming on soil erodibility. Tillage and cultivation can alter soil properties. The paper, based on the discussion on the characteristics of farmland suffering wind erosion in the region, analyzes the contents and intensities of farming disturbing surface soil. Emphasis is paid on the effect of farming on erodibilities of each type of soil.

W Fryrear等人的计算土壤可蚀部分含量的方程，此方程的自变量包括土壤有机质、碳酸钙、沙粒含量、沙粘比，计算了宁夏主要土壤类型表层的可蚀含量，进而比较它们的可蚀性，并以宁夏土壤分布图为底图用地理信息系统建立了宁夏土壤风蚀数据库，完成了宁夏土壤可蚀性图，评价结果显示宁夏地区主要的土壤类型较容易遭受风蚀；（3）农业经营对土壤风蚀的影响及其评价，在分析宁夏农业土壤遭受风蚀特征的基础上，首先讨论了农业活动对土壤理化性质的干扰，评价主要耕作栽培措施对土壤风蚀的影响，选取粗糙度、表面结皮、可蚀颗粒含量、留茬和有效时间为指标，用打分方法作了评价。

The historical process of transition between cultivation and pasture animal husbandry and its ecological impact has been analyzed by demonstration to explore the large-scale laws.(2). The driving process has been analyzed and behavior mechanism of local people was also construed.(3) The new interpretation of desertification causes has been made to search root of estrepement, overgrazing and excessive firewood gathering.(4) The comparison and selection have been made to explore new changing direction of integrated land desertification control strategy.

主要进行了：①农、牧业变化的历史轨迹与生态环境演变的实证研究，从大的历史尺度寻求农、牧业变化与沙漠化之间的互动关系；②农、牧业选择变化的驱动过程研究，从较短的时间尺度进行高分辨率的过程跟踪与解析，重点分析农牧民的行为机制；③农、牧业选择变化对沙漠化过程的动因解析研究，重点解析&滥垦、滥牧、滥樵&产生的深层次根源，为沙漠化防治战略的制定提供理论依据；④生态建设策略的比较与转型方向的研究。

ABSTRACT This dissertation, based on the theories of geography, ecology, economics, sociology and environmental sciences, has analyzed the impact of transition between cultivation and pasture animal husbandry on the mechanism of desertification in Kerqin Sandy Region, of which behavior mechanism of local people was emphasized. The changing direction of integrated land desertification control strategy in semi-arid regions was discussed after having explored the primary reasons of estrepement, overgrazing and excessive firewood gathering. Followings are the main research works having been done.

本文选取科尔沁沙地作为研究区域，以两种最主要的土地利用方式、也是两种最主要的生产方式——农、牧业作为研究对象，依据地理学、生态学、经济学、社会学与环境科学的基本理论与方法，基于现有研究资料的系统整合，结合野外调查的结果，从更加综合的角度，来研究农、牧业选择变化对沙漠化过程的影响机理，从农、牧业选择变化的角度来揭示&滥垦、滥牧、滥樵&的本质，进而寻求中国北方半干旱地区生态环境综合整治的对策。

The paper discusses and analyzes the historical background and recent advances in the applied ethnobotanical research, with an emphasis on the ecological ideas and cultural traditions inherent in the traditional knowledge of forest and forest plant exploitation, the origin of both medicinal plants and plant cultivation as crops, and the history of their applications.

该文追溯了民族植物学的历史渊源，介绍了民族植物学的应用研究现状，森林与植物利用传统知识中隐含的生态学思想，森林与植物利用传统知识中的文化渊源，药用植物和栽培植物的起源及其应用历程研究。

Coptis teeta is an economic medicinal plant which is well protected in Yunnan. Based on ethnobotanical theory, combined with field study, community survey, and literature study, we investigated the history of cultivation and traditional management of C.

运用民族植物学原理，采用野外面上调查、定点社区调查和文献研究相结合的方法，调查了云南西北部高黎贡山地区傈僳族对云南黄连的混农林种植历史和方式，总结了他们认知、利用、管理和保护这一名贵药用植物的传统知识和经验及其与生物多样性保护的关系。

According to the logos of Socrates, Plato, Aristotle, and Hegel and the advanced teaching theory of Humboldt, Newman, Eliot, Huxley, Hutchins, and Kerr, along with the transformation logic of entrepreneurship education from perceptual stage of cognition to knowability and from knowability to rationality, the"essential research points"of the logos of entrepreneurship education are as the followings:"spiritualism paradigm"of subject arousal as inner core,"epistemology structure"of subject cultivation as intermediary, and"ethological requirement"of subject realization as object. These three elements constitute the main stream of logos of entrepreneurship education.

根据苏格拉底、柏拉图、亚里士多德、黑格尔的理念论和洪堡、纽曼、艾略特、赫胥黎、赫钦斯、克尔的高等教育理念，沿着感性的创业教育→知性的创业教育→理性的创业教育的逻辑，本研究将创业教育理念体系的&研究纲领&设定为：以激发主体性的&精神学范式&为内核，以主体性培养的&知识论结构&为中介，以主体性实现的&行为学要求&为目标，它们共同构成创业教育理念体系的主干。

Conditions of Shennongjia climatic and the soil environment are very suitable for large-scale cultivation of pollution-free Eucommia.

神农架的气候条件及土壤环境非常适合大规模的无公害杜仲种植。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。