以土壤螨为指标检测EM堆肥生态效应的研究

1997年对河北曲周农大实验站不同施肥条件下农田中的土壤螨进行调查 ,共获土壤螨标本 3776个 ,分属于 4个目。通过对 3种不同施肥区 (EM堆肥区、传统堆肥区、化肥区 )土壤螨群落丰富度指数、多样性指数分析表明 ,施用EM堆肥区土壤螨数量多 ,物种丰富 ,群落稳定性强。均匀度指数表明EM堆肥区土壤螨分布均匀 ,季节性波动平缓。EM堆肥区 1 0～ 2 0cm土层土壤螨数量比传统堆肥区、化肥区增多 ,EM堆肥区土壤螨垂直分布下限下移 ,EM堆肥区土壤有机层加深。     

长白人参新品系植株形态和根部解剖构造的初步研究

对长白人参新品系开头和根部的横切构造进行研究，结果表明：该品系比“吉参一号”在茎粗、茎高上有显著的生长优势（Ｐ〈０．０１），其它性状差异不显著。     

澜沧江自然保护区周边社区林业现状及发展对策

应用农村快速评估方法,对自然保护区内及周边土地利用、社区林业现状、资源传统利用与管理方式、保护区现行管理体系及与周边社区的关系作了全面系统地调查.结果显示:保护区周边群众对森林资源的依赖性高、利用方式多样,但利用率低、资源浪费和消耗严重,周边社区参与保护区管理的能力低,随保护力度加大和经济技术的发展,各民族人民在建房用材上对森林资源的依赖呈现逐步降低的趋势.引入社区林业理论,提出改进保护区管理的方法,提高周边社区参与保护区管理的意识,将保护区管理与乡村群众的经济条件改善结合起来是实现保护区有效管理的途径之一.     

考虑地基刚度的底部两层框架砖房自振周期的计算

提出了一个考虑地基刚度并结合下柔上刚的结构特征，把一栋建筑物作为一个整体建立相应的力学模型，最后得到一个计算此类结构自振周期的实用计算方法。     

结构变革与农业增长方式的转变

在分析了结构变革与农业增长方式转变关系的基础上，提出了结构优化的经济学原理，并探讨了我国农业经济结构调整的具体方向。     

Making a living on Flores,Indonesia: Why understanding surplus distribution is crucial to economic development

Donors and aid agencies are now looking to strategies of pro‐poor economic growth to raise living standards in developing countries. I critically examine how particular conceptualisations of economy and economic development shape the broader context within which pro‐poor growth approaches are implemented by governments and development agencies. While pro‐poor growth may expand a national economy, surplus will be distributed in a community and among individuals according to culturally specific logics. To exemplify this point I discuss the community economy of Bomolo on the remote, rural island of Flores, Indonesia. The Ngadha people of Bomolo are identified by the Indonesian state, religious organisations and development agencies as lacking and in need of economic development. Yet in Bomolo, gambling, although illegal and antithetical to development, is fantastically popular, and large amounts of cash surplus are spent on this popular pastime. I argue for more attention to the issue of surplus – the outcome of pro‐poor growth. In particular, I propose that surplus distribution is a crucial yet underdeveloped component of the growth equation.     

汉语兼语句和英语SVOC句型互译时的句式对应

汉语兼语句[（N1）＋V1＋N2＋V2]或英语SVOC句型的构成主要取决于动词V1或V的意义。通过对兼语句和SVOC句型互译实例的对比分析，探讨兼语句和SVOC句型进行英汉互译时的句式对应，以期加深对英汉中的这两种语言现象的认识。     

用技术创新扩散理论分析可持续发展实验区建设

综合技术创新扩散和组织管理理论，以国家可持续发展实验区的发展建设和传播扩散过程为研究对象，构建了可持续发展实验区扩散过程模型以及国家可持续发展实验区扩散过程分析的理论框架，并利用系统模型实证分析了可持续发展实验区在我国发展和扩散现状，最后从技术创新传播学的角度为实验区发展建设提出了相关的政策建议。     

Community structure and carbon and nitrogen storage of sagebrush desert under grazing exclusion in Northwest China

Overgrazing is regarded as one of the key factors of vegetation and soil degradation in the arid and semi-arid regions of Northwest China.Grazing exclusion(GE)is one of the most common pathways used to restore degraded grasslands and to improve their ecosystem services.Nevertheless,there are still significant controversies concerning GE’s effects on grassland diversity as well as carbon(C)and nitrogen(N)storage.It remains poorly understood in the arid desert regions,whilst being essential for the sustainable use of grassland resources.To assess the effects of GE on community characteristics and C and N storage of desert plant community in the arid desert regions,we investigated the community structure and plant biomass,as well as C and N storage of plants and soil(0-100 cm depth)in short-term GE(three years)plots and adjacent long-term freely grazing(FG)plots in the areas of sagebrush desert in Northwest China,which are important both for spring-autumn seasonal pasture and for ecological conservation.Our findings indicated that GE was beneficial to the average height,coverage and aboveground biomass(including stems,leaves and inflorescences,and litter)of desert plant community,to the species richness and importance values of subshrubs and perennial herbs,and to the biomass C and N storage of aboveground parts(P<0.05).However,GE was not beneficial to the importance values of annual herbs,root/shoot ratio and total N concentration in the 0-5 and 5-10 cm soil layers(P<0.05).Additionally,the plant density,belowground biomass,and soil organic C concentration and C storage in the 0-100 cm soil layer could not be significantly changed by short-term GE(three years).The results suggest that,although GE was not beneficial for C sequestration in the sagebrush desert ecosystem,it is an effective strategy for improving productivity,diversity,and C and N storage of plants.As a result,GE can be used to rehabilitate degraded grasslands in the arid desert regions of Northwest China.     

群体遗传结构的理解

一个植物种群体的空间分布大致可划分为两类 :离散分布与连续分布。然而隐藏在这种表观物理分布内部的遗传变异是十分复杂的。这种变异是如何分布的呢 ?这种分布又是如何维持的呢 ?因此 ,认识一个种的群体遗传结构有助于我们理解该种的进化过程 ,并提供为遗传资源保护做出决策的重要信息。本文对三大经典遗传结构模型 (岛屿模型、步石模型及距离隔离模型 )与渐变群理论及它们的异体和发展进行了详细的分析和评述。目前获得的许多不同类型的遗传标记使这些理论的应用得到不同程度的实现 ,但由于这些理论结论涉及到许多假设 ,在实际应用时应十分慎重。作者认为许多已建立的适合于动物群体遗传结构理论不能简单地直接应用于植物群体上 ,今后一个重要的研究内容就是要建立适合于植物群体的遗传结构理论