中国古代郡县地名避讳初探

避讳是我国古代一种非常重要的文化现象,郡县地名也必须避讳.郡县地名避讳按对象可以分为敬讳、忌讳和憎讳三大类.这三种类型又可以细分.郡县地名避讳一般采用更读、标"讳"、改称、代字、省阙和变体六种方法.     

唐山市曹妃甸生态城重盐碱地绿化探析

在参与完成唐山曹妃甸国际生态城花海景观工程施工建设的基础上,从曹妃甸地区特殊的气候、水、土等自然地理条件着手,根据绿化工程施工实践和思考,探讨生态城及周边区域大规模绿化应该重点考虑的几个问题,以期为北方滨海类似重盐碱地的绿化提供有益参考。     

Carriage of Clostridium difficile and Other Enteric Pathogens Among a 4‐H Avocational Cohort

Clostridium difficile (CD), Salmonella, Campylobacter and enterohemorrhagic Escherichia coli (EHEC) are major causes of morbidity in a variety of enteric diseases in humans and animals, but subclinical carriage in both is probably more common than are clinical cases. Little is known regarding the prevalence of these pathogens in animals raised for exhibit at Michigan county fairs or the frequency with which Michigan citizens raising these animals may have been subclinically colonized. To address these issues, 361 fecal specimens from 158 humans and 203 of their farm animals were cultured for CD, Salmonella and Campylobacter. Additionally, 50 people and their cattle were tested for EHEC. No EHEC, Salmonella or Campylobacter were detected. However, 16 specimens (4.4%) were positive for CD: 13 humans, two horses and one pig. None of the farm animal specimens submitted by any of the 13 CD‐positive humans were positive for CD. Strain characterization [toxinotype, pulsed‐field gel electrophoresis (PFGE)] demonstrated that the human CD isolates were similar to what has been reported previously in the general US population. We conclude that horses and farm animals (cattle, sheep, goats and swine) at 1–2 months before market weight showed no evidence of wide‐spread carriage of the common enteric pathogens, including the recently reported CD toxinotype V. These results provide no support to the hypothesis that 4‐H members or others visiting county fair animal husbandry projects in these counties may be at increased risk for acquisition of CD, Salmonella, Campylobacter or EHEC from animals.     

沿海平原南方型杨树造林方法初探

连续５年的造林工作实践，总结出了一套适应沿海平原地区的南方型杨树“一浸二近三深四法”的造林技术措施。     

共和县生态农业研究

根据共和县的气候、土地、水、社会资源优势和存在问题，提出了生态农业是个系统工程建设，生态农业模式就是可持续发展模式。     

湟中县草地生态环境现状与治理对策

湟中县属青海生态环境脆弱地区之一 ,通过分析其生态环境特征 ,针对存在的问题提出了建设、保护建议。     

土地质量指标在可持续土地利用管理评价中的应用研究

本文双联合国土地质量指标计划推荐的核心为指导，对河北省曲周的土地利用管理活动进行了可持续评价。评价结果表明：曲周的盐渍化治理取得了很大成绩，土壤肥力增加，土地质量总体上得到提高，农业生产稳定增长；同时，土壤污染问题开始显现，生物多样性受到威胁，这些问题现在虽然对土地利用的可持续性还没有形成致命影响，但如何继续发展下去，肯定对农业土地利用系统的可持续性构成威胁。     

福建松溪竹业开发和经济发展

本文对福建省松溪县竹笋加工现状、产值、生产规模以及在改进基础设施和护笋养竹方面取得的成绩进行了阐述。近年来松溪县竹笋加工企业发展快、起点高、规模大、成效好，值得学习借鉴。     

利用TM资料调查土地利用状况动态变化--以玛曲县为例

介绍了运用TM资料监测玛曲县土地利用动态变化的方法和结果。对1986年和2000年的TM影像的解译结果汇总看出，玛曲县的土地类型面积经过14年以后，发生了较大的变化。从草地面积变化可以看出，高覆盖度草地面积减少52km^2，中覆盖度草地面积减少149km^2，低覆盖度草地面积增加212km^2，草原退化严重。     

松材线虫病综合预防技术研究

对松林中的枯死木、流通领域的松木及其制品,以及树体内的活体松褐天牛肢体进行抽样和分离监测,研究松线材虫病的综合监测预警技术体系.并且将外地调入和本地调出的森林植物及其产品全面实施动态源头管理,使所有监测对象都在预防控制管理渠道之中,形成操作性强和简便实用的长效管理机制.