李连捷教授在南山

李连捷教授作为 1 973～ 1 978年北京农业大学专家工作组最年长的一位 ,深入湘桂交界的南岭西部的山地 ,为引种奶牛、肉牛建设山地牧场进行草地和土壤调查。当时生活和交通条件等均很差 ,近 70岁高龄的李老跋山涉水 ,步行到有关山地、坪地进行调查 ,并修建梯田 ,引种牧草 ,为开发南山牧场进行科学规划。特别是对南山的花岗岩风化土壤的保护和山地沼泽的保护等生态保护和合理用肥提出了关键性建议 ,保证了南山牧场的顺利发展 ,南山的人民永远不会忘记.     

Effects of Bioflocs on Artemia Growth and Water Quality

正1 Introduction Bioflocs is a heterogeneous mixture of the microorganisms,particles,organic polymers and dead cells,etc.(Hargreaves,2006).Among which,heterotrophic bacteria convert efficiently the ammonia nitrogen into the bacterial protein,which provides the supplementary feed for culture animals and reduces the nitrogen level in the culture system(De Schryver et al,2008).In the closed aquaculture system,the growth of     

加强矿业供给侧结构性改革的初步思考

当前我国正处经济增速减缓的新常态,供给侧结构性改革应运而生。我国乃至世界的矿业更是处于发展的严冬之季,产能严重过剩,大宗商品价格持续走低。在当前形势下,我们要用新常态眼光看待矿业未来发展之路,因地制宜,着力加强供给侧改革,刻不容缓。     

鲁中北寿光机械林场遗址的环境与盐业生产活动——炭化植物遗存分析

渤海南岸的莱州湾滩地是中国古代重要的产盐区, 分布有众多盐业遗址。其中, 山东寿光机械林场遗址是一处东周和宋元时期的盐业遗址, 分布有盐灶、盐井和灰坑等遗迹单位。炭化遗存分析结果显示, 遗址中农作物种子的数量较少, 杂草的种类及数量较为丰富, 以藜科、菊科、禾本科、茨藻科为主, 并且发现了数量较多的草本植物茎秆, 植物比例显示出偏向自然生长的状态, 可能与放荒发展草荡以供燃料有关。寿光机械林场在东周时期处于滨海盐生草甸植被分布区, 气候较为温和干旱, 至宋元时期湿地植物增加。土壤盐碱化的环境特征并不适合发展农业, 遗址多为煮盐作坊区, 与生活区间可能隔有一定距离, 或与官府对盐业的管控有关。先民在煮盐时就地取材, 利用周边杂草作为燃料, 煮盐集中在秋末、冬季, 遗址可能存在季节性利用的特征。有关盐业遗址的炭化植物遗存的研究相对较少, 寿光机械林场遗址炭化遗存分析结果可以为研究煮盐燃料及莱州湾滩地盐业作坊区周边的环境与植物类型提供一些线索。

     

Ethnic coexistence in a pluralistic campus environment

In Malaysia, ethnic segregation seems to have grown more and more pronounced at all levels of education, which may have in the main contributed to increasing occupational segregation by ethnicity when the graduates left to join the job market. Such trends may be disturbing given the effort the country has put in to promote interethnic understanding and reduce interethnic economic disparity since 1970. By critically investigating the dynamics of ethnic coexistence in the microcosm of the university campus environment, this paper provides statistical evidence to show how far the country has progressed in terms of ethnic relations since the watershed events of May 13, 1969; to what extent Malaysian multiethnic society is different now compared to the unmistakable racial “corporateness” and interethnic “separateness” that Furnivall observed in his classic study of 1948; and in what ways ethnic relations have been reshaped by three decades of affirmative action policies and the form of ethnic democracy adapted for this unique society.

安徽矿业循环经济范式初探

安徽是矿产资源大省,要把资源优势转化经济优势,必须运用循环经济的新范式,结合安徽实际,根据科学发展观的要求,实施矿业可持续发展战略。本文还提出了关于用循环经济的理念来促进安徽矿业的几点政策建议。     

云南矿业支柱产业建设的重点、难点及对策研究

云南矿业发展现状尤其是磷化工和有色金属等优势资源的调研和分析结果表明，矿业已成为云南工业的主体产业群体，影响云南矿业发展的难点主要是企业规模偏小，产品结构不合理，企业整体经济效益下降，国有企业困难面大，地质勘探投入少，矿山建设落后等，并据此讨论了矿业作为云南省支柱产业发展的思路和重点，提出相应的对策和建议。     

创新科技，强化能力，精益管理，努力建设一流钻探队伍——中核地质钻探“十一五”工作回顾及“十二五”工作设想

从钻探生产、钻探科研、钻探工程管理、钻探能力建设以及钻探队伍建设等方面对中核地质钻探在＂十一五＂期间所取得的成绩和进展作了全面的回顾总结,提出了＂加强人才建设、推进科技创新、加强能力建设、推行精益管理＂的＂十二五＂工作设想。     

煤层气地面开发的外部效应

煤层气是一种新能源和优质化工原料,地面开发可以节能减排,降低瓦斯灾害,具有极强的正外部性。但煤层气与煤炭共生在一起,开发一种会影响另一种。通过分析煤层气地面开发现状,探讨了它在地质勘探、矿井地质、矿井通风、综合开采、煤炭气化和环境保护等方面存在的负外部性。外部性影响和制约着煤层气产业的健康发展。正外部性可以通过国家补贴、税收和费用减免等措施来强化;负外部性则可以通过淘汰落后或不合理的产能技术,创新开发工艺,以及提高采收率等来减少,并通过明晰产权和联合开发,使部分负外部性转化为内部性,达到共赢之效果。     

Would different methodologies for assessing carbon leakage exposure lead to different risk levels? A case study of the Brazilian industry

Energy-intensive industries play an important role in low-carbon development, being particularly exposed to climate policies. Concern over possible carbon leakage in this sector poses a major challenge for designing effective carbon pricing instruments (CPI). Different methodologies for assessing carbon leakage exposure are currently used by different jurisdictions, each of them based on different approaches and indicators. This paper aims to analyse the extent to which the use of different methodologies leads to different results in terms of exposure to the risk of carbon leakage, using the Brazilian industry sector as a case study. Results indicate that carbon leakage exposure is an expected outcome of eventual CPI implementation in Brazilian industry. However, results vary according to the chosen methodology, so the definition of the criteria is paramount for assessing sectoral exposure to the risk of carbon leakage.

Key policy insights

• Despite increasing discussion about the implementation of carbon pricing on the Brazilian industrial sector, the evaluation of carbon leakage risks is still neglected.

• Assessments of the risk of carbon leakage are directly related to the indicators and criteria used by each methodology. Thus, a given subsector may present different levels of exposure to carbon leakage depending on the methodological choice.

• More than a purely technical discussion, the methodological definition of carbon leakage risk is a political discussion – it can be well-conducted, leading to the success of a CPI, or even sabotaged, by implicitly subsidizing energy-intensive industries.