清代新疆晋商初探

有清以来广大晋帮商人经商新疆,不仅带来了边疆各族人民的生活必需品,丰富了边疆人民的经济文化生活,而且在开发新疆、反对外来侵略等方面都做出了重要贡献.     

营造和谐氛围,培养规范行为——探索外来务工人员子女生活行为习惯的培养方法

文章分析了外来务工人员子女存在的一些不良生活习惯,提出班主任应当调查研究学生的家庭环境和个人的现象问题,建立良好的班级环境,营造和谐优美的班级氛围,从而培养学生良好的规范行为.     

外来物种入侵

近１０余年来，由外来物种入侵本土而造成的生态事件，已引起世界各国的广泛关注。１９９９年２月，美国总统克林顿发表声明说“非本土植物和动物排挤本土物种，破坏生态平衡，给经济造成了严重损害，甚至还改变了我们的地貌。”据此，克林顿责成美国农业部、商务部和内政部在１８个月内制定一份解决这一问题的详细计划，并要求国会向该项行动的预算增拨２９００万美元的资金。严重的生态后果应该说，生物入侵也像物种灭绝一样是一个自然的过程。比如，有一种原产美洲、后来落户英伦三岛的野鸭，每年总要沿着一定线路游徙到西班牙，而它们到…     

中华青鳉纳帕海种群性状描述及与模式标本产地种群比较

濒危鱼类中华青鳉(Oryzias sinensis)种群因食蚊鱼(Gambusia affinis)的广泛入侵而严重下降,它的任何新种群被发现均具有重要意义。云南国际重要湿地纳帕海中华青鳉种群2016年6月13~17日被首次发现,由于该地为中华青鳉已知海拔最高(约3 260 m)的栖息区域,该地种群具有特殊的保护生物学研究价值。为确定其是否为中华青鳉物种及其性状是否发生区域性特化,对该种群进行了分类形态的检视及描述;并将之与模式标本产地种群的可数及可量性状差异进行了比较。分析发现两种群在可数性状基本相似,而在部分可量形态性状上出现统计意义上的显著差异。进一步利用多元统计分析方法研究显示两种群形态性状重叠明显,揭示它们在分类性状上的差异可能是种内不同地理种群适应不同栖息生境所产生分化差异所致,可以确认纳帕海种群为中华青鳉地理种群之一;而形态形状的差异是否暗示纳帕海种群已经发生了适应高原高寒环境的变异则尚待分子遗传学方面的进一步研究。     

林业有害生物防治的防治方法及应用

本文作者在自己多年的工作实践中，进行了回顾性的分析，新型农药在防治株业有害生物中起到了关键性的作用。新型农药是化学、生物学、医学、环境、生态等多学科相互渗透的结果，按其来源和性质分为生物农药、生物源农药、光活化杀虫剂、仿生农药和特异性杀虫利。因其具备高效性、安全性和经济性的特点，在林业有害生物防治中被广泛的使用。该文对此做了概述。     

部分土农药植物在林业有害生物防治中的应用

本文简要介绍了10种土农药植物在黑龙江林业有害生物防治实践中的具体应用，其对于合理开发本地丰富的防病治虫的土农药植物资源防治林业有害生物并达到治标又治本的目的有积极意义。     

外来物种比本地物种具有更大的遗传变异性

据英国Nature，2004，431：177报道，科学家发现，入侵物种比本地物种具有更大的遗传变异性。有可能不存在种群数量瓶颈，从而解开了入侵生物学中的遗传悖论。     

浅谈中央中央森林生态效益补偿基金工程区林业有害生物的监测预报

做好中央中央森林生态效益补偿基金工程区林业有害生物监测预报工作,要实施管护队与林业有害生物监测点“合二为一”,建立监测与防治专业队伍,加强监测软件建设,树立森林健康监测理念,促进森林资源的可持续发展。     

外来务工人口子女家庭教育调查报告——以对杭州市下城区XX小学的调查为例

通过对杭州市下城区XX小学四年级全体流动儿童家长的调查及对部分外来务工人口子女的家访，对外来务工人口子女家庭教育的现状进行了调研。反映了外来务工人口子女家庭教育的一些现状，指出了存在的问题，提出了相应的对策。     

A new mechanism of invader success： Exotic plant inhibits natural vegetation restoration by changing soil microbe community

Since the 1950s of the last century, the exotic plant, Eupatorium adenophorum, has spread rapidly across southwest China, damaging native ecosystems and causing great economic losses. We examined the pH, N, P, K, and organic matter concentrations, and the bacterial community character (by Biolog EcoPlateTM) in soils from sites heavily and lightly invaded by this exotic species. Also, soil from the lightly invaded site was treated with a water extract of E.adenophorum roots to examine the effect of the plant on soil properties. We grew three plant species, one native and two exotic, in pot experiment using soil from heavily invaded site to examine the effects of the soil on these plants growth. The soil analysis demonstrated that the pH, organic matter, total N, total P and total K in soils from the heavily invaded site were only slightly different from those of the lightly invaded site, but concentrations of NH4^ , NO3^- and available P and K in the heavily invaded site were greater than those in the lightly invaded site. The catabolic activity of soil bacterial community in the heavily invaded site was different from that in the lightly invaded site. The catabolic activity of bacterial community in soils treated by the water extract of E.adenophorum roots changed and became similar to that in soils from the heavily invaded site. The pot experiment showed that the exotic plants growth in heavily invaded soil were not different from in lightly invaded soil; however, the native plant biomass decreased dramatically when grown in soil from the heavily invaded site as compared to soil from the lightly invaded site; and the same phenomenon was found when any potential allelopathic effects by E. adenophorum were eliminated by added activated carbon to those soils. Difference in soil nutrient availability and allelopathy could not explain this phenomenon of the native plant in the soils from the heavily and lightly invaded sites. Changes observed in the soil bacterial community were obviously related to native plant growth in those tow soils. Those results suggest that changing soil microbial community may be an important part of E. adenophorum invasion process. Since the soil microbial community serves as bridge in connection of exotic and natural plants, the exotic plant could inhibit the natural plant growth and reproduction by changing the soil microbial community in invaded site.