广西合山市煤矿废弃地植被生态恢复与重建研究

运用生态学的基本原理和方法,对广西合山市煤矿废弃地的植被现状和废弃地立地条件进行调查表明:矿区废弃地自然定居植物共87种,隶属于39科61属;合山废弃地主要分为煤矿生产废弃地、煤场和煤矸石堆场、特殊河道及矿山路段建设等类型。在此基础上,确定了在合山煤矿废弃地进行植被生态恢复的原则;并结合合山市实际情况,围绕国家矿山生态公园的建设,提出不同的植被恢复配置模式、生态恢复措施、生态管理等建议,以期为合山的建设和发展提供参考。     

露天开采矿山植被恢复策略与方法

从水土保持与生态恢复、生态恢复植被基础、生境条件、规划设计等方面论述了露天开采矿山自然生态环境重建工程技术的原则基础,即生境与工程地质条件结合、岩石边坡环境与植生基础融合和植被物种选择与配置的抗性原则;对工程技术方法进行了分类（即排水方法、格子方法、防风和植生土袋方法）并概括了各方法的特点和工程技术要点,重点描述了基于生态思想的水土保持与生物多样性的协调、人工土壤-重建基础和重视露采矿山生态环境调查相结合的植被重建方法.     

土壤—微生物—植被系统与金属矿山生态恢复——以大红山铁矿生态恢复为例

金属矿产开采对矿山生态环境造成严重破坏,按原有模式恢复受破坏的矿山生态环境,存在恢复效果不理想、投资不经济和建立的生态系统不稳定等问题.为了寻求高效、经济、快速的恢复模式,本文探讨了构建"土壤-微生物-植被有机系统"恢复受破坏的金属矿山生态环境的生态恢复技术,内容包括基质改良、优良植物选择和优良微生物选择.并以大红山铁矿生态恢复为例进行说明.     

森林生态文化建设框架内退化生态系统植被恢复与重建的研究

植被恢复与重建隶属于森林生态物质文化范畴,成功与否除了取决于植被改造的技术支撑,还需要森林生态精神文化和制度文化层面上文化与社会的支持。文章明确了森林生态文化体系、退化生态系统植被恢复的内涵,确立了森林生态文化建设框架内的退化生态系统植被恢复与重建的理论依据和原则,以沈溪新城退化生态系统植被恢复与重建为例,分别从森林生态物质文化、精神文化、制度文化三个层面阐述可持续发展植被恢复与重建的途径。     

桂西北石漠化地区不同植被恢复模式土壤性状的初步研究

为了深入了解桂西北地区石漠化治理和土壤生态恢复的现状,作者对广西宜州、环江、平果等地进行了实地调查,并从海拔高度、恢复年限、植被类型等角度,对桂西北石漠化地区封山育林、吊丝竹、任豆等不同植被恢复模式样地的土壤水分、容重、孔隙度及土壤有机质含量等进行了比较分析,试图了解不同植被恢复模式对石漠化地区生态恢复过程中土壤肥力的影响,结果表明,与豆科植物混交的植被恢复模式,其土壤有机质含量较高,其他相关的理化分析指标也较好,因此,可以将之作为石漠化土地植被恢复的优化模式。     

高岭土矿洗矿沙山绿化技术试验研究

以龙岩市东宫下高岭土矿洗矿沙山为对象,遵循植被演替的自然规律,以草先行,进行绿化技术的研究。经过4a试验表明,类芦是绿化高岭土矿洗矿沙山的首选先锋植物,绿化技术简便、投资省、见效快,生态效果明显,可以在同类矿山尾矿沙废弃地的植被恢复与重建中推广。     

不同植被恢复模式对石漠化地区土壤多酚氧化酶的影响

多酚氧化酶是一种重要的土壤酶,对土壤环境的变化比较敏感,可作为土壤肥力变化和生态恢复的监测指标。为了深入了解桂西北石漠化地区生态恢复的现状,作者对广西宜州、平果等地进行了实地调查和取样,并从不同植被恢复的角度,对桂西北石漠化地区封山育林、吊丝竹(D.minor(McClure) Chia et H.L.Fung)、任豆(Zenia insignis Chun)等不同植被恢复模式样地的土壤多酚氧化酶及其与土壤有机质、全N、全P、有效N、有效P的相关性等方面进行了比较分析,试图了解不同植被恢复模式对石漠化地区生态恢复过程中土壤多酚氧化酶活性的影响,结果表明,以豆科植物为优势种或与豆科植物混交的植被恢复模式,其土壤多酚氧化酶活性较高,其他相关的土壤肥力测试指标也较高,因此,可以将之作为石漠化土地植被恢复的优化模式。     

“环境生态学”在资源勘查工程专业教学中的实践与思考

对矿山生态环境进行恢复是新时代赋予资源勘查工程专业的新任务,而对"环境生态学"课程的学习,可让学生掌握与矿山生态恢复相关的理论知识。本文分析了资源勘查工程专业在矿山生态恢复领域的优势,以及资源勘查工程专业学习"环境生态学"的重要性,并对教学过程中取得的一些经验和体会进行了总结,以期让"环境生态学"教学内容和方法更适合资源勘查工程专业发展的需要。     

香根草对稀土矿废弃地土壤环境影响分析——以广东平远稀土矿为例

矿区废弃矿地面临的主要生态学问题是表土层破坏,选取优良的先锋物种进行植被恢复对矿废弃地表层土修复和加快生态演替起着关键作用.本文以梅州市平远县仁居稀土矿为例,调查香根草作为先锋植物在稀土矿废弃地生态演替情况以及实验分析得出不同植物群落下的土壤侵蚀模数和土壤理化性质,通过实地调查和实验得出香根草在稀土矿废弃地的植被恢复过程中加快了生态演替速度,具有护坡、固土、涵养水源、改善土壤理化性质的作用,但氮磷钾的含量较低,肥力较差.讨论得出增施肥料,培育壮苗是香根草植被修复的关键措施,利用多物种相结合方式加快稀土矿废弃地植被恢复,促进生态演替.     

高岭土矿洗矿沙山绿化技术试验研究

以龙岩市东宫下高岭土矿洗矿沙山为对象，遵循植被演替的自然规律，以草先行，进行绿化技术的研究。经过4a试验表明，类芦是绿化高岭土矿洗矿沙山的首选先锋植物，绿化技术简便、投资省、见效快，生态效果明显，可以在同类矿山尾矿沙废弃地的植被恢复与重建中推广。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.