关于造林的论文

1 关君蔚开展山区生产工作的几点体会中国农报半月刊，1953（12）2 关君蔚山地利用和农林牧业的划分林业科学，1954（2）3 关君蔚关于石质山地编制立地条件类型表及造林类型工作几点意见编制立地条件类型表及设计造林类型林业部造林设计局编，北京：中国林业出版社，4 关君蔚等大地园林化规划设计北京：中国林业出版社，5 关君蔚主编水土保持学北京：农业出版社，6 关君蔚等甘肃省黄土丘陵地区水土保持林种的研究林业科学，1962（4）7 关君蔚水土保持原理北京：中国林业出版社，8 关君蔚四千年前“巴比伦文明毁灭的悲剧”不允许在二十世纪的新中国重演北京林学院学报，1979；中国林业，1984（1）9 关君蔚石洪的运动规律及其防治途径的研究北京林学院学报，10 关君蔚关于我国热带资源开发在水土保持方面的几个问题云南热带作物研究所，热带作物科技，1979（3）11 关君蔚青海省东部山区防护林体系建设的几点体会青海农林科技，1979（3）12 关君蔚等发展生物能源是实现农业现代化的关键中国水土保持，1981（1）13 关君蔚等发展燃料林是实现农业现代化的关键人民日报，1981年1月15日14 关君蔚前事不忘后事之师—从442次列车失事看水土保持科学的重要性水土保持通报，1982（2）15 关君蔚长江的洪灾与森林森林与水灾北京：中国林业出版社，16 关君蔚山区建设和水土保持四川林业科技，1983（2）17 关君蔚泥石流预报的研究北京林学院学报，1984（2）18 关君蔚中国西南的水土保持问题喜马拉雅—兴都库什开发治理国际会议论文集，19 关君蔚等“三北”防护林体系建设工程中国百科年鉴北京·上海：中国大百科出版社，20 关君蔚等关于农村林业在中国几个问题的探讨国际农村学术会议论文集，21 关君蔚等参加大兴岭灾区恢复生产重建家园考察的几点体会和建议大兴安岭特大火灾恢复森林资源22 关君蔚中国水土保持类型的特点的研究第四次国际泥沙学术论文集，23 关君蔚关于“生态林业工程”项目的补充说明和建议中国林业，1990（2）24 关君蔚论长江流域防护林体系建设的迫切性中国林业报，1990年7月31日和生态环境考察报告汇编北京：中国林业出版社，25 关君蔚饮水思源中国林业报，1990年8月31日26 关君蔚中国的“绿色革命”中国林业，1990（9）

每当我坐在窗明几净的教室里，漫步在水清镜明的湖畔旁，飞驰在绿草如荫的足球场时，我都会感到一种惬意。但一个潜伏在我们身边很久的危机正在慢慢爆发，也许有一天这美丽的景物会离我们远去。这一切都是人类一手造成的。天堂大门的钥匙和地狱大门的钥匙都捏在人类自己手中。我们中学生应该自觉履行保护环境的责任，提高环保意识，增强法制观念，落实环保行动。做“文明小卫士”。我们的地球是一个美丽无比的星球。但水土流失、沙漠化仍不断困扰着人类。正疯狂地侵吞着人们赖以生存的土地。据有关资料统计，地球上的沙漠、荒地正以每年2700万公倾的速度扩展，我国沙化的土地也正以每年1560平方公里的面积延伸。目前，我国已有128万平方公里的土地沙化，而潜在沙化的土地差不多也有15万平方公里。荒漠化已成为危害全球环境最严重的问题。我曾看到一个寓意很深的漫画，画面上两辆汽车一前一后行驶着，前面一辆车上的人敲锣打鼓，还用红纸写道：报喜，化工厂增产，产值3万元。后一辆车上的人愁眉苦脸，一张纸上写着：报忧，因化工厂污染，粮食减产30万斤，附近居民身体严重受损，周边几条河流无法使用，法院判其限期整改并处罚金。孰喜孰忧，显而易见。所有这些，都是大自然向我们发出的警告，它在提醒我们不要忘了大自然的严厉惩罚和那些惨痛的教训。这也就提示我们以后一定要保护环境。环境污染会给我们的身心带来损害。为了保护我们的健康，就需要我们的社会提高和加强对环境保护的认识。地球是我们的母亲啊，我们不该将大量的污水排到它的血管里，将大量的垃圾埋在它的肉体中。地球不是垃圾场，我们不能在公共场所，随地吐痰，乱丢纸屑、烟头等杂物，不注意环保。让口香糖使它长满了黑斑，乱扔塑料袋，造成“白色污染”，还使它寸草不生、龌龊不堪，到处都是浑浊的世界。这些行为完全与社会主义的精神文明和社会公德相悖。水能载舟，也能覆舟。解铃还需系铃人。如果人类能及时弥补，能保护树木；节约用水；减少废水废气排放对环境的污染。我们中学生应积极参加公益劳动，让我们共同保护生活的环境，首先使自己的校园变的清洁,然后为城市的清洁出力。朋友们，献一份爱心和努力吧！必须从自我做起，从身边的小事做起，通过自己的行动来保护我们赖以生存的环境。不能再犯破坏生态环境的错误了。我们是祖国的公民，是21世纪的主人，所以我们对自己的祖国和人类负有责任，社会是我们共同的家园，社会成员的素质直接反映着整个社会的风气，中华民族有着五千年的文明史，作为一个礼仪之邦，讲公德是我们中华民族传统美德，作为每个社会成员，都有责任将这种传统美德发扬光大。要加强社会公德，社会需要公德。我们不能做不拘小节的人，讲公德、守秩序是社会和谐的基础。“美德出良才”良好的文明习惯来自于良好的道德品质的培养，只有从小事事处处“想到别人”，讲文明，守秩序，养成良好的习惯，长大后才可能具有文明礼貌的自觉行动。“亡羊补牢未为晚矣”。我们要向所有的人们敲响警钟，我们大声疾呼，我们只有一个地球呀!我们一定要保护我们的家园，从现在起，我们应该刻不容缓地行动起来，治理污染，绿化环境，不让污染的悲剧重演。争做“文明小卫士”。

绿色是生命的源泉，地球多一片森林，人类与大自然就会多一份和谐。植树造林是人类维护生态平衡、改善自然环境的重大举措。当今社会正在由工业文明走向生态文明，生态觉醒已成为一个民族、一个国家、一个地区文明进步的重要标志。今天我们走在建设生态省、生态市、生态镇、生态村的建设征程中，大力开始植树造林、绿化、美化我们的家园，保护我们的生态环境和生存环境，是历史赋予我们的光荣使命。当前，绿化在整个生态环境中的作用越来越大，这已成为世人的共识。1、森林是陆地生态系统的主体，是人类赖以生存的重要自然资源，在调节气候、涵养水源、保持水土、防风固沙、净化空气及维护自然生态平衡等方面具有不可替代的作用。据测算：一亩林地，每天可吸收67公斤一氧化碳，呼出氧气49公斤，可供65人一天所用；每公顷森林可蓄水500-2000立方米，一亩有林地比无林地可多蓄水20吨；绿化带的背风面降尘量为空旷地的十五分之一，一亩林地一年可吸附各种尘埃4吨。

"The path strangled onward into the mystery of the primeval forest"(179) This sentence displays just one of the multiple personalities that the forest symbolizes in The Scarlet Letter written by Nathaniel H In the Scarlet Letter the forest symbolizes much more than one might Each character brings out a different side of the forest, however the forest also brings out a different side in each For some the forest may be a place of sinister thoughts and wrong doing, but for others it is a place of happiness and The first encounter with the forest we have symbolizes just some of the evil that lingers within the darkness of the As Hester and Pearl are leaving governor Bellinghams estate they are confronted by mistress Hibbins who explains that the witches are meeting in the forest, and she then invites Hester to become more deeply involved with her evil "Wilt thou go with us tonight"(113) asked mistress Hibbins, yet Hester refused to sign her name in the black mans book on that She explains that the only reason she does not sign is because Pearl is still in her At this time the forest itself is a open door to another world, a wicked world that would take her away from her present situation, but that is not the only door that the forest The forest is an open door to love and freedom for both Hester and D It is a place where the letter on their bodies can no longer have an effect on them if they A world ruled by nature and governed by natural law as opposed to the artificial strict community with its man made puritan Its as if the forest represents a key to the shackles the Hester and Dimmesdale have been forced to wear, all that they have to do is unlock Although if they choose not to unlock them, they begin to dwell on the things that they have done to deserve the In this the forest represents a thing of truth, weather it be good or In pearls eyes the forest has a totally different To Pearl the forest is like a best It treats her as if she were one of its The animals do not runaway at her ever move, instead they come to her with open The light is chasing her no matter where she She is able to run and play freely to her innocent hearts She can do that because her heart is innocent and the forest recognizes When reading this book you can look deeper into the forest and find more powerful symbols The sunlight is one of the most obvious of them While Pearl plays in the forest the sunlight seems to find her no matter where she is At the same time it will not cast a single glimmer of light onto Hester, until she removes her scarlet Then at that point the sun breaks through the dense trees and gazes upon The light is a symbol of purity and It does not shine on Hester when she has the letter because the letter itself is not pure, even though everything underneath the letter has become pure through the The Brooke that runs through the forest is also full of At one point of the story the Brooke represents a "Then strange child, why does thou not come to me?"(205) asks H She explains that she will not cross the Brooke because she Hester is not wearing her To Dimmesdale the Brooke then becomes a boundary between two worlds, a world of Peace and freedom and a world of lies and The Brooke is also known to symbolize one more thing throughout the entire It is often suggestive that the Brooke often represents One reason is because the Brooke has an unknown source, Pearl also has an unknown source, meaning that most people don't know where the Brooke or Pearl came One more similarity between the two is that the Brooke is woven trough a dark and often evil forest, yet the water does not stop Pearl is in the exact same Throughout her hole life she has been unwillingly woven into the evil and sorrow the her mother deals So just as the Brooke she keeps on As you have seen there is a fountain of symbolism in the Scarlet L The forest is one of the most symbolized objects in the entire It is one thing that can bring joy, sorrow, freedom, and evil to your life, but most of all the forest brings you Once you walk into the forest lies no longer This is show in every example given, that the truth comes out in the forest no matter Maybe that is why these characters go there, because it is the only place truth