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1、学习文档仅供参考城市绿化对减轻环境污染的重要性探讨随着现代工业的不断发展，在城市的生产和生活中，向自然界排放的的各种污染物超过了自然环境的自净能力，从而遗留在自然界，导致自然环境各种因素的性质和功能发生变异，破坏生态平衡，给人类的身体、生产和生活带来危害。我们生活在城市，每天呼吸在看似洁净的空气，走在看似很洁净的大街上，匆忙生活着。但是，现在让我们认识一下周边的城市环境。(一)环境污染的种类一、大气污染近年监测的522个城市中，39.7%的城市处于中度或重度污染。颗粒物仍是影响环境空气质量的首要污染物。除燃煤外，粉尘、地面扬尘、建筑工地尘、土壤风蚀尘等都对空气中颗粒物浓度有较大影响，特别是可吸
2、入颗粒物对人体健康造成的危害更人，目前大多数城市人口长期生活在可吸入颗粒物超标的环境空气中。近年来，城市机动车持有量快速增加，机动车尾气排放已经成为大城市空气污染的重要来源，其中氮氧化物排放量已占总量的 50%，一氧化碳占85%。二、水污染水的污染有两类：一类是自然污染；另类是人为污染。当前对水体危害较大的是人为污染。水污染主要由人类活动产生的污染物而造成的，它包括污染源、农业污染源和生活污染源三大部分。城市水污染主要来自工业废水和生活污水，全固有监测的1200 多条河流中，目前850 多条受到污染，90%以上的城市水域也遭到污染。日趋加剧的水污染，已对人类的生存安全构成重大威胁，成为人类健康
3、和社会持学习文档仅供参考续发展的重大障碍。据世界权威机构调查，在发展中国家各类疾病有8%是因为饮用不卫生的水而传播的，每年因饮用不卫生水至少造成全球2000万人死产，因此，水污染被称作“世界头号杀手”。三、噪声污染噪声污染，是指所产生的环境噪声超过国家规定的环境噪声排放标准，并干扰他人正常生活、工作和学习的现象。从噪声源强剖析，噪声级别最高，其次是施工噪声和家产噪声。噪声级为3040 分贝是对为正常环境；超过 50 分贝就会影响就寝和歇息。因为歇息不适，正常心理受到影响：70分贝以上会造成心烦意乱，精神不集中，影响做事效率，乃至产生事故；90 分贝以上的噪声环境，会主要影响和导致其他疾病的产生
4、。四、光污染随着城市的，高楼大厦如雨后春笋般涌现。在城市繁华的街道上，高楼大厦穿着高大明亮、富丽豪华的玻璃“外套”，即“玻璃幕墙”。然而，在这美观的背后却隐藏着许多意想不到的隐患。夏天，玻璃幕墙把强烈的阳光反射入附近的居民楼房里，增加了室内的温度，影响了居民的正常生活。有些玻璃幕墙是半圆形的，反射光有时聚集在起，温度很高，易引起火灾。同时镜面玻璃的反射系数比绿地、森林、以及毛面砖石装修建筑物大 10 倍以上大大超过了人眼范围。因此，玻璃幕墙的反射光会伤害人眼球的角膜和虹膜，引起视力下降，增加白内障的发病率。五、电磁波污染电磁波污染是指天然的和人为的各种电磁波的干扰及有害的电磁辐射。由于广播、电
5、视、微波披术的射频设备功率成倍增加，地面上的电磁辐射大幅度增加，已到达直接威胁人体健康的程度。伴随着科技文明的迅速发展，各种生活用品愈加普及起来，电磁波污染也就变得无处不在，由此而引发出的种种病症，必须引起我们的高度重视，并对其危害加强防范。文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H
6、7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V
7、3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2
8、文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y
9、3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O
10、8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7
11、D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2学习文档仅供参考六、固
12、体废弃物污染固体废弃物就是一般所说的垃圾，是人类新陈代谢排泄物和消费品消费后的废弃物品。目前城市居民的生活垃圾、商业垃圾、市政维护和管理中产生的垃圾，以及工业生产排出的固体废弃物，数量急剧增加，成分日益复杂。世界各国的垃圾以高于其增长速度23 倍的平均速度增长。垃圾假设不及时清除，必然污染空气，对土壤、水体都会造成严重污染。从而导致蚊蝇滋生、细菌繁殖，使疾病迅速传播，危害人体健康。七、土壤污染土壤的污染源包括烂施化肥农药，工业废水和废渣以及生活污水和垃圾等。我国的土壤污染问题已经相当严重，并且对水环境质量和农产品质量构成明显的威胁。但是目前对土壤污染问题并没有像大气污染和水污染那样重视。近年来
13、，我国在“三废”处理、污灌控制、低毒新农药应用等方面做出了显著的成绩，但是预期在近期内土壤污染问题，尤其是在城郊和乡镇密集区和化肥、农药用量较大的地区仍将呈逐渐加重的趋势。在这种情况下，人们不能被动地等待自然界的恩赐，必须主动改善和创造良好的生存环境。因此，防治环境污染和提高环境质量是摆在人们面前的项艰巨的任务。而通过栽花种草，建设绿色宝库，构成完整的绿地系统和优美的景观效果，可以有效地防治和减轻污染、美化环境。为此，下面就城市绿化进行探讨，以促进其在城市发展中的作用。二城市绿化可改善城市的卫生条件一、净化空气城镇的各类绿地，以其巨大的叶面积，浓密的枝干，阻滞、过滤、吸附空中的灰尘、飘尘，同时
14、还能起到滞留、分散、吸收空气中各种有毒气体的作用，从而可使空气得到净化。树林是净化大气的特殊“过滤器”。例如，在一家水泥厂栽植两行并列的大杨树，能使空气中的降尘量减少33%文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L
15、5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3
16、I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9
17、K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL
18、1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8
19、H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8
20、P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2学习文档仅供参考52%。可见，城镇中栽植各种绿色植物，对调节空气流动、净化空气有十分重要的作
21、用。二、调节气候首先，园林植物可以调节温度。园林绿化可以调节气温，起到冬暖夏凉的作用。在炎热的夏季，树木庞大的叶面积可以遮阳，能有效地反射太阳辐射，大大减少阳光对地面的直射。树木通过叶片蒸发水分，可降低自身的温度，提高附近的空气湿度。因而夏季绿地内的气温较非绿地气温低35，较建筑物地区的气温降低10左右。因此，城市绿地面积大、覆盖率高，能有效地改善居民居住区小气候。在绿化好的地方，夏季人们会感到空气清新，可以消暑纳凉、防暑降温。冬季，树木能降低风速，减弱冷空气的侵入，树林内及其背向的一侧，温度可提高12。其次，园林植物可以调节空气流动。由于绿化区和非绿化区之间的温度存在差异，绿地的气温较邻近的
22、非绿地气温要低。按照气温扩散升降规律，冷空气要向热空气地区流动，有时流动速度可达1m/s，从而可形成轻微的风，使人感到凉爽。最后，园林植物可以调节湿度，是温度的“调节器”。植物通过叶片蒸腾水分，使土地的大量水分被释放到空气中，使空气中的湿度明显增加。据研究，因为根部吸收的水分几乎都被蒸发，所以，森林中空气的湿度比城市内高30%左右。由于树木强大的蒸腾作用，使水气增多，空气湿润，因而，绿化区内湿度比非绿化区大l0%20%,，从而为人们在生产、生活创造了凉爽、舒适的气候环境。三、减弱噪音现代城市噪音污染越来越严重，噪音不仅影响人们的正常生活，严重的还能危害人们的健康，影响人们的中枢神经系统和精神反
23、应，导致人们出现精神不振、疲劳过度、血压增高等症状。利用乔木的庞大树冠和枝干，则可以吸收和隔离噪声。据测定，在没有树木的高大建筑林立的街道上噪文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I1
24、0O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8
25、M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L
26、5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3
27、I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9
28、K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL
29、1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2学习文档仅供参考声强度比两侧种满树木的街道上大5 倍以上可见，城市绿化对减少噪音污染很重要。四、美化环境园林植物是城市景观
30、的重要组成部分。植物千姿百态、美丽的外形，丰富了环境的空间变化。树木的高低错落，树形的各式各样，树冠的大小差异，打破了建筑物的平直单调而变得生动、活泼，从而加深了，城市环境的空间感和层次感。各类植物随着季节变化，呈现不同的季相色彩，如五角枫、三角枫、红瑞木等树种秋叶变红，金银忍冬、鸡树条荚蒾等树种果穗冬季宿存枝头，成为寒冷冬天的独特景观。花卉的色彩更是五彩缤纷，因此，对城市进行合理的绿化，可以使城市变得色彩斑斓、生机盎然，美丽的生存环境使人们赏心悦目。五、防灾减灾许多园林绿化树木具有强大的耐火性，有着突出的防火功能。例如：叶片密集而均匀的松柏可阻挡95%左右的辐射热通过，珊瑚树可阻挡83%93
31、%的热量通过，其作用可与避火墙相媲美。在江河湖泊岸边植树种草，可以修养水源，净化水质，因土护岸，减少水土流失，降低污染、沉积泥沙。六、监测环境植物对大气污染的反应，比人类敏感很多，污染物质对植物的毒害会以各种形式表现出来。植物的这种反应就是显现环境污染的“信号”。人们可以根据植物所发出的“信号”来分析鉴别环境污染程度。利用植物进行环境监测，范围广泛、方法简单、成本低廉，有利于开展群众性的环境报警工作，日益受到有关部门的重视。三城市绿化具有良好的经济效益一、园林植物的生产价值文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8
32、H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8
33、P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:
34、CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 H
35、M8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 Z
36、A8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编
37、码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7
38、 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2学习文档仅供参考很多园林植物有多种用途，既是经济植物，又有很高的欣赏价值，还可以兼收不少副产品。因此，把园林绿化和生产开发有机地结合在一起，既有可观的经济收入，又起到绿化美化的效果，进而实现园林绿化产业价值。二、园林植物可提供工业原料园林植物中的芦苇、竹类、杨树可做造纸原料；玫瑰可以提供天然香料，调制香精；蒲葵叶可作扇子：园林植物中的核桃、连翘、金银花、芍药、菊花等均为重要的药用植物
39、。园林植物中的水杉、黑松、鹅掌楸等，都是优良材质及欣赏价值兼具的园林植物。园林植物可提供工业原料，也可提供多种经营货源；还可利用园林植物树种的根加工成盆景和根雕等，发展艺术产业。三、城市绿化有益身心健康3.1 植物具有杀菌功能绿化可以减少空气含菌量，很多园林植物具有抑制杀死散布在空气中多种细菌的功能。这些植物的根、茎、叶、花等器官，能分泌一些对各种微生物或病菌有杀死或抑制其发展的挥发性物质，人们把这种物质叫做“植物杀菌素”。如松树、柏树、杨树、金银花等都含有一定的杀菌素。乔木稠李的分泌物对蚊子有强烈的致命作用。居住区的绿地环境与非绿地环境对照，绿地地区在夏季灭菌可达20%59%。可见，城市绿化
40、给人类带来多种益处，对促进人类身心健康有着良好的作用。植物能净化水源绿色植物能净化空气，保护水质，防止下游的水土污染。如含有大肠杆菌的污水，假设从3040m 宽的松林流过，细菌数量可减少到原有的l8；从栎树、白蜡和金合欢的混交林巾流出的水中，大肠杆菌只有对照值的 1/23；水假设从 50m 宽的三十年生杨、桦混交林通过后，细菌数量能减文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L
41、5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3
42、I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9
43、K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL
44、1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8
45、H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8
46、P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:
47、CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2学习文档仅供参考少 9/10 以上。污水进入土壤后，通过绿色植物的吸收、土壤微生物的降解以及土壤的吸附、沉淀、离子交换、粘士矿物固定等，能在很大程度上得到净化。3.3 植物有助于发展园艺疗法园艺疗法是通过“绿”的自然环境到达调节自身压力、促进内分泌系统的正常循环、增加自身免疫力的一种疗法。特别值得注意的是”森林浴”、“芳香疗法”已被业界广泛认知，经过医学验证这些行为确实对健康有益。当今，森林园艺法疗悄然兴起，世界上许多国家设立了森林园艺疗法医院，可有效治疗人们所患的某些疾病。在这些医院里，不吃药、不打针，也不需要医生治疗，
48、凭借环境，通过栽培果树、花卉、蔬菜等园艺活动，使人们在绿色的环境中治疗疾病，恢复健康。利用园艺植物的多种颜色治疗疾病，是园艺疗法的重要内容。研究说明，浅蓝色的花对发烧病人具有良好的镇静作用，红色的鲜花能增加病人的食欲，紫色的鲜花可使孕妇心情恬静，赤红色的花对低血压患者稳定血压大有裨益。身处绿色植物环境中的人，其脉搏、呼吸的频度明显减低，血流速度也会减慢，紧张的神经会变得舒缓，听觉和思维活动的灵敏性得到增强。我国湖北省的索山寺国家森林公园已成为一处经济、生态、社会效益三赢的森林浴场。3.4 植物可减轻土壤污染带有农药及其污染物的风蚀尘土大部分最终会落于地面，对土壤会产生污染。园林植物因土护坡，减
49、少地表径流，保持水土，调节气候，减轻风蚀尘土，能有效减轻土壤进一步污染。随着技术水平的发展，我们的生活水平正在逐渐提高，而我们生存环境中的污染也在逐渐加重，特别是我们生活的城市，城市环境污染已经成为全世界共同研究的课题，希望我们在环境保护方面作出自己所能做的奉献。保护环境，从我做起，从小做起，相信在不久的将来，一定可以再次文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H
50、7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V3 ZA8P9K8M7D2文档编码:CL1L5M7Y3H7 HM8H3I10O8V