|
|||||
|
|
| 广州市酸雨对不同森林冠层淋溶规律的研究 | |
| 引用本文： | 周光益,徐义刚,吴仲民,骆土寿,李炳球,何在成.广州市酸雨对不同森林冠层淋溶规律的研究[J].林业科学研究,2000,13(6):598-607. |
| 作者姓名： | 周光益 徐义刚 吴仲民 骆土寿 李炳球 何在成 |
| 作者单位： | 1. 中国林业科学研究院,热带林业研究所,广东,广州,510520 2. 中国科学院,广州地球化学研究所,广东,广州,510640 3. 广州市白云山园林管理局,广东,广州,510405 |
| 基金项目： | 广东省博士启动基金，广东省林业厅科研项目 |
| 摘 要： | １９９８年４月至１９９９年３月对广州市白云山马尾松林和常绿阔叶林、广州市龙眼洞马尾松林两试验点进行了酸雨的监测，并测定和分析了林内穿透雨物理量及化学量，旨在探讨酸雨对不同森林冠层养分淋溶规律的影响。结果表明：（１）广州市酸雨占次数的７９．７％或占降雨量的９５．１％。（２）酸雨通过林冠层后，ｐＨ值明显增加。（３）在马尾松林和常绿阔叶林中，某些单次降雨出现ＳＯ４＾２－、ＮＯ３＾－、ＮＨ４＾＋Ａｌ＾３＋、Ｎａ＾＋的负淋溶现象，说明森林对这些离子（特别是ＮＯ３＾－、Ａａ＾３＋）具有吸收作用；阔叶林全年的ＮＯ３＾－和Ａｌ＾３＋净淋溶为负值，说明阔叶林比马尾松林对这两种离子具有更强的吸收能力。（４）雨水酸度增加（即ｐＨ值减小），明显提高阳离子Ｃａ＾２＋、Ｍｇ＾２＋、Ｋ＾＋和Ｎａ＾＋冠层淋溶面分率。（５）ＮＨ４＾＋、ＳＯ４＾ |
| 关 键 词： | 酸雨 冠层淋溶 马尾松 南亚热带常绿阔叶林 |
| 收稿时间： | 2000/3/13 0:00:00 |
Influences of Acid Rain on Crown Leaching of Chemical Ions in Different Forest Ecosystem in Guangzhou |
|
| ZHOU Guang-yi,XU Yi-gang,Wu Zhong-min,Luo Tu-shou,LI Bing-qiu and HE Zai-cheng.Influences of Acid Rain on Crown Leaching of Chemical Ions in Different Forest Ecosystem in Guangzhou[J].Forest Research,2000,13(6):598-607. | |
| Authors: | ZHOU Guang-yi XU Yi-gang Wu Zhong-min Luo Tu-shou LI Bing-qiu and HE Zai-cheng |
| Institution: | Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China;Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China;Research Institute of Tropical Forestry, CAF, Guangzhou 510520, Guangdong, China;Administration Bureau of Baiyunshan Park of Guangzhou City, Guangzhou 510405, Guangdong, China;Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China |
| Abstract: | The rainfall and throughfall in Pinus massoniana forest and subtropical evergreen broad leaved forest at Baiyunshan and in P.massoniana plantation at Longyandong were measured during the period of April 1998 to March 1999.The collected samples of rainfall and throughfall were used for analyzing pH value and major element compositions (SO42-,NO3-,NH4+,Al3+,Ca2+,Mg2+,K+,Na+).And hence, the crown leaching of main chemical ions in the forests and the relationships between canopy leaching and acid rain were studied.The results indicates that:(1)The frequency of acid rain in Guangzhou is 79.7%, and the amount of acid rain accounts for 95.1% of annual rainfall.(2)The pH value of throughfall in the forest ecosystems is obriously higher than that of rainfall because of the ion exchange in canopy.(3)During the process of some rain, SO42-,NO3-,NH4+,Al3+,Na+ appeared negative leaching in the pine forests and evergreen broad leaved forest, this phenomenon illustrates that the forests can absorb these ions (especially NO3- and Al3+) under the condition of acid rain.In view of annual net crown leaching, the net leaching of NO3- and Al3+ in the broad leaved forest is -0.85 and -0.06 kg·hm2·a-1, respectively, and that in two pine forests are positive leaching, this also illustrates that the evergreen broad leaved forest has great capacity of absorbing NO3- and Al3+ .(4)Increase of acidity of rain can obviously increase the ratio of crown leaching of Ca2+,Mg2+,K+ and Na+.(5)The ratios of crown leaching of NH4+, SO42- and NO3- have close negative interrelation to the concentration of SO42- and NO3- in rainfall.(6) The crown leaching array of major elements from high to low in evergreen broad leaved forest at Baiyunshan is K+>Mg2+ >SO42- >NH4+>Ca2+ >Na+>Al3+ >NO3-, in P.massoniana forest at Baiyunshan is K+>Mg2+ >NH4+>SO42- >Ca2+ >NO3->Na+>Al3+, in P.massoniana plantation at Longyandong is K+>Mg2+ >SO42- >NH4+>Ca2+ >Na+>NO3->Al3+ . |
| Keywords: | acid rain crown leaching Pinus massoniana southern subtropical evergreen broad leaved fore |
| 本文献已被 维普 万方数据 等数据库收录！ | |
| 点击此处可从《林业科学研究》浏览原始摘要信息 | |
| 点击此处可从《林业科学研究》下载免费的PDF全文 | |