中山大学学报自然科学版 ›› 2010, Vol. 49 ›› Issue (2): 95-99.

• 论文 • 上一篇    下一篇

模拟酸雨对毛竹凋落物分解的影响

马元丹1,江 洪1, 2,余树全1,周国模1,窦荣鹏1,郭培培1,王 彬1,宋新章1   

  1. (1. 浙江林学院国际空间生态与生态系统生态研究中心,浙江 杭州311300;2. 南京大学国际地球系统科学研究所,江苏 南京 210093)
  • 收稿日期:2009-03-03 修回日期:1900-01-01 出版日期:2010-03-25 发布日期:2010-03-25

Effects of Simulated Acid Rain on the Decomposition of Phyllostachys pubescens

MA Yuandan1, JIANG Hong1, 2, YU Shuquan1, ZHOU Guomo1, 
DOU Rongpeng1, GUO Peipei1, WANG Bin1, SONG Xinzhang1
  

  1. (1. International Research Center of Spatial Ecology and Ecosystem Ecology, Zhejiang Forestry University, Hangzhou 311300, China;  2. International Institute for Earth System Sciences, Nanjing University, Nanjing 210093, China)
  • Received:2009-03-03 Revised:1900-01-01 Online:2010-03-25 Published:2010-03-25

摘要: 2006年9月开始,采用分解袋法,在酸雨危害较为严重的浙江省临安市,模拟研究了酸雨对毛竹叶凋落物分解的影响。实验设置中度(pH 4.0)和重度(pH 2.5)酸雨胁迫处理和对照实验(pH 5.6),每种处理3次重复。结果表明,在酸雨胁迫条件下,凋落物分解速率受到不同程度的制约,毛竹的分解速率随酸雨胁迫强度的增强而减小。毛竹凋落物在对照组中分解速率最高(0.69),其次是在中度酸雨胁迫下的分解速率(0.57),而重度酸雨胁迫下分解速率最低(0.33)。在重度和中度酸雨胁迫下以及对照处理中,凋落物分解95%的时间分别为9.08 a,5.26 a和4.34 a。随着酸雨胁迫强度的增强,毛竹凋落物分解速率对酸雨胁迫的响应表现越敏感。

关键词: 酸雨, 毛竹, 凋落物分解

Abstract: The effects of simulated acid rain on leaf litter decomposition of Phyllostachys pubescens were studied by litterbag methods in Lin'an City of Zhejiang Province since September 2006, which is in severe acid rain stress regions. Three simulated acid rain treatments were applied to the litter decomposition: severe acid rain (pH 2.5), moderate acid rain (pH 4.0) and control (pH 5.6). There were three repeats in each treatment. The results showed that the litter decomposition rate of P. pubescens leaf has been slowed down with the increase of the stress grade of acid rain. The litter decomposition rate of P. pubescens leaf was the fastest in the control treatment (decomposition rate is 0.69), was medium in the moderate acid rain stress (0.57), and was the lowest in the severe acid rain stress (0.33). Time for 95% of 〖WTBX〗P. pubescens litter has been decomposed under the severe acid rain stress, moderate acid rain stress and control treatment are 9.08a, 5.26a and 4.34 a, respectively. The sensitivity of the litter decomposition rate of P. pubescens leaf to acid rain has become strong with the increase of the acid stress.

Key words: acid rain, Phyllostachys pubescens, litter decomposition

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