模拟酸雨对毛竹凋落物分解的影响  

Effects of Simulated Acid Rain on the Decomposition of Phyllostachys pubescens

作　　者：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] 

机构地区：[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

出　　处：《中山大学学报（自然科学版）》2010年第2期95-99,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：科技部"973"资助项目(2005CB422207);国家自然科学基金资助项目(40671132);科技部数据共享平台建设基金资助项目(2005DKA32306;2006DKA32308);科技部国际合作项目资助项目(20073819);科技部重大科技基础资助项目(2007FY110300);浙江省重大科技专项资助项目(2008C13G2100010);浙江林学院科学发展基金;浙江省森林培育重中之重学科开放基金资助(200608)

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(pH4.0)和重度(pH2.5)酸雨胁迫处理和对照实验(pH5.6),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。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 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.

关 键 词：酸雨 毛竹 凋落物分解 

分 类 号：S718.5[农业科学—林学]