华东师范大学学报（自然科学版）Issue(5)：27-34,8.DOI:10.3969/j.issn.1000-5641.2013.05.004
滨海围垦湿地芦苇凋落物分解对模拟增温的响应
Responses of decomposition of Phragmites australis litter to simulated temperature enhancement in the reclamed coastal wetland
摘要
Abstract
By using open-top growth chambers (OTC) to simulate short-term warming and mesh bags,the study was carried out in the reclaimed wetland in the east Chongming tidal flat.The effects of short-term simulated warming (1.984 ± 0.7) ℃ on the decomposition of Phragmites australis litter were studied and the changes of correlations between decomposition rate and environmental parameters were analysed.The results are as follows:① stem decomposition rates in OTC plots and CG plots are 49.20％ and 45.11％,and leaves decomposition rates are 63.52％ and 58.53％,respectively,which shows that warming has increased the decomposition rates; ② stems average decomposition coefficients (K) in OTC plots and CG plots are 0.028 and 0.027,while the average decomposition coefficients of leaves are 0.093 and 0.080,respectively,which shows that the increment of leaves K is bigger than stems K; ③ the order of correlation degree between environmental factors and decomposition rate is:1.2 m air temperature＞ 0～5 cm soil temperature＞ 0～5 cm soil moisture,and the correlation coefficient between leaves decomposition rate and 1.2 m air temperature is biggest which is 6.43％.In summary,air temperature is the key factor affecting the Phragmites australis litter decomposition; meanwhile warming not only improves litters decomposition rates,but also changes the relevance between decomposition rate and environmental factors.关键词
湿地/芦苇/凋落物分解/增温/开顶式生长室Key words
wetland/ Phragmites australis / litter decomposition/ temperature enhancement/ open-top chambers (OTC)分类
农业科技引用本文复制引用
关阅章,刘安田,仲启铖,王开运..滨海围垦湿地芦苇凋落物分解对模拟增温的响应[J].华东师范大学学报（自然科学版）,2013,(5):27-34,8.基金项目
国家科技部"十一五"科技支撑重大项目(2006BAC01A14) （2006BAC01A14）
上海市科委科技创新行动计划(10dz1200602,10dz1200902) （10dz1200602,10dz1200902）
