文献类型：期刊文献

中文题名：短期模拟增温对杭州湾滨海湿地芦苇群落土壤呼吸速率的影响

英文题名：Effects of Simulated Short-Term Elevated Temperature on Soil Respiration Rate in the Reed Community in Hangzhou Bay Wetland

作者：杨文英[1,2] 邵学新[2] 吴明[2] 刘芸[1]

第一作者：杨文英

机构：[1]西南大学资源环境学院;[2]中国林业科学研究院亚热带林业研究所

年份：2012

卷号：34

期号：3

起止页码：83-89

中文期刊名：西南大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：中国林科院基本科研业务费专项(CAFYBB2008018);"十一五"国家科技攻关专题(2006BAD03A1902)

语种：中文

中文关键词：增温;芦苇群落;土壤呼吸速率;土壤酶活性;Q10值

外文关键词：elevated temperature;reed community; soil respiration rate;soil enzyme activity; Q10 value

分类号：S718.516

摘要：采用原位OTCs模拟增温和LICOR-6400-09土壤呼吸室法,研究了杭州湾滨海湿地芦苇群落土壤呼吸及土壤酶活性对温度升高的响应.结果表明,通过短期的模拟增温,土壤呼吸速率与对照相比提高了17.36%;增温和对照的土壤呼吸速率日变化幅度分别为:3.23±0.29和2.75±0.68μmol/(m2.s);日动态变化呈单峰曲线,峰值出现在14:00左右,最低值在早上6:00;增温和对照下的土壤呼吸速率与10cm土壤温度呈极显著的指数相关性(p<0.01);与空气温度呈显著性指数相关性(p<0.05);增温和对照处理下Q10值分别为:3.42和2.74;在0～10cm土层,β-葡萄糖苷酶、蔗糖酶活性比对照有显著的提高(p>0.05),脲酶酶活性也有一定的提高(0.76%),碱性磷酸酶活性比对照略有降低(2.54%).
To investigate the effects of simulated short-term elevated temperature on soil respiration rate in the reed community, a simulation study was conducted in situ with open-top chambers and an LICOR-6400 photosynthesis system connected to 09 soil respiration chamber to measure soil respiration. Compared with the control, short-term simulation of warming increased soil respiration rate by 17. 36%. The diurnal variation of soil respiration rate in the elevated temperature treatment and the control was 3.23±0. 28 μmol/ （m^2 · s） and 2.75±0.68μmol/（m^2· s） ; respectively. The diurnal variation was characterized by a single peak curve, with the peak occurring at about 14.00 and the minimum occurring at 6：00 in the morning; Soil respiration rate in the elevated temperature treatment and the control was in a highly significant correlation with soil temperature at 10 cm （p〈0.01） and was in a significant correlation with air temperature （p〈0.05）. The Q10 value in the elevated temperature treatment and the control was 2.74 and 3.42, respectively. In the 0-10 cm soil layer, β-glucosidase activity and invertase activity significantly increased in the elevated temperature treatment as compared with the control （p〉0.05）, urease activity increased to a certain extent （0.76%）, and alkaline phosphatase activity was slightly lower（2. 54%）.