野外林下环境中模拟气候变暖的新型开顶式气室设计与应用效果  

Design and Application of New Open-top Chamber with Simulated Climate Warming in Field Understory Environment

作　　者：张栋耀 杨洪波 吴代福 冯彬 李玉杰[1,2] 张和民 王鹏彦 张晋东 ZHANG Dong-yao;YANG Hong-bo;WU Dai-fu;FENG bin;LI Yu-jie;ZHANG He-min;WANG Peng-yan;ZHANG Jin-dong(Key Laboratory of Southwest China Wildlife Resources Conservation(Ministry of Education)China West Normal University,Nanchong Sichuan 637009,China;College of Life Science,China West Normal University,Nanchong Sichuan 637009,China;China Conservation and Research Center for Giant Panda,Dujiangyan Sichuan 611830,China;Sichuan Wolong National Natural Reserve Administration,Wenchuan Sichuan 623006,China)

机构地区：[1]西华师范大学西南野生动植物资源保护教育部重点实验室,四川南充637009 [2]西华师范大学生命科学学院,四川南充637009 [3]中国大熊猫保护研究中心,四川都江堰611830 [4]四川省卧龙国家级自然保护区管理局,四川汶川623006

出　　处：《西华师范大学学报（自然科学版）》2023年第1期19-24,共6页Journal of China West Normal University(Natural Sciences)

基　　金：国家自然科学基金面上项目(42071279,31801991);国家自然科学基金联合基金项目(U21A20193);西南野生动植物资源保护教育部重点实验室开放基金项目(XNYB19-01)。

摘　　要：开顶式气室(OTC)是研究气候变化对植物生长和营养状况影响的重要工具。然而在野外森林环境条件下,运用传统OTC系统研究气候变化对林下植物生长影响,存在太阳辐射不足、增温效果波动大或运行成本高等局限。本文改良出一种稳定增温、价格低廉的新型OTC系统,并将其用于研究气候变暖对野外林下环境冷箭竹(Bashania faberi)生长实验中,以评价其性能。结果表明:在为期两年测试期间,气室内能提供稳定增温条件,3个处理组与对照组相比,分别增温了1.5、3.0和4.5℃,并且日平均温度控制偏差可达±1℃以内。此外,不同增温处理对新型OTC内空气湿度影响较小,对土壤湿度影响不明显。实验证明了该系统以低成本研究温度变化对植物影响的可行性,表明该系统是研究气候变化对森林生态系统中林下植物影响的一种有效工具。Although open-top chamber(OTC) is an important tool for studying the impact of climate change on the growth and nutritional status of plants, the traditional OTC system has the limitations of insufficient solar radiation, large fluctuation of warming effect and high operation cost in studying the growth of understory plants in field forest environment.Based on the previous studies, this paper proposes an improved and inexpensive OTC system with stable warming.The performance of the new OTC system is evaluated by its application in studying the impact of climate warming on the growth of arrow bamboo(Bashania fangiana) in field understory environment.The results show that stable warming conditions have been generated in the chamber during the two-year test period;the temperature of the three treatment groups has increased by 1.5 ℃,3 ℃ and 4.5 ℃ respectively, compared with that of the control group;the daily average temperature control deviation is kept within ± 1 ℃.What’s more, different warming treatments has little effect on air moisture in the OTC,and no obvious effect on soil moisture.The experimental results have proved that the system is effective in studying the impact of climate change on plants at low cost.Therefore, it is an effective tool for studying the impact of climate change on understory plants in forest ecosystem.

关 键 词：开顶式气室 增温模拟 改进效果 冷箭竹 

分 类 号：Q94-337[生物学—植物学]