降水变化对樟子松人工林土壤呼吸速率及其表观温度敏感性Q10的影响

北京大学学报（自然科学版）

降水变化对樟子松人工林土壤呼吸速率及其表观温度敏感性Q₁₀的影响

任艳林,杜恩在

北京大学城市与环境学院生态学系, 北京 100871;

收稿日期:2012-05-14 出版日期:2012-11-20 发布日期:2012-11-20

Effects of Precipitation Change on Soil Respiration Rate and Apparent Q₁₀ of Temperature Sensitivity in a Mongolian Pine Plantation

REN Yanlin, DU Enzai

Department of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing 100871;

Received:2012-05-14 Online:2012-11-20 Published:2012-11-20

摘要/Abstract

摘要： 为了研究降水变化对土壤呼吸及其温度敏感性的影响, 在北京大学地球环境与生态系统塞罕坝实验站的樟子松(Pinus sylvestris var. mongolica)人工林中进行了降水控制实验, 用减雨30%、增雨30%和对照3种穿透雨处理来模拟长期的降水变化情景。重复测量方差分析结果表明, 3种穿透雨处理总体上对生长季土壤呼吸速率及其表观温度敏感性Q₁₀无显著影响p>0.05)。配对t检验多重比较结果则显示, 土壤呼吸速率平均值大小为对照<减雨30%<增雨30%, 增雨处理的土壤呼吸速率显著高于对照 (p<0.001), 对照和减雨处理之间无显著差异(p>0.05); 土壤呼吸表观Q₁₀平均值大小为减雨30%<对照<增雨30%, 随着降水量增加, 表观Q₁₀逐渐增大, 但处理间差异在统计上并不显著(p>0.05)。研究结果意味着降水量减少30%可能对森林土壤呼吸的限制较小, 而降水量增加30%则可能显著地增加土壤呼吸CO₂释放量。

关键词: 土壤呼吸速率, 表观Q₁₀降水变化, 控制实验, 塞罕坝

Abstract: A chronic field manipulative experiment of ±30% throughfall (+30%, ?30%, and control, respectively) in a Mongolian pine plantation was carried out to detect the responses of forest soil respiration and its temperature sensitivity to precipitation change at PKU-SOGES, China. Results of repeated measures ANOVA indicate that there is no statistically significant effect of three throughfall treatments on soil respiration rates and apparent Q₁₀ generally (p>0.05). Multiple comparisons of paired t-test show that the soil respiration rates of +30% is statistically higher than that of the control (p<0.001), and the latter is not different from ?30% statistically (p >0.05). The order of apparent temperature sensitivity of soil respiration for three throughfall treatments is ?30% < control < +30% (p >0.05), which has a weak increasing trend along with increased precipitation. The results imply that the impact of chronic precipitation decrease of 30% on forest soil respiration may be rather limited, but the precipitation increase of 30% will stimulate soil CO₂ efflux dramatically.

Key words: soil respiration rate, apparent Q₁₀, precipitation change, manipulative experiment, Saihanba

中图分类号:

X171

任艳林,杜恩在. 降水变化对樟子松人工林土壤呼吸速率及其表观温度敏感性Q₁₀的影响[J]. 北京大学学报（自然科学版）.

REN Yanlin,DU Enzai. Effects of Precipitation Change on Soil Respiration Rate and Apparent Q₁₀ of Temperature Sensitivity in a Mongolian Pine Plantation[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://xbna.pku.edu.cn/CN/

https://xbna.pku.edu.cn/CN/Y2012/V48/I6/933

[1]	王嘉慧,方圆,王娓,张馨月,杨艳. 土壤呼吸日动态同温度的关系以及最适测定时间[J]. 北京大学学报（自然科学版）, 2015, 51(1): 159-170.
[2]	任艳林. 降水变化对樟子松人工林土壤无机氮和净氮矿化速率的影响[J]. 北京大学学报（自然科学版）, 2012, 48(6): 925-932.
[3]	任艳林. 1965?2011年河北塞罕坝地区降水量变化规律的小波分析[J]. 北京大学学报（自然科学版）, 2012, 48(6): 918-924.
[4]	魏天凤任艳林曾辉贺金生. 降水改变对樟子松人工林土壤微生物量碳及微生物商动态变化的影响[J]. 北京大学学报（自然科学版）, 2009, 45(3): 533-540.

降水变化对樟子松人工林土壤呼吸速率及其表观温度敏感性Q₁₀的影响

Effects of Precipitation Change on Soil Respiration Rate and Apparent Q₁₀ of Temperature Sensitivity in a Mongolian Pine Plantation

PDF

PDF (翻译版)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 4

编辑推荐

Metrics

留言