Response of Soil Respiration Rate to Different Amounts of Simulated Rainfall in Platycladus Orientalis

ZHU Meng-xun; RAO Liang-yi; LI Hui-jie; SU Sai

doi:10.13961/j.cnki.stbctb.2014.02.021

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Response of Soil Respiration Rate to Different Amounts of Simulated Rainfall in Platycladus Orientalis

- Response of Soil Respiration Rate to Different Amounts of Simulated Rainfall in Platycladus Orientalis
- Bulletin of Soiland Water Conservation Vol. 33, Issue 2, Pages: 95-99(2014)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 水土保持与荒漠化防治教育部重点试验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.02.021
  CLC：
- Published：2014
- 稿件说明：
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ZHU Meng-xun, RAO Liang-yi, LI Hui-jie, et al. Response of Soil Respiration Rate to Different Amounts of Simulated Rainfall in Platycladus Orientalis[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 95-99.
DOI：

ZHU Meng-xun, RAO Liang-yi, LI Hui-jie, et al. Response of Soil Respiration Rate to Different Amounts of Simulated Rainfall in Platycladus Orientalis[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 95-99. DOI： 10.13961/j.cnki.stbctb.2014.02.021.

摘要

为了研究不同林龄的森林土壤呼吸速率对不同降雨量的响应规律

选取北京市鹫峰国家森林公园内的30年生和10年生侧柏林作为代表树种

进行了模拟降雨控制试验

并采用碱液吸收法

对5

20和50 mm降雨量及连续相同频率降雨条件下不同林龄侧柏林的土壤呼吸速率进行了测定。结果表明

林龄对侧柏林的土壤呼吸速率影响有显著差异(p<0.05)。30年生侧柏林的土壤呼吸速率总体上高于10年生侧柏林。与对照组相比5

10和20 mm降雨量对30年生侧柏林的土壤呼吸速率有促进作用

而50 mm降雨量及连续相同频率的降雨对30年生侧柏林土壤呼吸则产生抑制作用。10年生侧柏林与30年生侧柏林相比需水量较小

只有5 mm降雨量条件下对其土壤呼吸速率产生了促进作用

其余模拟降雨量均对其产生抑制作用。

Abstract

A simulated rainfall experiment was conducted to detect the response of forest soil respiration to precipitation change in the Jiufeng National Forest Park

Beijing City. Platycladus orientalis was chosen as the representative tree. Soil respiration rate in different stand ages was measured in conditions of 5

20 and 50 mm rainfall depths and consecutive identical frequency. Results indicated that there was significant variation(p<0.05) in the impact of stand age on soil respiration rate of Platycladus orientalis

and the soil respiration of 30-years-old Platycladus orientalis generally exceed that of 10-years-old. Compared with control group

10 and 20 mm rainfall tests all had auxo-action effects on soil respiration of 30-years-old Platycladus orientalis and 50 mm rainfall and consecutive identical frequency were suppressive on 30-years-old Platycladus orientalis' soil respiration. 10-years-old Platycladus orientalis needed less water than 30-years-old Platycladus orientalis and hence

only 5 mm rainfall could promote soil respiration rate

while the others presented suppressive effect.

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