CO_2 and H_2O gas-exchanges of trees in changeable environments

多变环境下树木的CO_2和H_2O气体交换

• 批准号: 07456071
• 负责人: HAGIHARA Akio
• 金额: $ 3.39万
• 依托单位: University of the Ryukyus (1997)Nagoya University (1995-1996)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07456071/
• 关键词: Chamaecyparis obtusa; elevated CO_2; Temperature coefficient; Respiration; Photosynthesis

The effect of elevated atmospheric CO_2 concentrations on the nighttime respiration were examined for two sample branches of a hinoki cypress (Chamaecyparis obtusa (Sieb.et Zucc.) Endl.) tree growing in the field with an open gas exchange system. The branches were of a similar size and located at a similar position within the crown. One branches was subjected to ambient air which had a CO_2 concentration of about 370 mu mol mol^<-1>. The nighttime respiration rate was higher in elevated CO_2 level than in ambient CO_2 level. The relationship between hourly nighttime respiration and the corresponding nighttime air temperature was fitted with the exponential function in every month. The segregation of the regression lines between the two CO_2 treatments increased gradually as the season progressed. The Q_<10> values for nighttime respiration were lower in elevated CO_2, i.e.1.9 to 3.7, than in ambient CO_2, i.e.2.4 to 4.5 in every month. The Q_<10> was inversely related to the monthly mean nighttime air temperature in both elevated and ambient CO_2. The estimated daily dark respiration rate showed a similar seasonal pattern in both CO_2 treatments, which almost synchronized with the temperature change. The respiration ratio of elevated CO_2 to ambient CO_2 increased gradually from 1.0 to 1.5. The present results indicated that the CO_2 level and the temperature have a strong interactive effect on respiratory activities.

以扁柏（Chamaaparis obtusa（Sieb. et Zucc.）Endl.）树木生长在一个开放的气体交换系统领域。这些树枝大小相似，位于树冠内的相似位置。一个分支经受具有约370 μ mol/L的CO_2浓度的环境空气<-1>。夜间呼吸速率在CO_2浓度升高时高于环境CO_2浓度。各月夜间呼吸与夜间气温的关系均为指数函数。两种CO_2处理间回归线的分离度随季节的推移逐渐增大。夜间呼吸的Q值<10>在CO_2浓度升高时为1.9 ~ 3.7，而在大气CO_2浓度升高时为2.4 ~ 4.5。在<10>CO_2浓度升高和大气CO_2浓度升高的情况下，Q_2与月平均夜间气温呈负相关。两种CO_2处理下暗呼吸速率的日变化趋势基本一致，与温度变化基本同步。大气CO_2浓度升高时，土壤呼吸速率与大气CO_2浓度的比值从1.0逐渐增大到1.5。结果表明，CO_2浓度和温度对呼吸活动有很强的交互作用。

项目成果

Hagihara, A.: "The Size-Dependence curve as a generalized Competition-Density curve" Japanese Journal of Planning. 24. 15-23 (1995)

Hagihara, A.：“作为广义竞争密度曲线的规模依赖性曲线”日本规划杂志。

Mori, S.and Hagihara, A.: "Branch respiration in hinoki [Chamaecyparis obtusa (Sieb.et Zucc.) Endl.] trees, with reference to branch positions within tree crowns." Bull.Nagoya Univ.For.14. 25-34 (1995)

Mori, S. 和 Hagihara, A.：“扁柏 [Chamaecyparis obtusa (Sieb.et Zucc.) Endl.] 树的分支呼吸，参考树冠内的分支位置。”

Adu-Bredu, S., Yokota, T.and Hagihara, A.: "Temperature effect on maintenance and growth respiration coefficients of young, field-grown hinoki cypress (Chamaecyparis obtusa)." Ecol.Res.12. 357-362 (1997)

Adu-Bredu, S.、Yokota, T. 和 Hagihara, A.：“温度对田间种植的年轻扁柏 (Chamaecyparis obtusa) 的维持和生长呼吸系数的影响。”

Adu-Bredu,S.: "Tree size dependence of litter production,and above-ground net production in a young hinoki(Chamaecyparis obtusa)stand" Journal of Forest Research. 2. 31-37 (1997)

Adu-Bredu,S.：“树木大小对凋落物产量的依赖性，以及年轻扁柏（Chamaecyparis obtusa）林地的地上净产量”《森林研究杂志》。

Adu-Bredu,S.: "Temperature effect on maintenance and growth respiration coefficients of young,field-grown hinoki cypress(Chamaecyparis obtusa)" Ecological Research. 12. 357-362 (1997)

Adu-Bredu,S.：“温度对幼年田间种植的扁柏（Chamaecyparis obtusa）的维持和生长呼吸系数的影响”生态研究。