Functional relation of the whole-tree CO_2 exchange to tree size

全树CO_2交换与树大小的函数关系

• 批准号: 03454073
• 负责人: HAGIHARA Akio
• 金额: $ 3.39万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03454073/
• 关键词: Functional relation; Whole-tree; CO_2 gas-exchange; Photosynthesis; Respiration; Size dependence; Critical size; Growth process; 自然間引き; 暗呼吸; 林木個体; 二酸化炭素交換; 光合成; 林木; 個体レベル; 野外; 機能のサイズ依存性

The whole-tree CO_2 gas-exchange was measured on five sample trees in a 19-year-old hinoki (Chamaecyparis obtusa) stand, using an open gas-exchange system. The measurement for each sample tree was kept on a 10-day run a month.The annual gross photosynthetic production by a tree, p, decreased with decreasing stem volume, v. The relationship was successfully expressed in the following generalized power function :*where g, h, and v_<min> are coefficients. Equation 1 implies that p decreases abruptly near the critical tree size, v_<min>, below which trees can not survive. In the light of the fact that the value of the exponent h was about 2/3, p is approximately proportional to the surface area in larger-sized trees.On the other hand, the annual respiratory consumption by a tree, r, was proportional to p, i.e.,*where the proportional constant k of 0.38 meant that r accounts for about 40% of p, regardless of tree size.Assuming Eqs.1 and 2 results in the following equation :*where g' is equal to k^.g. The observed data were well fitted with Eq.3.

采用开放式气体交换系统，对19年生扁柏林5株样木进行了全树CO_2气体交换的测定。每株样树每月连续测定10天，年光合生产总量p随树干体积v的减小而减小，其关系可用下列广义幂函数表示：* 式中g、h和v<min>为系数。方程1意味着p在临界树尺寸v_附近突然减小，低于该临界树尺寸v_<min>，树不能存活。根据指数h的值约为2/3的事实，在较大的树木中，p近似与表面积成正比。另一方面，树木的年呼吸消耗r与p成正比，即，其中，比例常数k为0.38意味着r占p的约40%，而与树的大小无关。观测数据与方程3拟合良好。

项目成果

横田岳人: "立木状態におけるヒノキ林木の呼吸量測定" 日林論. 102. 523-524 (1991)

横田岳人：“柏树站立状态呼吸率的测量”Nichibayashi Ron. 102. 523-524 (1991)

Hagihara, A.and Hozumi, K.Respiration.: "In Physiology of Trees (Ed.Raghavendra, A.S.)" John Wiley & Sons, Inc., New York. 87-110 (1991)

Hagihara, A. 和 Hozumi, K. 呼吸：“树木生理学（Ed. Raghavendra，A.S.）” John Wiley

Akio Hagihara: "CO_2 exchange rate at the level of individual trees of hinoki cypress(Chamaecyparis obtusa (Sied.et Zucc.)Endl.)." XV Int.Bot.Cong.(1993)

Akio Hagihara：“扁柏 (Chamaecyparis obtusa (Sied.et Zucc.)Endl.) 单棵树水平上的 CO_2 汇率。”

横田岳人: "成長期における個体サイズの異なるヒノキ個体のCO_2交換" 日林中支論. 41. 59-62 (1993)

横田学人：“生长期间不同大小的柏树个体之间的CO_2交换” Nichibayashi Chushinron 41. 59-62 (1993)。

Paembonan,S.A.: "Long-term measurement of CO_2 release from the aboveground parts of a hinoki forest tree in relation to air temperature." Tree Physiol.8. 399-405 (1991)

Paembonan,S.A.：“长期测量扁柏林树地上部分 CO_2 释放量与气温的关系。”