文献类型：期刊文献

英文题名：Characterization of the effects of inter-tree competition on source-sink balance in Chinese pine trees with the GreenLab model

作者：Guo, Hong[1] Lei, Xiangdong[1] Cournede, Paul-Henry[2,3] Letort, Veronique[2,3]

第一作者：国红

通信作者：Guo, H[1]

机构：[1]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China;[2]Ecole Cent Paris, Appl Math & Syst Lab, F-92290 Chatenay Malabry, France;[3]INRIA Saclay Ile de France, EPI Digiplante, Orsay, France

年份：2012

卷号：26

期号：3

起止页码：1057-1067

外文期刊名：TREES-STRUCTURE AND FUNCTION

收录：;EI(收录号：20121914997049);Scopus(收录号：2-s2.0-84860430667);WOS:【SCI-EXPANDED(收录号:WOS:000303470000033)】；

基金：We are grateful to Philippe de Reffye from CIRAD, Montpellier, France for giving helpful advice, and Diao Jun, Rong Jiantao, Liu Xianzhao from Chinese Academy of Forestry (CAF) for their contributions to field observations. The study was supported by Natural Science Foundation of China (No.: 30872022; 31100474) and Zhejiang Tengtou Landscape Co. LTD.

语种：英文

外文关键词：Competition; Secondary growth; Functional-structural plant model calibration; Source-sink balance; Pinus tabulaeformis Carr

摘要：We investigate the characteristics of individual tree response to competition on source-sink balance through the functional-structural plant model GreenLab. Four Chinese pine (Pinus tabulaeformis Carr.) trees were destructively sampled and were divided into two groups: high-density group and low-density group. First, the effects of density on organ dimensions and on organ relative mass were analysed based on experimental measurements. These were primary indicators of the plant response to competition. Second, the hidden parameters of the GreenLab model, as well as a tree-specific characteristic surface, were estimated using the data of total tree biomass for needle and wood compartments, for each of the four trees in parallel. The quality of the fitting is finally validated using data of individual organ mass at shoot level for the sampled branches. The Mann-Whitney Student's t test showed that there were significant differences between the shoot attributes of the two groups for shoot diameter, shoot biomass and needle biomass. No significant difference was found for current year shoot lengths of the two groups. The parametric identification of the model allowed estimating and comparing the amount of biomass that was allocated to primary growth and to secondary growth in the two density conditions. It showed that biomass allocated to secondary growth (ring compartment) was the most strongly affected by density, and that the organ demand satisfaction ratio profiles of each of these trees were a relevant, integrated indicator of the tree state.