Development of 3D Root Architecture Models for Tree Species

测定树根系统中的碳是资源密集型的，需要新的工具来理解和描述地下过程。细根一直是许多研究的重点，但占树木地下碳根生物量大部分的结构性树根系统却知之甚少。在过去的10年里，3D树根建筑模型得到了迅速的发展，特别是在欧洲。NSERC的这项提议的目标是为萨斯喀彻温省北部针叶林中的杰克松开发3D建筑根模型。来自北方平原和北方盾牌地区的杰克松树将被挖掘出它们的根系，并使用FasTrak单元使用3D数字化仪绘制每个根的地图。数字化数据(位置、直径等)将在AMAPmod中使用，以创建可以分析各种根特征和根生物量的3D建筑根模型。这些数据还将用于另外两个模型FracRoot和Root Typ，这两个模型可以进行参数化，以预测结构性根的生长和生物量。该项目具有新颖性，因为它将为加拿大的研究人员提供预测结构性根发育的新工具，这些工具可用于应对与气候变化、碳封存和林木遗传改良有关的新挑战。这些树木根系的3D结构模型还将有助于更好地预测根C固存，可用于生态系统规模的C模型，如碳收支模型(CBM-CFS3)。据我所知，这将是第一次在加拿大对北方树种的粗木质根部结构的3D模型进行评估。

Determining carbon in tree roots systems is resource intensive and new tools are needed to understand and describe belowground processes. Fine roots have been the focus of much research but structural tree root systems which account for the majority of belowground carbon root biomass in trees are poorly understood. In the last 10 years there has been a rapid development in 3D tree root architecture models, especially in Europe. The objective of this NSERC proposal is to develop 3D architectural root models for jack pine in the boreal forest in Saskatchewan. Jack pine trees from the Boreal Plains and Boreal Shield regions will have their root systems excavated and each root mapped with a 3D digitizer using a Fastrak unit. The digitized data (location, diameters etc) will be used in the AMAPmod to create 3D architectural root models that can be analyzed for various root characteristics and root biomass. The data will also be used in two other models FracRoot and Root Typ that can be parameterized to predict structural root growth and biomass. This project is novel in that it will provide researchers in Canada with new tools for predicting structural root development that can be used to address the emerging challenges related to climate change, C sequestration and genetic improvements in forest trees. These 3D architecture models of tree root systems will also aid in better prediction of root C sequestration that can be used in ecosystem scale C models such as the Carbon Budget Model (CBM-CFS3). This will be the first study to my knowledge in Canada where 3D models of coarse woody root architecture for boreal tree species will be assessed.