Estimating the parameters of a 3-D root distribution function from root observations with the trench profile method: case study with simulated and field-observed root data
Estimating the parameters of a 3-D root distribution function from root observations with the trench profile method: case study with simulated and field-observed root data
复制标题
使用沟槽剖面方法根据根部观测估计 3D 根部分布函数的参数：使用模拟和现场观测的根部数据进行案例研究
DOI：
10.1007/s11104-013-1942-3
复制
发表时间：
2013
期刊：
影响因子：
4.9
通讯作者：
J. Diels
中科院分区：
文献类型：
--
作者：
Joachim Vansteenkiste;J. V. Loon;S. Garré;L. Pagès;E. Schrevens;J. Diels
根长密度（RLD）是一个很难测量的参数，但对估计植物的水分和养分吸收至关重要。在这项研究中，提出了一种新的方法来表征的3-D根长分布补充数据的3-D分布的根交叉点与根长密度的数据从有限数量的土壤core.MethodsThe方法进行了评估，在虚拟实验中使用RootTyp模型和花椰菜（甘蓝L。botrytis）和韭菜（Allium porrum，L.）。结果虚拟实验结果表明，该方法能准确地估计出植物的总根长和根长分布。该方法在田间试验中的实施是成功的表征菜花和韭菜的根分布随时间的增长。与虚拟实验相比，总根长不能估计根交叉测量field.ConclusionsThe新方法相结合的根交叉数据与根长密度数据从核心样品是一个强大的工具，以供应根系吸水模型与根系信息。
Background and aimsRoot length density (RLD) is a parameter that is difficult to measure, but crucial to estimate water and nutrient uptake by plants. In this study a novel approach is presented to characterize the 3-D root length distribution by supplementing data of the 3-D distribution of root intersections with data of root length density from a limited number of soil cores.MethodsThe method was evaluated in a virtual experiment using the RootTyp model and a field experiment with cauliflower (Brassica oleracea L. botrytis) and leek (Allium porrum, L.).ResultsThe virtual experiment shows that total root length and root length distribution can be accurately estimated using the novel approach. Implementation of the method in a field experiment was successful for characterizing the growth of the root distribution with time both for cauliflower and leek. In contrast with the virtual experiment, total root length could not be estimated based upon root intersection measurements in the field.ConclusionsThe novel method of combining root intersection data with root length density data from core samples is a powerful tool to supply root water uptake models with root system information.