Combining measurements of characteristics of root architecture with underground water transport models.
Abstract
Root phenotyping tools have been used to measure various characteristics of root system architecture, development and function. These measurements enable the parameterization of simulation models to obtain information about root growth and water and nutrients transport in the soil which cannot be measured directly. With this information the impacts of water and nutrient uptake within the rhizophere, root system and plant can be predicted and explored.
This work has combined Hydrus-1D with a 3D root architecture model. The root architecture model provides the depth of root system over time to the Hydrus model. These depths define the root zone, which has given parameters such as hydraulic conductivity, water capacity and sink parameters appropriate to characteristics of root systems. Outside the root zone, the parameters are that of the soil, without a sink term. Combined, a region composed of roots embedded in a soil is created. Since this is a 1D simulation, the simulated 3D root systems are condensed to a 1D occupancy representation as a function of depth. Hydrus-1D is then run using inputs and parameters from the root system, soil and weather to predict water and nutrient uptake. With this coupled simulation tool we aim to gain a better understanding the relationships of root phenotypes and traits in the context of elite breeding material to help further define specific growth and physiological processes within root systems to target and explore as future product concepts.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.H43K2617C
- Keywords:
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- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCESDE: 0496 Water quality;
- BIOGEOSCIENCESDE: 1879 Watershed;
- HYDROLOGYDE: 1880 Water management;
- HYDROLOGY