Mathias Neumann Andersen

Crop growth and two dimensional modeling of soil water transport in drip irrigated potatoes

Research output: Contribution to book/anthology/report/proceedingConference abstract in proceedingsResearch

  • Department of Agroecology and Environment
  • Soil physics and Soil resources
  • Climate and Bioenergy
Drip irrigation can be an effective way to improve water and nitrogen use efficiency in soil and hence to reduce the environmental pollution. In the EU project SAFIR (http://www.safir4eu.org/) a potato experiment was carried out in lysimeters on three different soil types: coarse sand, loamy sand and sandy loam. An automatic roof was used to exclude the lysimeters from natural precipitation. The potatoes were drip irrigated following different strategies: Fully irrigated (FI), deficit irrigation (65% FI), and partial root zone drying (PRD). Gas exchange measurements were carried as well as sampling of abscisic acid (ABA). Model outputs from the mechanistic simulation model Daisy, in SAFIR developed to include 2D soil processes and gas exchange processes based on Ball et al. and Farquhar were compared with measured crop dynamics, final DM yield and volumetric water content in the soil measured by TDR probes. The probes were installed parallel to the tillage direction at different positions in the potato ridge. The new Daisy 2D model showed to be able to simulate crop growth, water use and soil water distribution fairly well
Original languageEnglish
Title of host publicationInternational Annual Meetings of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America : Models and Model Processes
Publication year2009
Publication statusPublished - 2009
EventInternational Annual Meetings of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America - Pittsburgh, Pennsylvania, United States
Duration: 1 Nov 20095 Nov 2009

Conference

ConferenceInternational Annual Meetings of the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
LandUnited States
ByPittsburgh, Pennsylvania
Periode01/11/200905/11/2009

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