Modeling potato root growth and water uptake under water stress conditions

摘要: a b s t r c Potato (Solanum tuberosum L.) is considered drought sensitive crop. Accurate simulation of root growth critical for estimating water uptake dynamics. However, data required to build and test advanced potato approaches lacking. Previously unpublished from our soil-plant-atmosphere- research (SPAR) chambers was used evaluate new two-dimensional diffusive module linked the existing model SPUDSIM. The consisted parameters control- ling direction in horizontal vertical directions, an additional convective term within soil. This modified SPUDSIM tested against observed SPAR which distribution soil profile organ dry weights (DW) at harvest, plus daily patterns each six different irrigation treatments. difference between simulated DW two standard errors most plant organs—root over-predicted well-watered plants. Spatial temporal contents were reproduced well. tended over-estimate layers closer surface. Differences among treatments result fluctuations status, bulk density, density which, turn, affected amount carbon allocated roots value term. These results suggest will provide more reliable predictions improved agricultural decision support tools. © 2014 Elsevier B.V. All rights reserved.