Two-dimensional model of Populus euphratica root water uptake in extremely arid region of China

To study the water uptake by Populus euphratica root is of significance for the maintenance and regeneration of P. euphratica and other plants in extremely arid region. Based on the measurements at Ejina Banner,Inner Mongolia of North China,the root system distribution of P. euphratica and the soil moisture content in P. euphratica root zone were analyzed,and a two-dimensional model of P. euphratica root water uptake was built. The mean relative error value between measured and simulated values was 9.02%,and the maximum relative error value was 17.84%,suggesting that the built model better reflected the water uptake by P. euphratica root,being available in further studying the SPAC of P. euphratica.