Abstract
NERICA(New Rice for Africa) has been evaluated as drought tolerant and expected to play a key role for increasing rice production in Africa. To evaluate drought and salinity tolerance for NERICA in terms of parameter values in a root water uptake model, we carried out irrigation experiment in a chamber. Two NERICA were planted in lysimeter equipped with three TDR probes. The plants were imposed to water (drought) stress and salinity stresses. Parameter values were determined by minimizing the sum of square difference between measured and calculated daily transpiration amounts. Results showed that NERICA is not more tolerant to drought stress than Toyohatamochi, a Japanese upland rice. Also, NERICA was found to be slightly less tolerant to salinity stress than Toyohatamochi.
