The effects of integrated rice-duck farming technology on rice roots were studied. The results showed that the growth quality of rice roots was markedly improved in the integrated rice-duck farming ecosystem because of the mechanical stimulation due to duck activities. Compared with the conventional rice farming, the root activity, the total absorbing surface area and active absorbing surface area of rice roots were increased by 4.76%-72.54%, 9.16%-32.07%, 0.93%-55.31%, respectively. The volume, dry mass, total absorbing surface area/volume ratio of rice roots and rice root/shoot ratio at middle-late stages were enhanced to some extent too. This indicated that rice-duck farming had positive effects on postponing rice root aging and improved the physiological activity, growth and development of the plants.