To investigate the biological fixation in the application of low cadmium contaminated soil and in-situ utilization of rice safe production

this study adopts the pot experiment to compare and analyze the impact of arbuscular mycorrhizal fungi (AMF) on rice growth and seed cadmium content under low cadmium contamination conditions. The results showed that under the conditions of low cadmium contamination

rice and AMF formed a good symbiotic relationship

and the mycorrhizal dependency index of the host rice reached 120.43%. AMF infection can promote the expansion of the underground plant organs

and increase the adsorption capacity of roots. With AMF infection

the vegetative growth indicators

including rice plant height

root length

ratio of root to shoot

were higher than non-infected rice plants

especially the ratio of root to shoot increased up to 22.37%. Therefore

inoculum can significantly increase the rice nutrition biomass. Compared with the blank control group

the yield of rice seed increased by 12.61%. With the application of the mocrobial inoculim

the soil cadmium content threshold for ational food safety standards of rice seed increased from 0.20 mg/kg to 0.32 mg/kg

which guaranteed the in situ utilization of the low cadmium contaminated soil and the production safety of rice.