To improve the water and fertilizer utilization efficiency of bubbled-root irrigation

the indoor infiltration experiment was conducted to explore the bubbled-root irrigation wetting front movement and soil moisture and nitrogen distribution rules at different fertilizer solution concentration criteria. Results showed that same infiltration time

with the increase of the fertilizer concentration

the wetting front migration distance and the soil water content at the same location in the wet body and the mass fraction of ammonium nitrogen and nitrate nitrogen increased. The relationship between wetting front migration distance and infiltration time was a power function and the coefficient of determination reached 0.99. With the distribution of fertilizer solution infiltration

wet body achieved a sense of stability

uniform moisture content distribution

moisture content of peak position went down gradually. The amount of ammonium nitrogen decreased gradually and the maximum value of nitrate nitrogen was reached in 5 d moist body. Nitrate nitrogen migration regularity and moisture was consistent

along with the moisture loss. The above research results could lay the foundation for further research on efficient bubbled-root irrigation technology of using water and nitrogen.