Abstract：In this study，effects of humic acid fertilizer on soil urease activity and available nitrogen content，nitrogen absorption of plant，and rhizome yield in ginger growing soil via pond culture．The results showed that in comparison with no fertilizers，the application of equal quantity humic acid could significantly increase soil available nitrogen content，plant nitrogen absorption and rhizome yield，and soil urease activity decreased during the early growing stage，but it increased in the later stage.In comparison with equal quantity treatment of non-organic fertilizers，the application of slow releasing humic acid fertilizer could significantly increase soil urease activity，soil available nitrogen content and plant nitrogen absorption during the later ginger growing stage，and increase rhizome yield by 9.17 %．
