In the thesis, the study was conducted to determine the effects of humic acid (HA) compound fertilizer on iron adsorption, nutrient release of soil, nutrient utilization, soil fertility and the growth of grape (Kyoto). In addition, the physiological mechanism of HA compound fertilizer promoting the growth of grape was researched, which included superoxide dismutase (SOD) activity, peroxidase (POD), chlorophll contents, stomatic diffuse resistance and transpiration rate. The simulated test, soil culture and ...