Abstract: To investigate the effects of the combined application of controlled-release fertilizer, organic fertilizer, and microbial inoculant on growth of Amorphophalms konjac, a study was conducted using the common local practice of applying farm compound fertilizer alone as a control. The comprehensive effects of their combination on the physiology, yield, quality of the Amorphophalms konjac variety Anmo 128, and the soil environment were studied. The results showed that compared with the control, the activities of superoxide dismutase and peroxidase, the contents of soluble protein, soluble sugar and free proline in the leaves of Amorphophalms konjac treated with controlled release fertilizer+organic fertilizer+microbial agent (NOM) were significantly increased, while the contents of H₂O₂ and malonaldehyde were significantly decreased. The combined fertilization treatments significantly increased tuber yield and improved bulb quality of Amorphophalms konjac. Specifically, the NOM treatment significantly increased the total yield of corms and stolons and the number of disease-free and pest-free corms by 35.9% and 40.5%, respectively, compared to the control. The cellulose content, glucomannan content, and viscosity also significantly increased by 75.6%, 22.3%, and 16.5%, respectively. Furthermore, the treatment of NOM significantly increased the available potassium and organic matter content in the Amorphophalms konjac rhizosphere soil by 5.5% and 13.4%, respectively, and significantly enhanced the activities of soil catalase, urease, and dehydrogenase by 276.7%, 121.4%, and 72.0%, respectively, compared to the control. The comprehensive evaluation showed that the treatment of NOM had the highest score, indicating that it had the best synergistic effect on the yield and quality of Amorphophalms konjac.

Key words: Amorphophalms konjac, Anmo 128, controlled-release fertilizer, organic fertilizer, microbial inoculant, physiological metabolism, yield, quality