| This study investigated the effects of different microbial agents on soil properties and the yield of potato through field experiments, focusing on changes in soil available nutrients and soil enzyme activities caused by M1 microbial agents, M2 microbial agents, and M3 Bacillus megaterium. The results showed that microbial agents had positive effects on soil nutrient content and soil enzyme activity. The content of available nutrients in the soil at different growth stages of potato was highest with the omnipotent microbial agent, followed by the potassium-dissolving microbial agent. Soil enzyme activities initially increased and then decreased as the growth period progressed. The enzyme activities induced by the M1 and M2 microbial agents were higher compared to the control group (CK), showing statistical significance. Compared with CK, the three microbial agents increased potato yield by 15.99%, 8.44%, and 7.58%, respectively. Positive correlations were observed among soil enzyme activities, soil available nutrients, and potato yield. Specifically, catalase, alkaline nitrogen, and available phosphorus were significantly correlated with potato yield. In summary, the application of microbial agents effectively increases soil nutrient content, enzyme activity, and potato yield, with M1 microbial agents showing the most significant improvement. |
