Effects of two apple rootstocks on the soil microecology of replanted apple orchard soil

Apple replant disease (ARD) seriously restricts the development of the apple industry. It is of great significance for the sustainable development of the apple industry to alleviate ARD by using rootstock resistance. Taking M9T337 and Malus robusta Rehd. as test materials, the differences in biomass, soil physical and chemical properties, soil enzyme activity, soil microbial metabolic activity and carbon source utilization characteristics, soil microbial quantity, and soil fungal community of two apple rootstocks in replanted soil. The results showed that the biomass, related soil enzyme activities, and AWCD metabolic activity of apple saplings with Malus robusta Rehd. as rootstock were better, the number of soil fungi and the copy number of four Fusarium genes were lower, and more beneficial bacteria were enriched. In conclusion, the apple saplings with Malus robusta Rehd. as rootstock have a better improvement effect on the replanted soil environment and are more suitable as rootstocks to prevent and control ARD than M9T337.