Regulation of disparate potato cultivation patterns on rhizosphere bacterial communities influence chemical properties of soil

In agroecosystems, the implementation of disparate cropping patterns has been observed to elicit alterations in soil chemical properties and microbial communities, which in turn influence crop growth. However, the mechanism of soil microbial environment with different potato cultivation patterns remains unclear in the black soil area of Northeast China, a significant region for potato cultivation. Therefore, the soil chemical properties and diversity and composition of soil bacterial communities of 4 kinds of potato cultivation patterns, including no cultivation, maize-potato rotation, short-term potato continuous cropping, and long-term potato continuous cropping, were analyzed. The results indicated that the levels of available phosphorus, available potassium, and pH were the highest in long-term continuous cropping soil and exhibited a positive correlation with beneficial bacterial genera, including Gemmatimonadaceae , KD4-96, MND1, Subgroup_6 , and RB41 . However, the contents of soil available phosphorus and potassium were the second most abundant in no-cultivation soil and also positively correlated with Gemmatimonadaceae, KD4-96, and MND1 . The abundance of beneficial microorganisms, including Sphingomonas , Gemmatimonas , and Candidatus_Udaeobacter reached its maximum in soil subjected to short-term continuous cropping, followed by maize-potato rotation and exhibited a minimum in soil subjected to long-term continuous cropping. In conclusion, changes in soil microbial community composition and the availability of phosphorus, potassium and pH were observed to be regulated by different cropping systems. This was achieved by influencing the changes in the beneficial dominant flora in the rhizosphere soil of potatoes, which were also regulated by the feedback.