EFFECT OF RECLAMATION AND RESTORATION ON SOIL MICROBIAL COMMUNITY STRUCTURES IN COLD REGION WETLAND

To understand the impact of reclamation and restoration on soil microbes and the corresponding soil biogeochemical processes in cold region wetland, an experiment was established that included two cultivated treatments (upland fields of soybean cultivation and paddy fields of rice cultivation), two restored treatments (with meadow and forest wetland of agricultural abandonment). Changes in soil properties and microbial communities across the different treatments were analyzed. The results showed the following: (1) The contents of SOC, TN, and TP and the Shannon diversity, Ace and Chao1 index of a wetland park nature reserve in the cold region were higher than those of the upland and paddy fields. (2) The diversity and abundance of bacterial communities in reclaimed soils was slightly different from that of restored wetland soils. Actinobacteria, Acidobacteria, Proteobacteria, Chloroflexi and Firmicutes were the predominant bacteria. (3) Some soil physicochemical properties are significantly correlated with the main bacteria in the soil, the environmental factor of AP, TP, AK, TK, TN and SOC driven by reclamation and restoration modes effect the structure microbial community.

Automated summary

In this experiment, the impact of reclamation and restoration on soil microbes and biogeochemical processes in cold region wetlands was investigated. Different treatments, including cultivated and restored wetlands, were analyzed for changes in soil properties and microbial communities. The results showed higher contents of SOC, TN, and TP, as well as higher diversity indices, in the wetland nature reserve compared to upland and paddy fields. The dominant bacterial phyla in the reclaimed and restored soils were Actinobacteria, Acidobacteria, Proteobacteria, Chloroflexi, and Firmicutes. The structure of microbial communities was influenced by environmental factors driven by reclamation and restoration modes, such as AP, TP, AK, TK, TN, and SOC.