Alfalfa modified the effects of degraded black soil cultivated land on the soil microbial community

• DOI: 10.3389/fpls.2022.938187
• Publication Date: 2022-08-19T07:14:26Z
• Authors: Linlin Mei; Na Zhang; Qianhao Wei; Yuqi Cao; Dandan Li; Guowen Cui
• Keywords: Gemmatimonadetes; Acidobacteria

Legume alfalfa (Medicago sativa L.) is extensively planted to reduce chemical fertilizer input the soil and remedy damaged fields. The mechanism of these effects potentially related variations in alfalfa-mediated interactions microbial community. To understand impact planting on community degraded black cultivated land, a 4-year experiment was conducted land. We assessed parameters characterized functional compositional diversity by amplicon sequencing that targeted 16S rDNA gene bacteria ITS fungi four systems under corn cultivation at Harbin demonstration base (Heilongjiang, China): multiyear (more than 30 years, MC1); 2 years alfalfa-corn rotation (OC); 3 (TA); 4 (FA). It found out led changes alpha rather arable abundance bacterial groups Gemmatimonadetes, Actinobacteria, Planctomycetes, Chloroflexi increased OC, while Proteobacteria Acidobacteria fungal group Glomeromycota were TA FA. TA, FA significantly pH level but reduced electrical conductivity, they had no available nitrogen potassium 0-15 cm depth. However, with planting, 15-30 phosphorus total There significant made nitrogen. organic matter Planting land can salt content soil, nutrient without fertilization equivalent annual fertilization. Besides, recruited contained taxa capacity improve utilization inhibit harmful influences pathogens for subsequent crops. Meanwhile, modify conditions promoting proliferation specific beneficial microbiota groups.