Effects of intercropping forage rape with Sudan grass on soil enzyme activity and bacterial community structure in the irrigation areas along the Yellow River
To explore the effects of intercropping of forage rape and Sudan grass on soil enzyme activity and bacterial community structure in the Yellow River irrigation area,high-throughput sequencing technology was used in Dalate Banner,Ordos City,Inner Mongolia in 2022,combining with soil enzyme activity.The differences of soil bacterial community structure and enzyme activity under three planting modes of monoculture of forage rape,mono-culture of Sudan grass and intercropping of forage rape and Sudan grass were compared and analyzed.The results showed that the activities of soil urease and sucrase were significantly increased by 8.09％～13.93％and 13.01％～58.02％,respectively in the intercropping of forage rape and Sudan grass compared with the monoculture of forage rape and Sudan grass.The intercropping of forage rape and Sudan grass increased the number of soil bacterial OTUs and bacterial community diversity index.The composition and relative abundance of soil bacterial communities under different planting patterns were different.Proteobacteria,Bacteroidota,Actinobacteriota,and Gemmatimona-dota were the dominant phyla,and Salinimicrobium,Marinobacter,and Gramella were the dominant genera.The intercropping planting pattern increased the relative abundance of Proteobacteria,Actinobacteriota,Gemmatimona-dota,and Gramella.Correlation analysis showed that soil urease and sucrase were significantly positively correlated with Proteobacteria and significantly negatively correlated with Acidobacteria.Soil alkaline phosphatase was signifi-cantly positively correlated with Bdellovibrionota,and negatively correlated with Actinobacteria.There was a signifi-cant positive correlation between soil catalase and Bdellovibrionota,and a significant negative correlation with Firmi-cutes.In summary,the intercropping of forage rape and Sudan grass changed the soil bacterial community structure and increased the soil enzyme activity and the abundance of beneficial bacteria species,which could be used as an effective measure to improve the saline-alkali soil micro-ecological environment in the Yellow River irrigation area.
intercroppingforage rapeSudan grassenzyme activitybacterial community
万方数据
维普
