Effects of applying bio-organic fertilizer on water retention and bacterial community of dryland red soil
Soil drought is a key bottleneck restricting agricultural production in China.Applying bio-organic fertilizers(BF)can effectively increase soil organic matter content,improve soil physicochemical properties,and promote crop growth.However,its effects on water retention and bacterial community of dryland red soil is rarely reported.Therefore,this study explored the impact of BF application on soil water retention by measuring the dynamic changes of soil water content under different application amounts,moreover,bacterial community was analyzed by high-throughput sequencing technology.The results showed that the effect of applying BF on soil water retention was different due to the difference of application amount and simulated drought period.When the application amount was 1％and the simulated drought period was 31 days,soil water content was 1.8 times than that of the CK.The application of BF significantly increased the content of soil organic matter and available nitrogen,available phosphorus,and available potassium,and it was increased with the increase of application amount.The application of BF significantly affected the composition and diversity of soil bacterial community.Compared with CK,the relative abundance of Proteobacteria,Bacteroidetes,Acidobacteria,and Actinobacteria in soil was increased,and Firmicutes was decreased,moreover,the bacterial diversity was increased significantly under BF application(P＜0.05).The application of BF significantly increased the relative abundance of Lysobacter,Ramlibacter,and Sphingomonas in the soil in arid environments,however,the relative abundance of Bacillus was decreased,which was related to the changes in bacterial habitats caused by fertilization.Therefore,our study suggested that proper application of BF could be an effective measure to cope with seasonal soil drought and regulate bacterial community.
bio-organic fertilizersoil drought stresssoil water contentbacterial community
万方数据
维普
