吉林大学学报（理学版）2017，Vol.55Issue(4)：1031-1036,6.DOI:10.13413/j.cnki.jdxblxb.2017.04.44
纳米TiO2对土壤中自生固氮菌活性的影响
Effect of Nano-TiO2 on Activity of Azotobacter in Soil
摘要
Abstract
By potting experimental method,we studied effect of nano-TiO2 on the activity of Azotobacter in sandy soil,black soil and peaty soil.The results show that nano-TiO2 inhibit the activity of Azotobacter in different types of soil,and the order of inhibition is sandy soil>black soil>peaty soil.The inhibitory rate of Azotobacter increases with the increase of the dosage of nano-TiO2 at different doses (0.5,1.0,2.0 g/kg) in sandy soil and peaty soil.2.0 g/kg nano-TiO2 are added to sandy soil and peaty soil,and the inhibition ratio reaches the maximum at the 15th day,25.73% and 12.76% respectively.After planting of alfalfa in three soils,the rhizosphere effect and root exudates can indirectly reduce the inhibitory effect of nano-TiO2 on Azotobacter.The difference is extremely significant between the planted group and the unplanted group (P<0.01) in the black soil and peaty soil,and the difference is significant between the planted group and the unplanted group (P<0.05) in the sandy soil.关键词
纳米TiO2/土壤/自生固氮菌/抑制作用Key words
nano-TiO2/soil/Azotobacter/inhibition分类
资源环境引用本文复制引用
郭平,孙影,李琳慧..纳米TiO2对土壤中自生固氮菌活性的影响[J].吉林大学学报（理学版）,2017,55(4):1031-1036,6.基金项目
辽河源头区水污染综合治理技术及示范项目(批准号:2012ZX07202-009). （批准号:2012ZX07202-009）
