摘要
以性质差异较大的长期施用猪粪或鸡粪的土壤(黄壤、红壤和石灰土)为对象,通过批量平衡试验和填装土柱试验,研究了土著抗生素耐性菌在土壤中的吸附与迁移行为。结果表明:Freundlich模型能良好拟合所有供试土壤中抗生素耐性菌的等温吸附过程,施用鸡粪土壤中的吸附容量常数(KF)高于施用猪粪土壤中;作为一种生物胶体,抗生素耐性菌在水饱和土柱中的迁移速度比水分快;抗生素耐性菌在不同类型土壤中的穿透率表现为:黄壤>红壤>石灰土,以土壤机械组成的影响最大;在黄壤和红壤中,抗生素耐性菌迁移速度在不同粪肥间的差异表现为:猪粪>鸡粪,而在石灰土中不同粪肥间的差异却相反。抗生素耐性菌在土柱淋洗阶段也会发生明显的迁移,这种现象在施用猪粪土壤中比在施用鸡粪土壤中更为明显。可见,抗生素耐性菌的迁移行为受土壤性质和粪肥种类的共同影响。
In this study,batch and reconstructed soil column experiments were conducted to examine the sorption and transference of antibiotic resistance bacteria(ARB)in three different soils(red soil,yellow soil,and calcareous soil)with long-term application of pig or chicken manure,which exhibited contrasting properties.It was found that the Freundlich model was fitted satisfactorily to isothermal sorption process of ARB in all experimental soils,with the sorption capacity(KF)being higher in soils amended by chicken manure than amended by pig manure.As a biocolloid,ARB transferred faster in the soils than water.Breakthrough recoveries of ARB in different soils followed the order of yellow soil>red soil>calcareous soil,with soil texture exerting the greatest impact.In yellow and red soils,greater ARB transferring occurred under pig manure amendment than under chicken manure amendment;however,an opposite difference was observed in calcareous soil.At the leaching stage,a significant transferring of ARB was also evidenced,which was more significant in soils amended by pig manure than amended by chicken manure.In conclusion,ARB transferring in soil is affected by both soil properties and manure type.
作者
赵海帆
唐翔宇
程建华
陈朝济
ZHAO Haifan;TANG Xiangyu;CHENG Jianhua;CHEN Zhaoji(National Laboratory for Development and Utilization of Forest Food Resources,College of Forestry and Biotechnology,Zhejiang A&F University,Hangzhou 311300,China)
出处
《土壤》
北大核心
2025年第5期1099-1106,共8页
Soils
基金
浙江省自然科学基金项目(LD21D010001)
国家自然科学基金项目(42177379,42377374)资助。
关键词
土壤
粪肥
抗生素耐性菌
吸附
迁移
Soil
Manure
Antibiotic resistance bacteria
Sorption
Transfer
