Shandong Science ›› 2021, Vol. 34 ›› Issue (3): 80-89.doi: 10.3976/j.issn.1002-4026.2021.03.012

• Environment and Ecology • Previous Articles     Next Articles

Effect of silver nanoparticles on soil enzyme activity and functional diversity of microbial communities in wheat-straw-returned soil

CAO Xin-lei1, JIANG Hao1,2, YANG Bao-shan1, JIAO Ke-qin1, WANG Hui1*   

  1. 1. School of Water Conservancy and Environment, University of Jinan, Jinan 250022,China;2. Shandong Academy for Environmental Planning, Jinan 250101, China
  • Received:2020-10-13 Online:2021-06-20 Published:2021-06-07

Abstract: An indoor cultivation system was used to study the environmental impact of nano silver on various soil characteristics, such as soil respiration, carbon-conversion-related enzyme activities, and functional diversity of microbial community. The experimental sample was set as blank control boil (untreated,CK), wheat-straw-returned soil(SW), nano silver amended soil (AgSW). The results showed that when compared with blank control soil, wheat-straw-returned soil had increased the soil respiration rate, cumulative release of CO2 was increased by 9.9%. Further, nano-silver amendment inhibited soil respiration in comparison with wheat straw treatment, and cumulative release of CO2 was reduced by 36.8%, the activities of peroxidase, polyphenol oxidase, and cellulase were considerably reduced highest by 25.1%, 27.1%, and 14.3%, respectively. The results of microbial community level physiological characteristics revealed that nano silver significantly reduced the average well color development(AWCD (reduced by 73.8% compared with SW) as well as microbial diversity and richness. The results show that nano silver alters the ecological process of soil organic matter decomposition by inhibiting soil microbial activity and reduces the functional diversity of microbial communities.

Key words: nano silver, wheat-straw-returned soil;soil respiration, soil enzymes;functional diversity of microbial communities

CLC Number: 

  • X53