Evaluating the effects of phytoremediation with biochar additions on soil nitrogen mineralization enzymes and fungi
- 105 Downloads
Phytoremediation with biochar addition might alleviate pollutant toxicity to soil microorganism. It is uncertain to what extent biochar addition rate could affect activities of enzymes related to soil nitrogen (N) mineralization and alter fungal community under the phytoremediation. This study aimed to reveal the effects of Medicago sativa L. (alfalfa) phytoremediation, alone or with biochar additions, on soil protease and chitinase and fungal community and link the responses of microbial parameters with biochar addition rates. The alfalfa phytoremediation enhanced soil protease activities, and relative to the phytoremediation alone, biochar additions had inconsistent impacts on the corresponding functional gene abundances. Compared with the blank control, alfalfa phytoremediation, alone or with biochar additions, increased fungal biomass and community richness estimators. Moreover, relative to the phytoremediation alone, the relative abundances of phylum Zygomycota were also increased by biochar additions. The whole soil fungal community was not significantly changed by the alfalfa phytoremediation alone, but was indeed changed by alfalfa phytoremediation with 3.0% (w/w) or 6.0% biochar addition. This study suggested that alfalfa phytoremediation could enhance N mineralization enzyme activities and that biochar addition rates affected the responses of fungal community to the alfalfa phytoremediation.
KeywordsMedicago sativa L. Biochar Protease Chitinase Fungal biomass and community
We sincerely thank the support from the Griffith University Ph.D. scholarships and from the Science Fund for Distinguished Young Scholars of Jiangsu Province, China (no. BK20150049).
- Williams TD, Diab AM, George SG, Godfrey RE, Sabine V, Conesa A, Minchin SD, Watts PC, Chipman JK (2006) Development of the GENIPOL European flounder (Platichthys flesus) microarray and determination of temporal transcriptional responses to cadmium at low dose. Environ Sci Technol 40:6479–6488CrossRefGoogle Scholar
- Zhang M, Bai SH, Zhang Y, Yang M, Teng Y, Xu Z (2018) Combined effects of Medicago sativa L and biochar on the remediation of soils co-contaminated by heavy metal and organic fungicide: pollutant removals and bacterial properties. Geoderma (Submitted)Google Scholar
- Zheng J, Chen J, Pan G, Liu X, Zhang X, Li L, Bian R, Cheng K, Jinwei Z (2016) Biochar decreased microbial metabolic quotient and shifted community composition four years after a single incorporation in a slightly acid rice paddy from southwest China. Sci Total Environ 571:206–217CrossRefGoogle Scholar