Eurasian Journal of Soil Science

Volume 6, Issue 2, Apr 2017, Pages 106-113
DOI: 10.18393/ejss.286539
Stable URL: http://ejss.fess.org/10.18393/ejss.286539
Copyright © 2017 The authors and Federation of Eurasian Soil Science Societies



Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils

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Zhang ,D., Wu ,Y., Zhang ,X., Zhu ,Y., 2017. Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils. Eurasian J Soil Sci 6(2):106-113. DOI : 10.18393/ejss.286539
Zhang ,D.Wu ,Y.Zhang ,X.,& Zhu ,Y. (2017). Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils Eurasian Journal of Soil Science, 6(2):106-113. DOI : 10.18393/ejss.286539
Zhang ,D.Wu ,Y.Zhang ,X., and ,Zhu ,Y. "Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils" Eurasian Journal of Soil Science, 6.2 (2017):106-113. DOI : 10.18393/ejss.286539
Zhang ,D.Wu ,Y.Zhang ,X., and ,Zhu ,Y. "Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils" Eurasian Journal of Soil Science,6(Apr 2017):106-113 DOI : 10.18393/ejss.286539
D,Zhang .Y,Wu .X,Zhang .Y,Zhu "Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils" Eurasian J. Soil Sci, vol.6, no.2, pp.106-113 (Apr 2017), DOI : 10.18393/ejss.286539
Zhang ,Dongdong ;Wu ,Yunli ;Zhang ,Xiaolin ;Zhu ,Youfeng Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils. Eurasian Journal of Soil Science, (2017),6.2:106-113. DOI : 10.18393/ejss.286539

How to cite

Zhang , D., Wu , Y., Zhang , X., Zhu , Y., 2017. Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils. Eurasian J. Soil Sci. 6(2): 106-113. DOI : 10.18393/ejss.286539

Author information

Dongdong Zhang , MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzho, China
Yunli Wu , MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzho, China
Xiaolin Zhang , MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzho, China
Youfeng Zhu , Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, College of Environmental and Resource Sciences, Zhejiang University, Hangzho, China

Publication information

Article first published online : 24 Oct 2016
Manuscript Accepted : 14 Oct 2016
Manuscript Received: 17 Jun 2016
DOI: 10.18393/ejss.286539
Stable URL: http://ejss.fesss.org/10.18393/ejss.286539

Abstract

Persistence of the fungicide myclobutanil in three tea orchard soils with different cultivating ages, neighboring wasteland and forest soils, and its influence on microbial activities in 2- and 50-year-oldtea orchard soils at three rates were studied in the laboratory. Dissipation data fitted well to first-order kinetic equation, except for sterilized treatments, in which neglected dissipation of myclobutanil was observed. At 25oC, the dissipation half-lives (DT50) at level of 1mg kg-1 were in the range of 15.07-69.32 days under non-flooded condition, significantly lower than flooded condition (p < 0.05), indicating that dissipation of myclobutanil was mainly driven by soil microorganisms under aerobic condition. Dissipation rate was significantly increased at 40oC compared to those at 4oC and 25oC for all five soils (p < 0.05). Under all incubation conditions, DT50 were lowest in 50-year-old tea orchard soil (p < 0.01). Correlation analysis between DT50 in tea orchard soils and soil properties showed that soil microbial biomass carbon was negatively correlated with DT50 under 25oC and 60% water holding capacity (p < 0.05). In general, soil microbial biomass carbon and dehydrogenase activity decreased as the concentration of myclobutanil and incubation time increased except 0.1 mg kg-1 spiked soils, in which soil dehydrogenase activity was stimulated after 10 days incubation.

Keywords

Myclobutanil, tea orchard soil, dissipation kinetic, soil microbial biomass, microbial activity.

Corresponding author

References

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Abstract

Persistence of the fungicide myclobutanil in three tea orchard soils with different cultivating ages, neighboring wasteland and forest soils, and its influence on microbial activities in 2- and 50-year-oldtea orchard soils at three rates were studied in the laboratory. Dissipation data fitted well to first-order kinetic equation, except for sterilized treatments, in which neglected dissipation of myclobutanil was observed. At 25oC, the dissipation half-lives (DT50) at level of 1mg kg-1 were in the range of 15.07-69.32 days under non-flooded condition, significantly lower than flooded condition (p < 0.05), indicating that dissipation of myclobutanil was mainly driven by soil microorganisms under aerobic condition. Dissipation rate was significantly increased at 40oC compared to those at 4oC and 25oC for all five soils (p < 0.05). Under all incubation conditions, DT50 were lowest in 50-year-old tea orchard soil (p < 0.01). Correlation analysis between DT50 in tea orchard soils and soil properties showed that soil microbial biomass carbon was negatively correlated with DT50 under 25oC and 60% water holding capacity (p < 0.05). In general, soil microbial biomass carbon and dehydrogenase activity decreased as the concentration of myclobutanil and incubation time increased except 0.1 mg kg-1 spiked soils, in which soil dehydrogenase activity was stimulated after 10 days incubation.

Keywords: Myclobutanil, tea orchard soil, dissipation kinetic, soil microbial biomass, microbial activity.



Eurasian Journal of Soil Science