NDLI: Biochemical properties and microbial community structure of five different soils after atrazine addition

Content Provider	Springer Nature Link
Author	Mahía, Jorge González Prieto, Serafin Jesus Martín, Angela Bååth, Erland Díaz Raviña, Montserrat
Copyright Year	2011
Abstract	Atrazine is one of the most used herbicides worldwide; however, consequences of its long-term agricultural use are still unknown. A laboratory study was performed to examine changes in microbial properties following ethylamino-15N-atrazine addition, at recommended agronomic dose, to five acidic soils from Galicia (NW Spain) showing different physico-chemical characteristics, as well as atrazine application history. Net N mineralization was observed in all soils, with nitrate being the predominant substance formed. The highest values were detected in soils with low atrazine application history. From 2% to 23% of the atrazine-15N was found in the soil inorganic-N pool, the highest values being detected after 9 weeks in soils with longer atrazine application history and lower indigenous soil N mineralization. The application of atrazine slightly reduced the amount of soil N mineralized and microbial biomass at short term. Soluble carbohydrates and β-glucosidase and urease activity decreased with incubation time, but were not significantly affected by the single application of atrazine. Microbial community structure changed as consequence of both soil type and incubation time, but no changes in the phospholipid fatty acid (PLFA) pattern were detected due to recent atrazine addition at normal doses. The saturated 17- to 20-carbon fatty acids had higher relative abundance in soils with a longer atrazine history and fungal biomass, as indicated by the PLFA 18:2ω6,9, decreased with the incubation time. The results suggested that the PLFA pattern and soil N dynamics can detect the long-term impact of repeated atrazine application to agricultural soils.
Starting Page	577
Ending Page	589
Page Count	13
File Format	PDF
ISSN	01782762
Journal	Biology and Fertility of Soils
Volume Number	47
Issue Number	5
e-ISSN	14320789
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-04-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atrazine N mineralization Enzyme activities Phospholipid fatty acid pattern Soil Science & Conservation Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Microbiology

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