NDLI: High surface area biochar negatively impacts herbicide efficacy

Content Provider	Springer Nature Link
Author	Graber, E. R. Tsechansky, L. Gerstl, Z. Lew, B.
Copyright Year	2011
Abstract	Amendment of soil by biochar may reduce efficacy of soil-applied herbicides due to sorption. Bioassays with Green Foxtail (Setaria viridis) tested the influence of two biochars on phytoavailability of S-metolachlor and sulfentrazone under biochar amendment of 0, 13, 26 and 52 Mg ha$^{-1}$.Adsorption of both herbicides was an order of magnitude greater on a high specific surface area (SSA) biochar (EUC-800; SSA 242 m$^{2}$ g$^{-1}$) than on a low SSA biochar (BC-1; SSA 3.6 m$^{2}$ g$^{-1}$). Herbicide doses near the lowest recommended label rates controlled the weed at 13 and 26 Mg ha$^{-1}$ of BC-1; sulfentrazone was also effective at 52 Mg BC-1 ha$^{-1}$. These same herbicide doses controlled weed germination and development only at 13 Mg ha$^{-1}$ of EUC-800; at herbicide doses near the highest label rates, weed control was also achieved at 26 Mg EUC-800 ha$^{-1}$, but not at 52 Mg EUC-800 ha$^{-1}$.Increased doses of soil-applied herbicides cannot necessarily offset decreases in herbicide phytoavailability in biochar-amended soils, particularly if the biochar has a high SSA. Considering the long half-life of biochar in soil, pest control needs will be best served by low SSA biochars.
Starting Page	95
Ending Page	106
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	353
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-10-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochar Herbicide Sorption Bioassay Foxtail Metolachlor Sulfentrazone Efficacy Phytoavailability Weed protection Isotherm Non-linear Adsorption Plant Sciences Plant Physiology Soil Science & Conservation Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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