Report from Lawrence Berkeley National Laboratory on the mechanisms of Actagro product - Proximus (AWD2725)

Technical Report · Wed Dec 04 00:00:00 EST 2019

DOI:https://doi.org/10.2172/1574245· OSTI ID:1574245

Brodie, Eoin L.  ^[1]; Polussa, Alexander ^[1]; Chakraborty, Romy  ^[1]; Xia, Mingqian ^[1]; Bouskill, Nicholas ^[1]; Bill, Markus ^[1]

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1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Under a collaborative research and development (CRADA) agreement, LBNL scientists investigated the effect of the semi-humic substance, Proximus, on nitrogen dynamics in two contrasting soils. We specifically tested four hypotheses that Proximus (1) binds ammonium and reduces nitrification; (2) does not bind ammonium but chemically inhibits nitrification; (3) stimulates microbial immobilization of N in biomass; (4) stimulates denitrification. We performed two primary experiments, one in the laboratory using a pure culture of a nitrifying bacterium, and one in a greenhouse setting testing the fate of nitrogen and response of microbial communities in soils with and without Proximus.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fisker, Inc., Manhattan Beach, CA (United States); Actagro, LLC, Fresno, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER)
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1574245
• Report Number(s): LBNL-2001243; LBNL-2001243
• Country of Publication: United States
• Language: English