NDLI: Development and evaluation of an organically certifiable growth medium for cultivation of cyanobacteria

Content Provider	Springer Nature Link
Author	Barminski, Rosalyn Storteboom, Heather Davis, Jessica G.
Copyright Year	2016
Abstract	On-farm cultivation of phototrophic, N-fixing cyanobacteria, grown in raceway ponds, could provide organic farmers an alternative N source to meet crop fertilizer needs. The application of cyanobacterial fertilizer in certified organic agriculture requires a growth medium of certified organic ingredients. This study compared growth and N-fixation of cyanobacteria cultured in two media, Allen and Arnon (AA) and a growth medium of organic-approved ingredients (RB) developed by the authors. A xenic culture of Anabaena sp. was grown for 2 weeks in the laboratory. The RB medium had significantly lower concentrations of P, Fe, B, Zn, and Cu than the AA medium. Cyanobacteria grown in RB had significantly greater exponential growth rate but significantly lower net total Kjeldahl nitrogen (TKN) than those grown in AA. In a follow-up replicated field study, the xenic culture of Anabaena sp. was inoculated into raceways aerated by paddle wheels. There was no significant difference in exponential or linear growth rate between the two treatments though the RB medium had lower concentrations of P, Co, Zn, and B than the AA medium. The lack of difference could be the result of an overarching limiting factor evident in both treatments such as light or C depletion or that the lower nutrient concentrations in RB were still sufficient for growth and N-fixation. There was no difference in net TKN between the two treatments, suggesting similar rates of N-fixation. Since bone meal contributed trace amounts of N to the RB media, it is possible that maximal N-fixation was not achieved. However, RB medium was able to support growth similar to that of the AA medium in raceway cultivation.
Starting Page	2623
Ending Page	2630
Page Count	8
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	28
Issue Number	5
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-05-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cyanobacteria Fertilizer Biofertilizer Media comparison Raceway N-fixation Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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