Summary
Field experiments were conducted to assess the effects of the application of P on growth and N yield of inoculated and indigenous blue-green algae (BGA). Addition of 17.4 kg P ha−1 in split applications led to the highest BGA biomass and N yield, 162 kg dry weight ha−1 and 6 kg N ha−1 per 15 days, respectively. When inoculum of Aulosira spp., Aphanothece spp., Gloeotrichia spp. were compared separately, Gloeotrichia spp. grew faster but Aulosira spp. fixed more N. The growth rate and N yield of Aulosira spp. decreased with high P applications, although growth continued until the application of 34.8 kg P ha−1. The effects of P on inoculum production by local species compared with those collected from other states showed the superiority of the local culture. Applications of P also enhanced the growth and N yield of indigenous BGA, with Wollea spp. showing the best results.
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Bisoyi, R.N., Singh, P.K. Effect of phosphorus fertilization on blue-green algal inoculum production and nitrogen yield under field conditions. Biol Fert Soils 5, 338–343 (1988). https://doi.org/10.1007/BF00262143
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DOI: https://doi.org/10.1007/BF00262143