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Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition
BACKGROUND: Since available arable land is limited and nitrogen fertilizers pollute the environment, cropping systems ought to be developed that do not rely on them. Here we investigate the rapidly growing, N(2)‐fixing Azolla/Nostoc symbiosis for its potential productivity and chemical composition t...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley & Sons, Ltd
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6099237/ https://www.ncbi.nlm.nih.gov/pubmed/29573358 http://dx.doi.org/10.1002/jsfa.9016 |
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author | Brouwer, Paul Schluepmann, Henriette Nierop, Klaas GJ Elderson, Janneke Bijl, Peter K van der Meer, Ingrid de Visser, Willem Reichart, Gert‐Jan Smeekens, Sjef van der Werf, Adrie |
author_facet | Brouwer, Paul Schluepmann, Henriette Nierop, Klaas GJ Elderson, Janneke Bijl, Peter K van der Meer, Ingrid de Visser, Willem Reichart, Gert‐Jan Smeekens, Sjef van der Werf, Adrie |
author_sort | Brouwer, Paul |
collection | PubMed |
description | BACKGROUND: Since available arable land is limited and nitrogen fertilizers pollute the environment, cropping systems ought to be developed that do not rely on them. Here we investigate the rapidly growing, N(2)‐fixing Azolla/Nostoc symbiosis for its potential productivity and chemical composition to determine its potential as protein feed. RESULTS: In a small production system, cultures of Azolla pinnata and Azolla filiculoides were continuously harvested for over 100 days, yielding an average productivity of 90.0–97.2 kg dry weight (DW) ha(−1) d(−1). Under ambient CO(2) levels, N(2) fixation by the fern's cyanobacterial symbionts accounted for all nitrogen in the biomass. Proteins made up 176–208 g kg(−1) DW (4.9 × total nitrogen), depending on species and CO(2) treatment, and contained more essential amino acids than protein from soybean. Elevated atmospheric CO(2) concentrations (800 ppm) significantly boosted biomass production by 36–47%, without decreasing protein content. Choice of species and CO(2) concentrations further affected the biomass content of lipids (79–100 g kg(−1) DW) and (poly)phenols (21–69 g kg(−1) DW). CONCLUSIONS: By continuous harvesting, high protein yields can be obtained from Azolla cultures, without the need for nitrogen fertilization. High levels of (poly)phenols likely contribute to limitations in the inclusion rate of Azolla in animal diets and need further investigation. © 2018 The Authors. Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. |
format | Online Article Text |
id | pubmed-6099237 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | John Wiley & Sons, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-60992372018-08-23 Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition Brouwer, Paul Schluepmann, Henriette Nierop, Klaas GJ Elderson, Janneke Bijl, Peter K van der Meer, Ingrid de Visser, Willem Reichart, Gert‐Jan Smeekens, Sjef van der Werf, Adrie J Sci Food Agric Research Articles BACKGROUND: Since available arable land is limited and nitrogen fertilizers pollute the environment, cropping systems ought to be developed that do not rely on them. Here we investigate the rapidly growing, N(2)‐fixing Azolla/Nostoc symbiosis for its potential productivity and chemical composition to determine its potential as protein feed. RESULTS: In a small production system, cultures of Azolla pinnata and Azolla filiculoides were continuously harvested for over 100 days, yielding an average productivity of 90.0–97.2 kg dry weight (DW) ha(−1) d(−1). Under ambient CO(2) levels, N(2) fixation by the fern's cyanobacterial symbionts accounted for all nitrogen in the biomass. Proteins made up 176–208 g kg(−1) DW (4.9 × total nitrogen), depending on species and CO(2) treatment, and contained more essential amino acids than protein from soybean. Elevated atmospheric CO(2) concentrations (800 ppm) significantly boosted biomass production by 36–47%, without decreasing protein content. Choice of species and CO(2) concentrations further affected the biomass content of lipids (79–100 g kg(−1) DW) and (poly)phenols (21–69 g kg(−1) DW). CONCLUSIONS: By continuous harvesting, high protein yields can be obtained from Azolla cultures, without the need for nitrogen fertilization. High levels of (poly)phenols likely contribute to limitations in the inclusion rate of Azolla in animal diets and need further investigation. © 2018 The Authors. Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. John Wiley & Sons, Ltd 2018-05-19 2018-09 /pmc/articles/PMC6099237/ /pubmed/29573358 http://dx.doi.org/10.1002/jsfa.9016 Text en © 2018 The Authors. Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Articles Brouwer, Paul Schluepmann, Henriette Nierop, Klaas GJ Elderson, Janneke Bijl, Peter K van der Meer, Ingrid de Visser, Willem Reichart, Gert‐Jan Smeekens, Sjef van der Werf, Adrie Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title | Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title_full | Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title_fullStr | Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title_full_unstemmed | Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title_short | Growing Azolla to produce sustainable protein feed: the effect of differing species and CO(2) concentrations on biomass productivity and chemical composition |
title_sort | growing azolla to produce sustainable protein feed: the effect of differing species and co(2) concentrations on biomass productivity and chemical composition |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6099237/ https://www.ncbi.nlm.nih.gov/pubmed/29573358 http://dx.doi.org/10.1002/jsfa.9016 |
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