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Evaluation of seaweeds from marine waters in Northwestern Europe for application in animal nutrition
- Source :
- Animal Feed Science and Technology 263 (2020), Animal Feed Science and Technology, 263
- Publication Year :
- 2020
-
Abstract
- The increasing demand for animal protein by the growing world population intensifies the exploration of novel feed sources. This study evaluated the nutritional value of six intact seaweed species (i.e. the brown species Saccharina latissima, Laminaria digitata, and Ascophyllum nodossum, the red species Palmaria palmata, and Chondrus crispus and green species Ulva lactuca), collected from the coast of Ireland, Scotland and France as an ingredient for animal feed. The nutrient composition, in vitro digestibility, and in vitro gas production simulating rumen fermentation, were determined. The nutrient contents (g/kg dry matter), both between and within species, were highly variable, ranging from 45–248 for crude protein, 351–691 for non-starch polysaccharides, and 173–445 for ash. Overall, the brown seaweeds had the highest non-starch polysaccharides content, whereas samples of the red and green seaweeds had an amino acid content up to 265 g/kg dry matter. All samples had a substantial non-protein nitrogen fraction, varying from 0.12–0.29 of nitrogen. The fibre fractions of brown seaweeds showed different properties than land-based plants, as illustrated by a lower analysed neutral detergent fibre than acid detergent fibre content. The ileal organic matter and nitrogen digestibility, as well as the total tract organic matter digestibility (mean digestibility coefficients: 0.81, 0.89 and 0.88, respectively) were lower for all seaweeds compared to soybean meal (digestibility coefficients: 0.84, 0.98 and 0.97, respectively). S. latissima, L digitata, P. palmata and U. lactuca had a higher maximum gas production than alfalfa, but lower than sugar beet pulp. Based on the protein content and amino acid-pattern, intact P. palmata and U. lactuca would be a valuable protein source for farm animals, with the high non-starch polysaccharides and non-protein nitrogen contents and a low in vitro digestibility potentially limiting their use as a feed ingredient for monogastric species. The fermentability of L. digitata, S. latissima and P. palmata indicate that these intact seaweeds may have a higher nutritional value in ruminants. The high ash content in all seaweed species hampers the use of intact seaweed for both ruminants and monogastrics. Extraction of protein and other favourable components, while reducing the ash content, seems an important step towards seaweed inclusion in animal diets. Further identification and characterisation of seaweed polysaccharides is required to understand and improve the digestibility of seaweed fractions.
- Subjects :
- Animal Nutrition
030309 nutrition & dietetics
Soybean meal
Chemical composition
Saccharina latissima
03 medical and health sciences
Gas production
Chondrus crispus
Dry matter
Food science
In vitro digestibility
0303 health sciences
biology
Chemistry
0402 animal and dairy science
04 agricultural and veterinary sciences
biology.organism_classification
Laminaria digitata
Seaweed
040201 dairy & animal science
Diervoeding
Palmaria palmata
WIAS
Animal Science and Zoology
Ulva lactuca
Animal feed
Ascophyllum
Subjects
Details
- Language :
- English
- ISSN :
- 03778401
- Volume :
- 263
- Database :
- OpenAIRE
- Journal :
- Animal Feed Science and Technology
- Accession number :
- edsair.doi.dedup.....99c04d2a60666c2c67552bad6942e624
- Full Text :
- https://doi.org/10.1016/j.anifeedsci.2020.114460