Journal of Food, Agriculture and Environment

Vol 10, Issue 1,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Nutrient profiles of brown marine algae (Sargassum dentifebium) as affected by different processing methods for chickens


M. A. Al-Harthi *, A.A. El-Deek

Recieved Date: 2011-10-11, Accepted Date: 2012-01-07


The aim of this research was to evaluate the nutritional value of brown marine algae (BMA) as affected by different processing methods as a feedstuff for chicken diets. Brown marine algae (Sargassum dentifebium) were cultivated from Jeddah Red Sea shore. BMA was first sun-dried (SBMA) at average day temperature of 40°C until constant weight. Then, a part of the SBMA was processed by boiling (BBMA) in water (1 algae at 45°C for 4 water) for 20 min. Another part of SBMA was processed by autoclaving (ABMA) under 115 bar/inc for 15 minutes. The BBMA and ABMA were then air-dried at 45°C for 48 h until constant weight. Brown marine algae contained protein (7.54-7.77%), crude fat (0.41-0.47%), crude fibre (7.77-7.90%), ash (47.15-48.31%), nitrogen free extract (29.95-31.38%) and soluble sugars (1.666-1.880%) whereas the metabolizable energy (ME) value was 1523-1543 kcal/kg. Nature detergent fibre ranged from 27.95 to 30.21%, acid detergent fibre ranged from 21.18 to 23.54% and hemolcelullose from 6.41 to 7.73% whereas tannins ranged from 0.733 to 0.815 mg/gm protein. Mineral contents of BMA were Ca (0.126-0.144%), P (0.239-0.255%), Na (4.01-4.05%), Zn (215-345 ppm), Mn (216-270 ppm), I (12.72-13.51 ppm), Fe (11.2-11.5 ppm) and Cu (4.6-4.81 ppm). Valine (0.94-1.03%), leucine (0.88-0.96), agrinine (0.71-0.77%) and therionine (0.63-0.74%) were the most abundant essential amino acids (EAAs) in BMA processed by different methods. The contents of EAAs were 0.17-0.25%, 0.23-0.35% and 0.30-0.40% for methionine, methinione with cystine and lysine. The saturated fatty acids (SFA) were 32-54-35.90%, monounsaturated fatty acids (MUFA) were 35.79-37.02%, polyunsaturated fatty acids (PUFA) represented 27.77-30.43% and unsaturated fatty acids (UFA) were 64.10-67.46%. The SFA:UFA ratio was 0.482-0.560. It was concluded that BMA had a valuable nutrient profiles and could be used as a feed resource for poultry feeding.


Brown marine algae, protein quality, amino acids, fatty acids, minerals

Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 1
Category: Agriculture
Pages: 475-480

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