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OJVRTM
Online
Journal of Veterinary Research©
Volume 20(8):540-546, 2016.
Effect
of air, oven and solar drying on nutrient values of fish feedstuffs
Mamman T, Ipinjolu JK,
Shamsuddeen BK, Jibrin H
and Mohammed U2
1Department of
Fisheries and Aquaculture, Usmanu Danfodiyo
University, 2School of Agricultural Technology, Sokoto
State polytechnic, Sokoto Nigeria
ABSTRACT
Mamman T, Ipinjolu JK, Shamsuddeen BK, Jibrin H and Mohammed U2., Effect of air, oven and solar drying on nutrient values of fish feedstuffs, Onl J Vet Res., 20(8):540-546, 2016. Effect of air, oven and solar drying on nutritional content of horse radish (Moringa oleifera), water lily (Pistia stratiotes), and soy bean (Glysine max) is reported. Soy bean was boiled 30 min at 1000C to reduce the effect of trypsin. Samples were dried in triplicate and nutritional values determined for dried and fresh samples. Moisture of fresh M. oleifera was 65% and P. stratiotes leaves 85.7% being higher than fresh G. max (2.67%). Best crude protein values for M. oleifera leaves was 23.97+0.26%, P. stratiotes 22. 50+0.35% and G. max 39.21+0.23% were obtained by oven drying. Results suggest that P. stratiotes and M. oleifera leaves are good sources of minerals and carbohydrate, but moderate protein. Boiled and dried soybeans had low mineral and carbohydrate content but higher lipid and protein. Crude lipid was significantly higher in sun dried samples for all feedstuffs. Oven dried samples had the least ash, crude fiber and nitrogen free extract. We conclude that samples should not be sun dried but air or oven dried. Soybeans could be used as a source of protein in fish feed formulation. Results suggested that a moderate oven temperature of 700C for drying was effective in moisture removal best retention of crude protein.
Key words: Fish feedstuffs, nutrients,
processing, drying methods.