Chemical Composition of Different Varieties of Linseed
M. Laiq Khan*, M. Sharif, M. Sarwar, Sameea1
and M. Ameen
Institute of
Animal Nutrition and Feed Technology, University of
Agriculture,
Faisalabad, 1Government Islamia
College,
Faisalabad,
Pakistan
*Corresponding author:
drlaiqkhan@gmail.com
Abstract
The present study was conducted to investigate
chemical composition of six varieties of linseed (Chandni, LS-29, LS-49, LS-70,
LS-75 and LS-76). Proximate composition, mineral profile and cyanogenic
glycosides (linamarin) were determined. Average proximate composition values for
linseed i.e. crude protein, ether extract, crude fiber, ash and nitrogen free
extract were 24.18, 37.77, 4.78, 3.50 and 25.86%, respectively. Higher values of
crude protein, ether extract, crude fiber and nitrogen free extract were
observed in varieties LS-49, LS-70, LS-29 and Chandni, respectively. Average
mineral contents in linseed i.e. Ca, Mg, K, Na, Cl, P, Cu, Fe, Mn and Zn were
0.39, 0.09, 1.41, 0.05, 0.08, 0.89, 4.67, 50.56, 8.29 and 13.55 ppm,
respectively. Among micro minerals, varieties LS-29 and LS-70 were higher in Cu
contents; LS-75 was higher in Fe content, while LS-49 was higher in Mn and Zn
contents. Among macro minerals, level of Ca was higher in LS-70, levels of Mg, K
and Na were higher in Chandni, while P was higher in LS-49. Average amount of
linamarin in linseed was 31.05mg/100 gm DM. The variety LS-75 had the highest
(35.22 mg/100 gm) linamarin content, while variety LS-70 had least (26.22 mg/100
gm) amount of linamarin. In conclusion, there is significant difference in
chemical composition among linseed varieties. The varieties LS-49 showed higher
crude protein content, LS-70 showed greater oil content, while LS-75 had higher
content of linamarin.