Linseed Expeller

Introduction

Linseed is the seed of the flax plant and is grown for its oil which is used in paints, inks, soaps etc. Oil is either expelled or extracted from the seed which is made up of approximately 39% oil. The meal can sometimes be pressed into lozenge shaped pellets for easier transportation. The whole seed is not widely used.

Origin

Europe, America, Argentina and China.

Nutritional Information

It is a high energy oil, available carbohydrates, and of mid-protien, but low in limiting amino acids. The oil present is high in polyunsaturated fatty acids eg. linolenic acid. Linseed is reputed to aid bloom in coat condition and, with large amounts fed, milk fat content can be reduced, but so too may overall digestibility of the ration. A good source of digestible fibre and a palatable feed. It is low in calcium and lysine. Whole linseed has been fed on farm after treatment with caustic soda and water. It is claimed that this whole oilseed, coated in sodium bicarbonate ensures oil digestion bypasses the rumen and takes place in the intestine.

Colour/Texture

Brown flakes, pellets or chips.

Palatability

Good.

Limits on Usage

May contain glucoside or linamarin and the enzyme linase which will release prussic acid if processed at low temperatures. High levels will have a laxative effect, and result in soft carcass fat. Can have an undesirable softening effect on butterfats and taint milk if fed in large quantities. Can be fed up to 3kg/day to cattle and 1kg/day to pigs. Toxic to poultry except in very small proportions.

Recommended Maximum Inclusion Rates %

Calf 7.5 Creep 0 Chick 0 Dairy 20 Weaner 0 Broiler 0 Beef 20 Grower 0 Breeder 2.5 Lamb 7.5 Finisher 10 Layer 2.5 Ewe 20 Sow 5

Handling/Storage

Often processed to form lozenges (small cakes) and to destroy toxic compounds.