Heat Treated Rapeseed Meal for Animal Nutrition

Heat Treated Rapeseed Meal for Animal Nutrition

In 2015 Pure Oil NZ conducted a research project to determine how to increase the value of its rapeseed meal (canola meal) for the New Zealand dairy industry.

It was found that a high shear extruder followed by a resident cook period would increase the by-pass protein content within the canola meal, which is a desired factor of the high producing New Zealand dairy farmer.

Pure Oil NZ's heat treatment presents the protein in "right" form for the dairy cow and the residual fat levels in the meal provide much needed energy, the combination of these two elements produces excellent milk production capability.

Where can it be used?


Dairy Production


Dairy Calves

beef feedlot

Beef Feedlots


Key Benefits

Increased milk production

The undegraded canola protein (or "bypass") fraction is the critical as it supplies essential amino acids for absorption in the small intestines which lifts milk production levels.

Increased energy

It provides a significant energy advantage in the form of sugars and residual oil which are not fermented as quickly in the ruminant after heat treatment. The digestibility of fibre (ADF and NDF) is improved after extrusion process, encouraging microbial activity in the ruminant.


Another outcome of the extrusion process is the improvement of the taste of the meal to cows and particularly calves. Sugars and fats are reacted under heat reduce bitterness and improve the flavour.

Pure Oil NZ creates by-pass protein by adding controlled amounts of heat and cook time to the canola meal. This added heat denatures the amino acids and changes the digestibility of the overall protein.

Extrusion (high pressure + high shear) is an effective means to increase by-pass protein. During the extrusion process temperatures are elevated and the moisture within the meal encourages the chemical reaction of amino acids to take place (denaturisation). A conditioner holds the extruded meal for a control period, prolonging the denaturisation process and thereby increasing by-pass protein levels.


NutrientUnitHT Canola
Moisture % 6-7
Crude Protein % 34-38
Oil % 9-13
Crude Fibre % 11
ADF % 22
NDF % 26
Ash % 6

Amino acid content

NutrientUnitHT Canola
Glutamic % 18
Cysteine % 3.2
Methionine % 2
Lysine % 6
Threonine % 4.4

Mineral content

NutrientUnitHT Canola
Calcium % 0.6
Phosphorus % 1.0
Magnesium % 0.5
Potassium % 1.2

Protein & energy for dairy

NutrientUnitHT Canola
Crude Protein % 34-38
Rumen Bypass
% >32
ME MJ/kg DM 13.5

Get in touch

Nick Murney
Managing Director
Ph. +64 27 556 2314
Email. nick.murney@pureoilnz.co.nz

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