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Growing high oleic low linolenic (HOLL) oilseed rape for specialised markets

 


HGCA PROJECT REPORT 442

Growing high oleic low linolenic (HOLL) oilseed rape for specialised markets


by
Jim Orson1, Elaine Booth2, Colin Merritt3, Cliff Lea4

1TAG, The Old Rectory, Morley St. Botolph, Wymondham, Norfolk, NR18 9DB
2SAC Aberdeen, Craibstone Farm, Bucksburn, Aberdeen, AB21 9TQ
3Monsanto UK Ltd., PO Box 663, Cambourne, Cambridge, CB1 0LD
4FUCHS Lubricants plc, New Century Street, Hanley, Stoke-on-Trent,
Staffs., ST1 5HU

November 2008

Abstract

The rapeseed oils from HOLL (high oleic and low linolenic) varieties are more suited to some food uses, notably frying oil, and also possibly for biolubricants.

Splendor, the first commercial winter HOLL oilseed rape variety, was sown on six sites in major arable areas in England and Scotland over three years.

Site and season were the most likely causes of variation in fatty acid profiles. The lowest content of the key fatty acid, oleic acid, was consistently found at the Scottish site. Input management had no or little impact on fatty acid profiles. Harvesting a crop before it was completely ripe may result in lower oleic acid content. Commercially, delaying harvest results in a less desirable fatty acid profile.

Oil from Splendor was not directly suitable for the key range of biolubricants and further increases in oleic acid content are required. The desired scale of these increases may only be possible with genetic modification.

Volunteers of previous more conventional crops had minimal effect on the fatty acid profile after a three year break from the previous oilseed rape where cultivations were carried out after harvest to minimise the dormancy of shed seed. This, along with the fact that the ingress of pollen from neighbouring fields has little or no impact on the fatty acid profile of the seed, suggests an opportunity for the UK to grow a significant area of HOLL varieties.

The results show that responses to fungicides are not assured and their use needs to be considered on a field-by-field basis. A malate test early in the season did not reliably predict the sulphur requirement of the current crop at the time S needs to be applied.

 

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