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Report no. 561By
Hanne Maribo
José A. Fernández
27.06.2002
Lupin Prima as protein source for organic finishers
Abstract
The aim of this trial was to examine the effect of adding 15%
lupin Prima to organic finisher feed. This diet was compared with
an organic diet with peas and rape and with a non-organic finisher
diet. The trial was carried out in a herd with 350 finishers (28-98
kg) allocated to 18 blocks. The National Committee for Pig
Production studied production results and health. The Danish
Institute of Agricultural Sciences carried out digestibility trials
of lupin, and the Danish Meat and Research Institute carried out
analyses of the meat and eating quality. The project was financed
partly by funds from the Danish Directorate for Food, Fisheries and
Agri Business.
There was generally good agreement between the calculated and the analysed content of energy and crude protein. The crude protein concentration was 0.5 and 1 percentage units higher in the organic diet with peas and rape and the diet to which lupin had been added compared with the non-organic finisher diet. This is due to fact that it is not allowed to add free amino acids to organic feed and thereby the crude protein content must be increased to be able to meet the standards for essential amino acids. The content of alkaloids in lupin Prima was 350 mg/kg and exceeded the recommended maximum content of 300 mg/kg. There were no differences between the groups in the secondary parameters: mortality, treatments for disease or texture of faeces. The iodine number in the fat was in all three groups above the recommended limit of 70 despite the fact that only the organic diet with peas and rape exceeded the marginal value of iodine number product. Overall, the trial showed that the highest productivity was reached with the non-organic finisher diet and the organic diet to which lupin had been added. There were no differences between the organic diet to which lupin was added and the organic diet with rape and peas. Lupin Prima can therefore be used as a realistic alternative to the existing protein sources. The overall nitrogen discharge (N) was highest in the organic pigs compared with pigs given non-organic finisher feed. All in all, it can be concluded that lupin in fact is an alternative protein source for organic pig feed as it does not give rise to any disadvantages in terms of production or quality. |
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