Among feeding stuffs from home-grown oilseeds,
linseed and hemp cake are of very low importance,
sharply contrasting with the rapeseed meal, solvent
extracted, and rapeseed cake in connection with the
‘‘biodiesel boom’’ mentioned above. However, all
three seeds are important as a side-product of oil
extraction in smaller presses. In a given region, producing
the seed, oil and cake, then feeding the cake
and using the animal manure as fertilizer may ‘‘close
the circle’’ of sustainability for the environment and
climate.
Objectives of this study were to press the seeds
from rape, linseed and hemp in the same screw press
and to test the respective cakes in an experiment
with laying hens. Besides the laying intensity and egg
quality parameters, the fatty acid composition of egg
yolk had to be investigated.