Die Bodenkultur - Journal for Land Management, Food and Environment

T. Soevik:

Faults in feeds and mills


Discrepancies between analysed (a) and guaranteed (g) crude protein (CP) in Norwegian feed mixes were studied.

There was a significant (p < 0.001) inverse relationship between the ratio alg and gCP (10 %-45 %) in 3963 samples from 17 mills during 3.5 years. 2.12 % of the samples had CP content outside the statutory range. 19 % of these faulty samples had CP in excess, 81 % were deficient. Fault frequency (ff) regressed versus gCP: fT =-3.55 + 0.36 X gCP; was highly significant (p =0.015). The total frequency of faults dropped from more than 3 % to less than 1 % during the surveyed period (p =0.034). There was no significant (p =0.936) linear relationship between the frequency of faults and localisation of the mills in six agricultural efficiency zones.

Key words:  protein, feed mixes, farmed animals, quality, discrepancies.