2012

arvalis

For the past 3 years, ARVALIS - Institut du végétal has studied the energy and nitrogen value of 18 co-products obtained from ethanol production sites, one of these is MILUREX BE®...

MILUREX BE® is obtained from Roquette's Beinheim plant (67). It comes in a dried pellet form. Its moderate protein content (21% of dry matter) can be explained by the gluten extraction procedure, performed prior to alcoholic fermentation and distillation.
 

Its value in use was also studied in a fattening test conducted on young Charolais cows at the Jaillère station (44).
MILUREX BE® is credited with a good energy value: 83.7% dOMv, 1.14 UFL/kgDM and 1.12 UFV/kgDM. This is approximately 10% better than the calculation based on chemical composition (on INRAtion -Prévalim).
This value is close to the mean observed for all wheat fibres (1.08 to 1.23 UFL), if one excludes the measurements made on over-heated samples (0.95 UFL).
Moreover, no relationship was observed between energy value variations and chemical composition variations.
 

Concerning the protein value, the fraction of PDIN in the CP of MILUREX BE® is 62% (i.e. a PDIN value of 132 g/kg/DM). This value is very similar to the mean, established at 61% of the CP (56 to 69%).
Its PDIE value is 48% of the CP (103 g/kg/DM), thus placing it in good position in the range of observed values (21 to 52% of CP).
 

In young Charolais cows, a dry ration containing MILUREX BE® combined with dried beet pulp (2/3 - 1/3) was compared to a control ration composed of cereals (48% wheat and 27% maize), canola cake (17%) and beet pulp (5%).
The cereals/canola cake ration offered good performance, both in terms of ADG (1027 g carcass/day) and of food utilization (7.49 kg/DM/kg carcass gain). The ration containing MILUREX BE® also enabled good growth (1036 g carcass/day). As DM consumption was higher (+8.3%) however, food utilization was less efficient (8.04 kgDM/kg carcass gain) than that of the control batch.
An economic approach shows a feed cost balancing out at a MILUREX BE® price slightly higher than that of cereals.
It should also be noted that, with only 15% starch, this "concentrated" ration poses less of a risk of acidosis for animals; indeed, these animals ate a little less straw.
 

Energy value variability in pigs of wheat and triticale from the 2009 harvest, predicted from the dOMv
 

dOMv: In vitro digestibility of organic matter; Mn: Mean; sd: standard deviation; DE-EQ11: Digestible Energy in pigs predicted from the dOMv using the equation proposed by Jaquelin-Peyraud and Noblet (2003)

The dOMv of the 2009 wheat harvest is of 91.0% on average
(Fig. 1). This value is slightly higher than that obtained for wheat from the 2008 harvest (90.2%) and similar to that reported by Boisen and Fernandez (1997) for 7 batches of wheat (91.4%).

dOMv variability is relatively high as the difference between extremes is of 3 points. This difference represents 144 kcal/kgDM of digestible energy (DE). The dOMv of the most highly represented varieties, however, varies little, i.e. on average 91.4% (Apache), 90.7% (Caphorn), 91.1% (Premio), 91.5% (Sankara) and 90.6% (Mercato).

The digestibility values of organic matter (dOM) and of energy (dE), along with the digestible energy (DE), estimated from the equations of Jaguelin-Peyraud and Noblet (2003), are on average 91.0%, 88.8% and 4045 kcal/kgDM respectively.
The dOM and dE are very similar to the values given in the INRA- AFZ, 2004 tables for growing pigs (90 and 88% respectively).

The DE value, on the other hand, is approximately 230 kcal/kgDM higher than the mean value reported in the tables.

The energy value of wheat varieties, estimated in vitro, is relatively stable from one year to the next as, on average, the maximum deviation over the 4 years is 52 kcal/kgDM (Fig. 3).

The dOMv of the 2009 triticale harvest is 89.7% on average (Fig.2). This value is similar to that observed in 2008 (89.3%) and slightly lower than that reported by Boisen and Fernandez (1997) for 5 batches of triticale (90.7%).

The dOMv of the most highly represented varieties varies on average between 88.5 and 90.6% respectively for the Bellac and Triskell varieties, with consequently a DE deviation between these 2 varieties of 100 kcal/kgDM.

The energy values (dOM, dE and DE) estimated from the dOMv, are respectively on average 89.8%, 87.6% and 3976 kcal/kgDM. The dOM and dE are relatively similar to the values given in the INRA- AFZ, 2004 tables for growing pigs (89.0% and 86.0% respectively). The DE value, on the other hand, is approximately 250 kcal/kgDM higher than the value reported in the INRA-AFZ, 2004 tables (3723 kcal/kgDM).

The energy value of triticale varieties, estimated in vitro from one year to the next, is slightly more variable than that of wheat as, on average, the maximum deviation over the four years is 71 kcal/kgDM (Fig. 3).

In conclusion, these two studies show that the dOM of wheat and triticale is relatively variable and that the deviations may result in relatively significant DE value differences.