A new study with broiler chickens shows that supplementation with a multi-carbohydrase enzyme formulation can substantially boost the nutritional power of camelina meal, a unique feed source on the rise in Canada and the U.S. Results were unveiled at the 2015 Poultry Science Association (PSA) Annual Meeting, which concluded yesterday.
"Camelina is the new kid on the block as a
feed option for poultry," says Rob Patterson of Canadian Bio-Systems Inc.
(CBS Inc.), who conducted the study along with Dr. Tofuko Woyengo and Dr. Ruurd
Zijlstra of the University of Alberta. "Our study confirms it has a lot to
offer from a nutritional standpoint and that using the right formulation of
multi-carbohydrase is an effective way to capture more of that full nutritional
While it's one thing to have strong nutritional
value, it's another to make sure as much of that value as possible is
available for absorption and use by the animals, explains Patterson, Technical
Director of CBS Inc. Multi-carbohydrase enzyme technology, with its multiple
enzyme sources and activities, acts as a universal key that frees nutrients
from a number of otherwise hard-to-digest feed components. "This supports
the maximum nutrient extraction possible for energy and growth."
Camelina, also known as “false flax” or “wild
flax,” is an oilseed crop that initially experienced significant demand before
the recent era of dominance of rapeseed and canola. The unique crop, recognized
as an excellent source of Omega-3, is now enjoying a fresh resurgence due to
its advantages as an option for healthy oils, biofuels, high-end bio-lubricants
and bio-plastics, and even jet fuel. It grows well on the Canadian prairies and
in key U.S. growing regions, where it is well adapted and has resistance to
many common pathogens and pests.
"The rise in camelina production is now
becoming a good news story for livestock and poultry industries, because the
residual meal left over after oil extraction has shown an attractive nutritional
profile for animal feed," says Patterson. "As an added advantage, the
high concentration of Omega-3 oils in the meal has been shown to produce Omega
meat in broiler chickens - making it a great source not only of high quality
feed but as a means of adding value to poultry products."
The study focused on variations of a diet using
corn and cold-pressed camelina cake (CPCC). Diets that included
multi-carbohydrase supplementation showed a substantial increase in the
standardized ileal digestibility (SID) of three different major amino acids -
methionine, threonine and tryptophan - along with a strong overall boost to the
apparent metabolizable energy, N-corrected (AMEn) value of the diet, which
increased by 5.6 percent.
The AMEn value shows the difference between the
gross energy in the feed and the gross energy in the feces, urine and gasses,
to reflect how much energy is actually captured by the animal instead of passed
"The results show multi-carbohydrase is
effective with camelina meal and strong gains are possible," says
Patterson. "Indications are the level of advantage can be further
increased depending on the level of multi-carbohydrase used and the overall
diet composition. Each poultry operation can determine the ratios that work
best economically and effectively for them, depending on their own specific
objectives and feeding approaches."
Earlier this year Canadian approval was granted
for feeding cold-pressed non-solvent extracted camelina meal to broiler
chickens at up to 12 percent inclusion, and approval for inclusion in layer
feed is also being considered.
Similarly, the U.S.-FDA has expressed "no
objection" to feeding camelina meal to broiler chickens and laying hens up
to 10 percent of their final diet.
The CBS Inc. and University of Alberta study
involved 600 male broiler chicks divided into 40 groups and fed five diets in a
completely randomized design with eight groups per diet, from 15 to 21 days of
age. Differences were observed among variations of a corn-based basal diet, the
same basal diet with 30 percent replaced by CPCC, and both of these diets
without or with multi-carbohydrase enzymes supplementation, as well as an
The corn-based basal diet was fed to determine
nutrient digestibility and retention for CPCC by substitution. The N-free diet
was fed to estimate basal endogenous amino acid losses, for determining the SID
of amino acids. On a dry matter basis, CPCC contained 39.8 percent crude
protein, 1.89 percent lysine, 0.70 percent methionine, 1.56 percent threonine,
0.45 percent tryptophan, 12.7 percent ether extract, and 38.3 percent neutral
detergent fiber. In addition to boosting the availability and absorption of
methionine, threonine and tryptophan, multi-carbohydrase increased the AMEn
value of CPCC from 1,533 to 2,072 kcal/kg of dry matter.
The specific multi-carbohydrase formulation used
in the study was Omegazyme from CBS Inc.
on July 31, 2015