US study rates alternative oilseed co-product feedstuffs for pigs
Carinata meal contributes more ileal digestible amino acid to the pig than cold-pressed canola expellers, while the cold-pressed canola expellers co-product has higher oil content and hence contributes more energy to the pig than carinata meal, found US based researchers.
They were writing in the journal, Animal Feed Science and Technology.
The nutritive value of carinata meal has been evaluated for us in cattle diets, while cold-pressed canola expellers (cold-pressed CME) is available for livestock feeding, noted the team.
However, the nutritive value of carinata meal for pigs has not been reported on previously, and there is limited information on the nutritive value of cold-pressed CME for pigs, they added.
The objective of their study was to determine standardized ileal digestibility (SID) of amino acids (AA) and net energy value of carinata meal and cold-pressed CME for growing pigs.
They gave eight ileal-cannulated barrows were three diets - a replicated 3 × 3 Latin square design in combination with a 3 × 2 Youden square design, to give 8 replicates per diet.
The diets were cornstarch-based, containing cold-pressed CME or carinata meal as sole protein source, and N-free.
Digestibility of AA in feedstuffs was determined by the direct method. Energy digestibility in cold-pressed CME and carinata meal was determined by difference from the N-free diet.
In 2017, we reported on how a US research team was seeking to commercialize carinata for use in feed and fuel.
The Southeast Partnership for Advanced Renewables from Carinata (SPARC) research team was awarded $7.03m for the first year of a multi-year project through a National Institute of Food and Agriculture (NIFA) grant.
The oilseed project was looking at the role carinata meal could play in animal feed for cows and poultry.
The project developed out of an initial interest to find a secondary cropping plant that could be grown in the southeastern US as a winter crop, said David Wright, corresponding researcher and professor in the agronomy department at the University of Florida. That interest developed into evaluation of camelina and then carinata.
Findings
On a dry matter basis (DM), the researchers found that cold-pressed CME and carinata meal contained 396 and 502 g/kg crude protein, 207 and 268 g/kg neutral detergent fiber, 160 and 8.8 g/kg ether extract, 23.2 and 18.2 g/kg lysine, 7.4 and 9.6 g/kg methionine, 16.3 and 18.9 g/kg threonine, and 5.0 and 6.4 g/kg tryptophan, respectively.
The cold-pressed CME, in comparison to carinata meal, had greater SID of lysine, but cold-pressed CME had lower SID of methionine, and tryptophan and tended to be lower in SID of threonine, compared to carinata meal, they reported.
The cold-pressed CME and carinata meal did not differ in coefficient of apparent ileal digestibility of gross energy, but the cold-pressed CME had lower coefficient of apparent total tract digestibility of GE than carinata meal, said the team. The cold-pressed CME and carinata meal did not differ in digestible energy. However, cold-pressed CME had greater net energy value than carinata meal.
“In conclusion, carinata meal has lower energy value than cold-pressed CME, however, the former had greater SID of most AA than the latter. Both Cold-pressed CME and carinata meal can serve as alternative oilseed co-product feedstuffs for pigs.”
Source: Animal Feed Science and Technology
DOI: https://doi.org/10.1016/j.anifeedsci.2020.114496
Title: Nutritive value of carinata meal and cold-pressed canola expellers for pigs
Authors: S. Petros Ndou, T. Awori Woyengo
