Metabolizable energy and amino acid digestibility of decorticated extruded safflower meal

An experiment was conducted to determine TME and amino acid digestibility of several dehulled extruded safflower meals. Finely ground partially dehulled extruded (ESM), partially dehulled solvent-extracted (SESM), extensively cleaned dehulled and extruded safflower meal (CSM), or soybean meal 44 (SB...

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Bibliographic Details
Published in:Poultry science 2010-09, Vol.89 (9), p.1962-1966
Main Authors: Farran, M.T, Barbour, G.W, Usayran, N.N, Kayouli, C
Format: Article
Language:English
Subjects:
amino acids
Amino Acids - metabolism
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
Carthamus tinctorius
Chickens
Diet - veterinary
dietary fiber
digestibility
Digestion - physiology
energy content
Energy Metabolism - physiology
extraction
extrusion
feed processing
feed quality
fiber content
grinding
hulls
Male
metabolizable energy
nonthermal processing
nutritive value
poultry
protein content
safflower meal
Seeds
solvents
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Summary:An experiment was conducted to determine TME and amino acid digestibility of several dehulled extruded safflower meals. Finely ground partially dehulled extruded (ESM), partially dehulled solvent-extracted (SESM), extensively cleaned dehulled and extruded safflower meal (CSM), or soybean meal 44 (SBM 44) was intubated to 9 fasted mature roosters with 40 g per rooster and total excreta was collected.The concentrations of all essential amino acids in CSM were higher than those in ESM and SESM. Also, compared with SBM 44, CSM was deficient in lysine, slightly higher in TSAA and tryptophan, but much higher in arginine. The AMEn and TMEn of CSM were 2,413 and 2,832 kcal/kg, respectively, and were higher than those of SBM 44 (P < 0.01). The true lysine digestibilities of CSM and SBM 44 were similar but were higher than those of ESM and SESM (P < 0.05). However, ESM, SESM, and CSM had similar true tryptophan and threonine digestibilities that were lower than that of SBM 44 (P < 0.05). With respect to TSAA, all feed ingredients under investigation had similar apparent and true digestibilities. In conclusion, extensive hull removal of safflower seeds followed by cold extrusion produced a low-fiber CSM rich in both energy and protein that makes it a promising feed ingredient for poultry.
ISSN:0032-5791
1525-3171
DOI:10.3382/ps.2009-00559