Effect of dietary protein and amino acid level on apparent ileal protein and amino acid digestibilities in newly weaned pigs. (Abstract)
- Publikations-Art
- Kongressbeitrag
- Autoren
- Eklund, M., Piepho, H.-P., Tafaj, M., Rademacher, M. and Mosenthin, R.
- Erscheinungsjahr
- 2006
- Veröffentlicht in
- Book of Abstracts
- Herausgeber
- Danish Institute of Agricultural Sciences
- Serie/Bezeichnung
- dpp 2006
- Seite (von - bis)
- 23
- Tagungsname
- 10th International Symposium on Digestive Physiology in Pigs.
- Tagungsort
- Vejle (Denmark)
- Tagungsdatum
- 25.-27.05.2006
- Schlagworte
- amino acid digestibilities, amino acids, crude protein, weaning pig
The study was carried out to investigate the effect of graded levels of dietary crude protein (CP) and amino acids (AA) on apparent ileal digestibility coefficients (ADC) of CP and AA in piglets. Twelve three week old barrows were fitted with a simple T cannula at the distal ileum. They were fed six com starch-based diets containing six graded levels of CP from casein (9.0, 15.5, 22.0, 28.5, 35.0, 41.5% CP, as-fed). Digestibility measurements were carried out as four weekly repeated measurements with two pigs per CP level. The daily feed allowance was kept constant at 3% of BW. ADC of CP and AA increased quadratically with increasing dietary CP content from 9.0 to 22.0%. Above this level, there was no further increase in ADC, i.e., ADC became independent of dietary CP intake. Plateau digestibilities of CP and AA did not change up to 41.5% CP in the assay diet. ADC of CP and AA were not affected by the age of the animal except for slightly (p<0.05) lower ADC for some AA in the last week. Plateau digestibilities (p<0.05) for CP, LYS, MET, THR and TRP were 94.0, 96.8, 97.8, 93.2 and 94.2% with corresponding break points (p<0.05) at 23.3, 1.68, 0.68, 1.11 and 0.27 (% DM). Above these break points ADC are not affected by variations in basal ileal endogenous CP and AA losses. In conclusion, the quadratic with plateau model can be used for grower-finisher pigs and piglets as well. The capacity to digest CP and absorb AA was not limited under these experimental conditions.