Nutritional evaluation of low phytate and high protein corns

M. W. Douglas, C. M. Peter, S. D. Boling, C. M. Parsons, D. H. Baker

Research output: Contribution to journalReview articlepeer-review


Three chick experiments and two cecectomized rooster experiments were conducted to determine P bioavailability and amino acid (AA) digestibility in two low phytate corns (LP), a high protein corn (HP), and a corn containing both low phytate and high protein content (HP/LP) compared with conventional corn (CONV). From 8 to 20 or 21 d of age, 1-wk-old New Hampshire × Columbian chicks were fed a cornstarch-dextrose-soybean meal (SBM) basal diet containing 0.10% available P or the basal diet supplemented with two concentrations of P (0.05 or 0.06% and 0.10 or 0.12%) from KH2PO4 or two concentrations of the corns (20 or 21% and 40 or 42%). Bioavailability of P based on tibia bone ash was much higher for LP than for CONV; values ranged from 21 to 40% for CONV and from 59 to 95% for LP. Digestibility of AA in cecectomized roosters indicated no significant differences (P > 0.05) between CONV and HP in the first rooster experiment. Digestibilities of eight AA, including lysine, methionine, and arginine, in LP and HP/LP were higher (P < 0.05) than those in CONV in the second rooster experiment. The results of this study indicated that the P in LP was two to three times more bioavailable than the P in CONV and that the digestibilities of AA in HP/LP were equal to or higher than those in CONV.

Original languageEnglish (US)
Pages (from-to)1586-1591
Number of pages6
JournalPoultry science
Issue number11
StatePublished - Nov 2000


  • Amino acid digestibility
  • Chicks
  • Low phytate corn
  • Phosphorus bioavailability

ASJC Scopus subject areas

  • Animal Science and Zoology


Dive into the research topics of 'Nutritional evaluation of low phytate and high protein corns'. Together they form a unique fingerprint.

Cite this