caa a22 4500 397569416 CHVBK 20180308164837.0 cr unu---uuuuu 161202e199601 xx s 000 0 eng 10.3382/ps.0750120 doi (NATIONALLICENCE)oxford-10.3382/ps.0750120 Effect of Glutamic Acid on Broilers Given Submarginal Crude Protein with Adequate Essential Amino Acids Using Feeds High and Low in Potassium [Elektronische Daten] [E. T. MORAN, H. L. STILBORN] Broiler males were examined for their response to feeds containing CP 1 to 2% below levels advocated by NRC (1994) and when supplemented with L-glutamic acid. Crude protein and glutamic acid treatments were imposed in starting, growing, and finishing feeds over 7 wk with K at high and low levels likely to occur in practice (0.80 vs 0.65 to 0.55%). All feeds were formulated to be isocaloric (3.20 kcal ME/g) and satisfy NRC (1994) essential amino acid (EAA) minimum requirements. Improved live weight gain occurred during the first 6 wk with supplementation of glutamic acid to the low CP feed but not when intact protein per se was used to increase CP. A similar advantage in growth was obtained from glutamic acid in response to its addition at equivalence of 1 to 2% CP as well as when dietary adjustments maintained low CP. Response to altered K could not be interpreted because of concurrent differences in glutamic acid and AMEn intakes. High glutamic acid levels did not decrease abdominal fat unless CP increased concurrently, whereas carcass back bruising and drumstick deformations were relieved by supplemental glutamic acid independent of CP. Increased weight gain from glutamic acid was only evident with drumsticks and debris that included the back when carcasses were cone-deboned. Supplemental glutamic acid is believed to improve the rate of connective tissue formation during rapid growth. © 1996 Poultry Science Association, Inc. Metabolism and Nutrition nationallicence broiler nationallicence carcass quality nationallicence glutamic acid nationallicence protein requirement nationallicence MORAN E. T. Poultry Science Department and Alabama Agricultural Experiment Station, Auburn University, Alabama 36849 and aut STILBORN H. L. Heartland Lysine, Inc., Chicago, Illinois 60631 aut Poultry Science Oxford University Press 75/1(1996-01), 120-129 0032-5791 75:1<120 1996 75 ps https://doi.org/10.3382/ps.0750120 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.3382/ps.0750120 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MORAN E. T. Poultry Science Department and Alabama Agricultural Experiment Station, Auburn University, Alabama 36849 and aut NATIONALLICENCE 700 1- STILBORN H. L. Heartland Lysine, Inc., Chicago, Illinois 60631 aut NATIONALLICENCE 773 0- Poultry Science Oxford University Press 75/1(1996-01), 120-129 0032-5791 75:1<120 1996 75 ps Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford