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STUDIES ON POTASSIUM-LYSINE INTERRELATIONSHIPS IN BROILER CHICKS 1. EFFECT OF POTASSIUM-LYSINE INTERRELATIONSHIPS ON GROWTH PERFORMANCE AND NUTRIENT UTILIZABILITY

  • Shin, H.Y. ;
  • Han, I.K. ;
  • Choi, Y.J.
  • Received : 1991.03.25
  • Accepted : 1991.12.23
  • Published : 1992.03.01

Abstract

In order to study the effects of dietary potassium and lysine levels on growth performance and nutrient utilizability in broiler chicks, an experiment was conducted in $3{\times}3$ factorial arrangement with three levels of dietary potassium (0.3, 0.6 and 1.2%) and three supplemented levels of dietary lysine (0.6, 1.2 and 2.4%). A total number of 360 male broiler chicks was used for 6 weeks. Birds fed optimum lysine (1.2%) diets had the highest body weight gain and feed efficiency, followed by those fed low lysine (0.6%) and high lysine (2.4%) diets (p < 0.01). But levels of dietary potassium had no effects on the body weight gain and feed efficiency. Interaction between potassium and lysine was not shown (p > 0.05). High level of lysine resulted in higher mortality than that of optimum or low level of lysine (p < 0.01). The levels of supplemented lysine affected utilizability of ether extract, total carbohydrate, and nitrogen retention (p < 0.01). But supplemented potassium levels did not affect nutrient utilizability and interaction between potassium and lysine was not shown (p > 0.05).

Keywords

Potassium;Lysine;Interrelationship;Broiler