An experiment was conducted to determination of the energy equivalency of lysophospholipid in broiler diets. Experiments were carried out as a completely randomized design involved 9 treatments of 6 replicates and 10 chicks in each pen. BW and cumulative feed intake were measured weekly. Lipid profile, plasma calcium and phosphorus and relative organs weight and length were measured at 42 d of age. Replacement of soybean oil with lysophospholipid severely inhibited BW gain, also increased FCR without any consequence in feed intake in broilers fed soycorn mash diets (P 0.05). Lysophospholipid supplementation didnot significantly alter blood lipid profile and plasma phosphorus and calcium content, and HDL and LDL cholesterol concentration. The inclusion of lysophospholipid linearly (P 0.05) increased abdominal fat content of broilers fed mash diets. Nonlinear and linear equations were generated for the lysophospholipid and graded levels of Energy in mash diets. Based on an assessment for the r2 and P values of the equation, for body weight gain, feed intake and feed conversion ratio were sensitive measurements of responses to energy levels in treatments. The nonlinear or linear response equation with the higher r2 values for added lysophospholipid and the equation for diferent levels of energy were set to be equal and were solved. The body weight gain and feed conversion ratio responses from each gram of lysophospholipid per kg of diet at 28 and 42 d of age was therefore equal to 6, 9, 4.7 and 7 kcal/kg of diet respectively
