EFFECT OF PARTIAL SUBSTITUTION OF SOYBEAN MEAL WITH LUPINE SEEDS ON GROWTH AND ECONOMIC EFFICIENCY OF BROILERS
D. Mierlita, Diana Popovici
The aim of the study was to investigate the effects of different levels of lupin seeds alkaloid-free in the diet on the growth and economics efficiency of broiler chickens. A total of 120 1-day-old Ross 308 chicks were divided into four batches. Batch Lc (the control) was fed on a maize and soybean diet. Different levels of lupin seeds were used in the experimental diets (low, medium and high level in E1, E2 and E3 batches, respectively) instead of a soybean meal. All diets were formulated to contain similar levels of metabolizable energy, crude protein and amino limited. A feeding program was used to offspring in three phases: starter (1-21 days), growth (22-35 days) and finishing (36-42 days). The results show that replacing protein from soybean meal with lupine flour at low or medium (up to 30% in the starter phase and 60% in growing and finishing phase: group E2) has no adverse effects on growth in weight and feed conversion ratio. Introduction of lupine flour in chickens in high level (40% in the starter phase and 80% in growing and finishing phase: group E3) had a negative influence on growth performance (p <0.05). Introduction of lupine seed in diet chickens led to decreasing the cost of feed on up to 29,68%, allowing a progressive increase up to 41,90% of profit got the chicken.
Key words: lupine seeds, broiler, performance