EffEct of thE addition of SPIRULINA PLATENSIS on thE productivity and somE blood paramEtErs on growing pigs

Nedeva, R., G. JoRdaNova, e. KistaNova, K. shumKov, B. GeoRGiev, d. aBadGieva, d. Kacheva, a. shimKus and a. shimKiNe, 2014. effect of the addition of Spirulina platensis on the productivity and some blood parameters on growing pigs. Bulg. J. Agric. Sci., 20: 680-684 A scientific economic experiment with a total number of 48 Danube White pigs, divided into 3 groups of 16 pigs each, spread into 8 pig pens in two repetitions was carried out at the Agricultural institute – Shumen. The experiment was started with 12.15-12.471 kg live weight and finished with 30.9-33.9 kg. The experiment period was 47 days. the aim of the present study was to investigate the effect of the addition of spirulina platensis on the productivity, some blood parameters and health status on growing pigs. the addition of microalgae Spirulina platensis (2 and 3 g/capita daily) in the compound feed of growing pigs (from 12.1512.471kg to 30.9-33.9 kg live weight) from Danube White breed, significantly (p≤0.05) increases the growth intensity with 12.50 % and 14.25 % and reduces the compound feed conversion and nutrients. the addition of Spirulina platensis effects insignificantly on the hemopoiesis stimulation – the number of erythrocytes and hemoglobin are higher with 15 % and 13 % respectively in animals fed with 3 g/capita daily microalgae. there is a tendency of small number of sick animals (2.40 % and 2.13 %) fed with Spirulina platensis compared with those in the control group (5.40 %).