Parthasarathy, R.Kadirvel, R.Kathaperumal, V.TANUVAS2018-02-012018-02-012001-020379-543 Xhttp://krishikosh.egranth.ac.in/handle/1/5810040218TNV_CRN_2001_V30_I1&2_24-26pdfTwo feeding trials were conducted to study the economics of utilizing a water fem, Azolla sp. in broiler rations. Azolla was incorporated at 0,5,l0,15 and 20 per centlevels to replacea protein mix containing wheat bran and groundnut cake (53:47) up to 5 weeks of age in the first trial and to replace a protein mix containing wheat bran and fish meal (52:48) up to 8 weeks of age in the second trial. The birds receiving5 per centAzolla in both the trials performed significantly well (P < 0.01) and gave better economic returns viz. 15 and 16 per cent gain over other groups. The findings of this study indicated that the incorporation of Azolla as rt feed ingredient at 5 per cent level in broiler rations could provide promising economic returns.enVeterinary ScienceArticle