PJB-2019-950
EFFECTS OF INORGANIC PHOSPHATE SUPPLEMENTATION ON THE BIOMASS GROWTH AND COMPOSITION OF AZOLLA (AZOLLA PINNATA R. BR.) IN OUTDOOR CULTURE
MD. AMZAD HOSSAIN
Abstract
Abstract An experiment was conducted to know the effect of supplemental phosphorus (P) on biomass growth and composition of a floating aquatic fern Azolla pinnata cultured in a pit system for 21 days with 4 levels of P (0, 5, 10 and 15 ppm) supplementation. Water quality parameters of the pits were within suitable range for A. pinnata culture. It was observed that biomass production of A. pinnata as fresh weight and dry weight were increased with increased levels of P supplementation upto 10 ppm level. Doubling time was the fastest when culture medium was supplemented with 10 ppm P. P content of A. pinnata was proportional to the P supplementation in culture medium. Supplementation of P also improve the protein and lipid content of A. pinnata. It was concluded that a supplementation of 10 ppm P to culture water is suitable for culture of A. pinnata in outdoor condition.
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